Matlab Compare Cell Array Elements

In previous versions of MATLAB, you can use the "strfind" function. A cell array, then, is a collection of cells (containers) containing whatever you want. To indicate an array (element-by-element) operation, precede a standard operator with a period (dot). This might seem confusing, and it is. by George Dvorsky: With the decade winding down it's time for us to set our sights on the next one… The 2020s promises to be anything but dull. Therefore, arrays that contain NaN elements are not equal, and isequal returns zero when comparing such arrays. In previous versions of MATLAB, you can use the “strfind” function. For a cell array case_expression, at least one of the elements of the cell array matches switch_expression, as defined above for numbers, strings and objects. Add new elements into cell array inside a loop. / , respectively. Most expressions take such arrays and return such arrays. For code generation, after you use cell to create a variable-size cell array, you must assign all elements of the cell array before any use of the cell array. in the command part (x TO y) which points out the needed array slice the x and y value can be omitted giving the meaning to use all chained array cells (FROM x TO end ) or (begin TO y). Spotify tracks and a growing array of other apps and services on to the display. We developed a methodology using 3D bio-printing technology to create a functional in vitro vascular channel with perfused open lumen using only cells and biological matrices. The material emphasizes a solid understanding of 1D and 2D arrays, teaching effective use of the array/matrix operations that make MATLAB such a powerful engineering tool. MATLAB commands in numerical Python (NumPy) 3 Vidar Bronken Gundersen /mathesaurus. Learn more about matlab, cell arrays. I want to start with the first element of glf which is '070617' and compare it with all elements of grmmf so that I know the first index in grmmf when the values are equal. How to extract element of all matrices within a Learn more about cell array, handles, loop, cellfun. By default the result would be a cell array of length equal to the length of your elements cell array and in each cell of the result will be an array of indices to the start of any matches of that element. Use the isequalwithequalnans function when you want to test for equality with NaNs treated as equal. Open Mobile Search. Like 2nd row of cell array has 4 and 3, it is present in 1st column of 2D array, it should display both rows (and all other elements as zero). So, i need the answer to be "Logical 1" as some of the elements of the cell array are equal. MATLAB Answers. The default data type is a 2D array (or matrix) of doubles. Raise elements of cell arrays in the power of 2. An array having more than two dimensions is called a multidimensional array in MATLAB. for x{1,1}{2,1} it will consider 2nd non zero element of 1st row. A two-dimensional array can also be used to store objects, which is especially convenient for programming sketches that involve some sort of "grid" or "board. Let's see what ismember does: >> ismember(a,[1 2]) ans = 1 1 0 0 0 0. The difference is that using parenthesis returns a cell array with a single element while the curly braces returns the element in the first slot of the cell array. Specifically, this is about finding a string within another cell array of strings, where the thing I’m really interested in is the index of the cell array where the reference string occurs. For example, let's create a two-dimensional array a. by George Dvorsky: With the decade winding down it’s time for us to set our sights on the next one… The 2020s promises to be anything but dull. matlab Newsgroup [email protected] Individuals elements are accessed or created with the curly bracket {} notation. ' nchoosek ' works for one row, but when other rows are added like the following example, the code does not work. A cell array, then, is a collection of cells (containers) containing whatever you want. 3-1 Element-by-element operations. Operations on these arrays in all dimensionalities including 2D are element-wise operations. An array having more than two dimensions is called a multidimensional array in MATLAB. If one input is a datetime array, the other input can be a datetime array, a character vector, or a cell array of character vectors. how to construct fh?. I recently had a situation where I needed to delete an entry from a cell array. numel Number of elements in a matrix or cell array ones Create an array of all ones rand Uniformly distributed random numbers and arrays randn Normally distributed random numbers and arrays zeros Create an array of all zeros : (colon) Regularly spaced vector Special Variables and Constants ans The most recent answer. Cell array is a 20x2 dataset with 3 classes. permitted element types. Cell viability was measured after PC3 (prostate) cells were treated with 250 ng/mL TRAIL, shear stress of. Demonstration. e cell 1 627*1 (row=627 and col=1) and inside each row (from 1 to 627 ) i have 1*3 cell!. Array Operations. Cell arrays are available both in Matlab and in the standalone versions of Dynamo. Each cell is a rectangle whose brightness oscillates from 0-255 with a sine function. >> cell_name{row,col} = data; Storage is allocated dynamically. MATLAB Answers. PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. MATLAB Central contributions by lucksBi. And this is true for a scalar cell array, a vector cell array, or even a multi-dimensional cell array: it is unrelated to whether the cell array is multi-dimensional or not. We shouldn't be surprised if it's one of these data giants - or another outsider like Uber - that ends up as orchestrator of the emerging mobility ecosystems, rather than a. An element of the output array is set to 1 if all input arrays contain a nonzero element at that same array location. Therefore, arrays that contain NaN elements are not equal, and isequal returns zero when comparing such arrays. A cell array, then, is a collection of cells (containers) containing whatever you want. You will have to pay extra through your carrier to have 4G LTE for calls and data, but a sensible array of apps means the Apple Watch really can work as an iPhone replacement, if only for a short. • Structures: mail boxes have names, cell arrays: mail boxes have numbers. e cell 1 627*1 (row=627 and col=1) and inside each row (from 1 to 627 ) i have 1*3 cell!. While you may think that using works, it in fact returns the "cell" of the array, not the "value" of the cell, which 99% of the time is not what you are looking for. Learn more about matlab. I have a two cell arrays R and C (two vectors with R(n-elements), C(m-elements)) and my task is to compare each element of R with each element of R and each element of C with each element of C. I would like to compare 5 {13x13} cell arrays consisting of matrices, in a way that each cell element (matrix) would compare with its fellow element of the other cell for example A{1x1}-to-B{1x1} A{1x2}-to-B{1x2} and so on. Toggle Main Navigation. The result may fit in a single cell or it may be an array. 5 Round off Desc. Specifically, this is about finding a string within another cell array of strings, where the thing I’m really interested in is the index of the cell array where the reference string occurs. One basic area involves the relationships between neural activity and the main supportive substrates of glucose and lactate. Numeric inputs are equivalent if they are the same size and their contents are of equal value. I want to compare these arrays and put the result in another array of same size,such that during comparison if the compared elements have the same sign (-/- or +/+) then the new resulted array should get NaN for that comparison entry and if the signs of the compared elements is different(-/+ or +/-), then keep the original value of the original array from where I started i. However, "strfind" returns a cell array of indices. I am trying to compare two cell arrays, 1x160 (a) and 80x1(b). If both inputs are categorical arrays that are not ordinal, they can have different sets of categories. Operations on the 2-D instances of these arrays are designed to act more or less like matrix operations in linear algebra. "It's the idea of the old with the new. Compare values of array of matrix 5x5x106. MATLAB Tutorial – LOOPING, IF STATEMENTS, & NESTING ES 111 2/6 The function takes a as an input. One looks like this: glf=['070617', '091216','280217'] and the other one is grmmf=['070617', 280217', '070617','280217']. Asked then do you want the comparison to proceed matching field to field? is a cell array which contains. I want to compare these arrays and put the result in another array of same size,such that during comparison if the compared elements have the same sign (-/- or +/+) then the new resulted array should get NaN for that comparison entry and if the signs of the compared elements is different(-/+ or +/-), then keep the original value of the original array from where I started i. append string to each element in string cell array. How do I access array elements in for loop?. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. A multi-dimensional array is generally something with three or more dimensions. My for loop cycles through a series of initial CL values and then a lot of calculations are done and I get final values for CL "CL_IC2. This might seem confusing, and it is. I have a cell array consisting of n-number of cells, each of different size. The Matlab Environment 1 2. How to store the cell array elements into Learn more about cell array, cell array into logical array. Enclose indices in curly braces, {}, to refer to the text, numbers, or other data within individual cells. 2 Comments. A two-dimensional array can also be used to store objects, which is especially convenient for programming sketches that involve some sort of "grid" or "board. Use the isequalwithequalnans function when you want to test for equality with NaNs treated as equal. A cell array, then, is a collection of cells (containers) containing whatever you want. From the automation revolution and increasingly dangerous AI to geohacking the planet and radical advances in biotechnology, here are the most. Hi, I have two cell arrays. Open Mobile Search. However, for code generation, the elements are unassigned. I hope the question is clear and would get some help soon. (NASDAQ:NTLA) Q3 2019 Results Earnings Conference Call October 31, 2019 8:00 AM ET Company Participants Lina Li - Senior Manager, Investor Relations John Leonard. MATLAB and NumPy both allow you to explicitly specify the specific elements in an array, as you have seen in the previous section. In all tumor cell lines, we have tested Tumor Treating Fields has a consistent effect and we have not found a tumor cell line that does not respond to Tumor Treating Fields. A cell array, then, is a collection of cells (containers) containing whatever you want. In the case of a list of strings this is very useful as the size issue is properly taken care of. In previous versions of MATLAB, you can use the "strfind" function. 3 in 1st row is first non zero column index ) in 1st row of y, and in 2nd row(As x{1,1}{1,1}=2), it will check what value is placed at that non zero index and store it in another cell array. How do I compare the elements of two vectors 1 Learn more about set, sets, vector, index, cell arrays, for loop, if statement. Learn more about cell arrays, compare. 2nd column is the class. But if you're looking for pure power with a nice selection of bells and whistles, the MAG P3 might be what you're looking for. Enclose indices in curly braces, {}, to refer to the text, numbers, or other data within individual cells. If both inputs are categorical arrays that are not ordinal, they can have different sets of categories. Toggle Main Navigation. I only need the information that how many rows are there Thnks in advance. 3-1 Element-by-element operations. Learn more about cell arrays. >> cell_name{row,col} = data; Storage is allocated dynamically. I would like to compare 5 {13x13} cell arrays consisting of matrices, in a way that each cell element (matrix) would compare with its fellow element of the other cell for example A{1x1}-to-B{1x1} A{1x2}-to-B{1x2} and so on. " "Our album 'Apoptosis' is all about new cells replacing old cells," said McShane. cumsum(axis=0) Cumulative sum (columns). Determine if elements in the first column of colors are greater than the elements in the second column. sum(axis=0) Sum of each column: sum(a') a. Colon notation can be used to create a vector as follows. The following literals create the same array:. Individuals elements are accessed or created with the curly bracket {} notation. Cell array is a 20x2 dataset with 3 classes. Array addition and subtraction require that both arrays have the same size. My for loop cycles through a series of initial CL values and then a lot of calculations are done and I get final values for CL "CL_IC2. Array literals can have a nested structure, but Octave will flatten them. how to find index of cell array?. For any input cell whose text does not contain 'bla', “strfind” returns an empty cell. Now I want to compare date and time column of one cell array with the other cell array which contains date and time column. How can I do this faster?. Learn more about matlab, cell arrays. Cells are more or less like arrays, except that each elements can be of a different type and/or size. MATLAB Answers. Next, in order to compare two matrices you should use the == operator. However, “strfind” returns a cell array of indices. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. Multidimensional arrays in MATLAB are an extension of the normal two-dimensional matrix. A cell array, then, is a collection of cells (containers) containing whatever you want. When you use cell to create a variable-size cell array, for example, cell(1,n), MATLAB ® assigns an empty matrix to each element. Either one can also be a character array with the right number of. My for loop cycles through a series of initial CL values and then a lot of calculations are done and I get final values for CL "CL_IC2. This is of fundamental significance for the interpretation of. The other cell array also looks the same as above. The material emphasizes a solid understanding of 1D and 2D arrays, teaching effective use of the array/matrix operations that make MATLAB such a powerful engineering tool. Comparing single element of one array with Learn more about logic, array, array comparison MATLAB. Toggle Main Navigation. Permitted data types for array elements. trace(offset=0) Sum along diagonal: cumsum(a) a. What Loren helped me realize is that cell arrays use () just like regular MATLAB arrays to index into elements of the array, while. numel Number of elements in a matrix or cell array ones Create an array of all ones rand Uniformly distributed random numbers and arrays randn Normally distributed random numbers and arrays zeros Create an array of all zeros : (colon) Regularly spaced vector Special Variables and Constants ans The most recent answer. For example, if x is an array, then y = sin (x) will result in an array y whose elements are sine of the corresponding elements of the array x. compare cell array elements with non zero Learn more about cell arrays. Common applications of cell arrays include storing separate pieces of text and storing heterogeneous data from spreadsheets. Then it will calculate c(1), at the end it will go back to calculate c(2), and then go back and calculate c(3) and stop. I am trying to compare each element of an array with its subsequent elements and get the count of number of times the current element is greater than the subsequent elements. For instance, if you want to store how to say hello in multiple languages, you will do :. 5 Round off Desc. Now, I have to find how many of the values 500 elements of the 8th column of binData{d,s,h} is less than equal to the value of the element of threshold{d,s,h}. MATLAB Answers. How can I compare the value in column 2 at. This isn't a kit for dainty hands or stealth vapers. I am trying to compare each element of an array with its subsequent elements and get the count of number of times the current element is greater than the subsequent elements. An array is an n -dimensional collection of numbers. Un tableau de cellules (cell array) permet de stocker différent type de variables dans une seule. The parameter that find takes is simply a logical array where elements in a that match either 1 or 2 are 1 and all other elements are 0. For example, let's create a cell array of 2 rows and 3 columns, and in every cell of that let's put a 4 element integer array. I recently had a situation where I needed to delete an entry from a cell array. So, i need the answer to be "Logical 1" as some of the elements of the cell array are equal. My for loop cycles through a series of initial CL values and then a lot of calculations are done and I get final values for CL "CL_IC2. This MATLAB function returns a MATLAB cell array that contains all of the elements in obj. One looks like this: glf=['070617', '091216','280217'] and the other one is grmmf=['070617', 280217', '070617','280217']. The order of the inputs does not affect the comparison results. 2nd column is the class. For example, let's create a two-dimensional array a. I need to compare the Column 1 of the cell array final_gps with cell array. Comparing single element of one array with Learn more about logic, array, array comparison MATLAB. Individuals elements are accessed or created with the curly bracket {} notation. Enclose indices in curly braces, {}, to refer to the text, numbers, or other data within individual cells. MATLAB Answers. My for loop cycles through a series of initial CL values and then a lot of calculations are done and I get final values for CL "CL_IC2. Is there maybe an even better way? Discover what MATLAB. " "Our album 'Apoptosis' is all about new cells replacing old cells," said McShane. compare two strings of cell array at different Learn more about matlab, string, cell arrays, index, find. MATLAB and NumPy both allow you to explicitly specify the specific elements in an array, as you have seen in the previous section. Open Mobile Search. If I want all elements in B that are not in A, how would I find that? (say A{1,1} = B{1,1} but A{2,1} ~= B{2,1}, how could I have matlab return this?). MATLAB provides two notations for "matrix division" that provide rapid solutions to simultaneous equation or linear regression problems. Toggle Main Navigation. Subject: [matlab] Comparing elements of arrays of different Sizes Hello all, Can anybody help me to find out the method to compare the elements of different sized arrays ? I have one array of 100 elements and I am generating second array within a loop having some arbitrary number of elements. thanks for your time. Comparing single element of one array with Learn more about logic, array, array comparison MATLAB. 3-1 Element-by-element operations. If those cells happen to contain more cell arrays, then of course more cell array indexing will be required. Kay Fitts Dept. Citations may include links to full-text content from PubMed Central and publisher web sites. While you may think that using works, it in fact returns the "cell" of the array, not the "value" of the cell, which 99% of the time is not what you are looking for. Cell Arrays Cell arrays were introduced in MATLAB 5. How do I identify each element in a cell array Learn more about cell array, identification, string MATLAB Answers. Learn more about cell arrays MATLAB. How can I compare the value in column 2 at. In MATLAB®, the basic data type is a multidimensional array of double precision floating point numbers. Neural activity is closely coupled with energy metabolism but details of the association remain to be identified. I have a two cell arrays R and C (two vectors with R(n-elements), C(m-elements)) and my task is to compare each element of R with each element of R and each element of C with each element of C. will give you the indices into your string to the start of any matching elements. numel Number of elements in a matrix or cell array ones Create an array of all ones rand Uniformly distributed random numbers and arrays randn Normally distributed random numbers and arrays zeros Create an array of all zeros : (colon) Regularly spaced vector Special Variables and Constants ans The most recent answer. This section shows how to add gain or amplitude perturbations on a uniform linear array (ULA) of 10 elements. When comparing an array to a scalar MATLAB compares the scalar to every element from CPS 118 at Ryerson University. The fabricated vasculature has a tight, confluent endothelium lining, presenting barrier function for both plasma protein. The only exception to this rule in MATLAB occurs when we add or subtract a scalar to or from an array. How to store the cell array elements into Learn more about cell array, cell array into logical array. Determine if elements in the first column of colors are greater than the elements in the second column. Is there any built-in function to check that directly in MATLAB. Use the isequalwithequalnans function when you want to test for equality with NaNs treated as equal. Shear sensitization of PC3 cells to TRAIL-mediated apoptosis is reduced by MSC inhibition. for x{1,1}{2,1} it will consider 2nd non zero element of 1st row. x = [4,5,1,2,6] is an array of 5 doubles (double precision floating point numbers). Compare Elements Based on Order. Use the isequalwithequalnans function when you want to test for equality with NaNs treated as equal. The fabricated vasculature has a tight, confluent endothelium lining, presenting barrier function for both plasma protein. by George Dvorsky: With the decade winding down it’s time for us to set our sights on the next one… The 2020s promises to be anything but dull. " I want to see if any of the original CL values are equal to their corresponding CL_IC2 values. Array Basics. MATLAB commands in numerical Python (NumPy) 3 Vidar Bronken Gundersen /mathesaurus. Sum the elements in cell array with different Learn more about cells, nan, sum. My for loop cycles through a series of initial CL values and then a lot of calculations are done and I get final values for CL "CL_IC2. I want to compare these arrays and put the result in another array of same size,such that during comparison if the compared elements have the same sign (-/- or +/+) then the new resulted array should get NaN for that comparison entry and if the signs of the compared elements is different(-/+ or +/-), then keep the original value of the original array from where I started i. • Analogous to P/O boxes. An element of the output array is set to 1 if all input arrays contain a nonzero element at that same array location. But if you're looking for pure power with a nice selection of bells and whistles, the MAG P3 might be what you're looking for. For example, store temperature data for three cities over time in a cell array. Now , take 1st element (i. / , respectively. Numeric inputs are equivalent if they are the same size and their contents are of equal value. for x{1,1}{1,1}=2, it will consider 1st non zero column value (e. up vote 2 down vote favorite. one cell array containing two columns with date as one column and time as other column. Kay Fitts Dept. MATLAB Central contributions by Tha saliem. Now I want to compare date and time column of one cell array with the other cell array which contains date and time column. Please give me an example and don't bother referring me to the MatLab website. The order of the inputs does not affect the comparison results. The zyBooks Approach Less text doesn’t mean less learning. This isn’t a kit for dainty hands or stealth vapers. 04 with value in column 4 at. What Loren helped me realize is that cell arrays use () just like regular MATLAB arrays to index into elements of the array, while. The test compares both real and imaginary parts of numeric arrays. Array Operations. MATLAB provides two notations for "matrix division" that provide rapid solutions to simultaneous equation or linear regression problems. edu January 2017 Contents 1. 2 Comments. Learn more about cell arrays, matrices, loop. How to delete elements from cell arrays?. If both s1 and s2 are string arrays or cell arrays of character vectors, then s1 and s2 must be the same size, unless one of them is scalar. MATLAB Central contributions by lucksBi. The method will be first find the index of the number 8 in a loop in every cell array and then use the following stated_n{index}=[] this will remove the value of 8 and yes find the value ofn8 by comparing or by a conditional statement. The truth is, cell arrays were a late addition to Matlab. Topics include fundamental algebraic techniques, function manipulation and single-independent variable calculus. Compare two cell arrays of different sizes. Hi Friends, I have 2 cell arrays cell1(1*1) and cell2(1*2) I want to compare the elements of cell1 with cell2 and when all the elements of cell 1 exist in both members of cell2 then get its corresponding row from cell2. The zyBooks Approach Less text doesn’t mean less learning. For example, let's create a two-dimensional array a. There is step difference of three in array indices. Now I want to compare date and time column of one cell array with the other cell array which contains date and time column. How do I compare the elements of two vectors 1 Learn more about set, sets, vector, index, cell arrays, for loop, if statement. Permitted data types for array elements. Tables, timetables, structures, and cell arrays are equivalent only when all elements and properties are equal. The other cell array also looks the same as above. Please give me an example and don't bother referring me to the MatLab website. So, i need the answer to be "Logical 1" as some of the elements of the cell array are equal. For example, if x is an array, then y = sin (x) will result in an array y whose elements are sine of the corresponding elements of the array x. Array Multiplication. This isn't a kit for dainty hands or stealth vapers. There are also similar per-element multiplication and division operators,. I have a 333x1 cell array. I want to compare these arrays and put the result in another array of same size,such that during comparison if the compared elements have the same sign (-/- or +/+) then the new resulted array should get NaN for that comparison entry and if the signs of the compared elements is different(-/+ or +/-), then keep the original value of the original array from where I started i. For example: a Stack Overflow. In particular, they all fail if any elements of the provided cell array are the empty array ( [] ) which is somewhat frustrating if the provided text file contains empty cells. com Product enhancement suggestions. edu January 2017 Contents 1. % Create an empty cell array of 2 rows and 3 columns. The test compares both real and imaginary parts of numeric arrays. compare two strings of cell array at different Learn more about matlab, string, cell arrays, index, find. for x{1,1}{1,1}=2, it will consider 1st non zero column value (e. Array Operations. I need to compare the Column 1 of the cell array final_gps with cell array. Now I want to compare date and time column of one cell array with the other cell array which contains date and time column. The Loop is a little more protected from the elements, with an IP66 rating. When sorted, I would prefer, the empty elements at the beginning or the end of the sorted array. I wanna compare each string ans see if they are equal, then if they are equal, insert to new array, or insert 0 otherwise. I want to search elements of cell array in 1st column of 2D array. matlab: Arrays in Octave can only contain numeric elements. Cell viability was measured after PC3 (prostate) cells were treated with 250 ng/mL TRAIL, shear stress of. So, i need the answer to be "Logical 1" as some of the elements of the cell array are equal. MATLAB Answers. • One should address contents, not a structure or an array to perform mathematical operations. They are better discussed in the context of such problems. However, "strfind" returns a cell array of indices. Topics include fundamental algebraic techniques, function manipulation and single-independent variable calculus. com Technical support [email protected] The other cell array also looks the same as above. MATLAB Central contributions by Tha saliem. let all Learn more about image processing, digital image processing, image analysis, image segmentation, image acquisition, simulink, image, simulation. (Behind the scenes Matlab, stores 2 parallel double vectors, one for the real part and one for the imaginary. In the matlab version, the matrix is restored in a cell, different element of the cell means different matrix, and each of the elments can have different size and data type, such as uint8, int32, float and double. e = 1) in vector A and compare it with all elements in vector B. / , respectively. With multidimensional arrays, the slicing is only possible with the last level dimension. Or you can put them all into a cell array (rather than concatenating them) like this: >> {a. The test compares both real and imaginary parts of numeric arrays. This is my receiver threshold. How to delete elements from cell arrays?. See Example 4, below. Open Mobile Search. 0 to allow us to collect arrays of different sizes and types. My cell arrays consist of cells which have a number of strings inside. MATLAB Answers. how to construct fh?. PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. In the matlab version, the matrix is restored in a cell, different element of the cell means different matrix, and each of the elments can have different size and data type, such as uint8, int32, float and double. how to find index of cell array?. Compare the first N characters of character arrays. Either one can also be a character array with the right number of rows. com Web comp. Cell arrays were introduced in MATLAB 5. I would like to compare 5 {13x13} cell arrays consisting of matrices, in a way that each cell element (matrix) would compare with its fellow element of the other cell for example A{1x1}-to-B{1x1} A{1x2}-to-B{1x2} and so on. % Create an empty cell array of 2 rows and 3 columns. The material emphasizes a solid understanding of 1D and 2D arrays, teaching effective use of the array/matrix operations that make MATLAB such a powerful engineering tool. Let's dive in, specs first. Is there any built-in function to check that directly in MATLAB. Learn more about matlab, cell arrays. enclosures array elements. For example, store temperature data for three cities over time in a cell array. Array Operations. for x{1,1}{2,1} it will consider 2nd non zero element of 1st row. x = [4,5,1,2,6] is an array of 5 doubles (double precision floating point numbers). This is of fundamental significance for the interpretation of. MATLAB Answers. I would like to know if there is any way by which I can compare all the elements and remove the matched elements if.