21 how to delete columns in matlab? Ultimate Guide

21 how to delete columns in matlab? Ultimate Guide

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Deleting certain columns in a matrix [1]

Now I want to delete certain columns within MATLAB.. For instance if I want to delete the 3rd column, 4th column, 8th column, 14th column and 33 column
FWIW, above comment from 2016-09-02 does not address the question (deleting multiple columns), and is furthermore possibly a fairly inefficient way of doing what it does (deleting one column).. A(:,[m n p…])=[]; % A input matrix and m n p are #columns to be deleted
Using this answer, I can simply put my list into the [] and poof outliers are gone.. outliers = find (errorDist > thresholdValue); % list of outliers

Deleting a Column from an array? [2]

How would I do so and keep all the rest the same so that it is a 21 x 344 array. If ‘M’ is your matrix, just set the entire column to the empty array []:
A(:,9)=[] % which reads all rows of A in column 9 is now empty.. Thats what the : in the first part as indexing goes (rows, columns)
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How to eliminate certain columns from a matrix [3]

s is a mxn matrix.I need to remove the odd columns i,e, the 1st,3rd.. % 1:2:end runs a loop from 1 till the numbe rof columns, increments the index by 2 every time and
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How do I delete rows and columns from a matrix [4]

I know this has been asked before, but I am new to matlab and all the answers I read through were jargon to me. So if someone could really dumb this down that would be wonderful
If I want to make A1 = the same matrix with the second row deleted and A2 = matrix A with the second column deleted. How would I do this? I can delete the end rows and columns, but can not seem to figure out a way to delete middle sections
The first method in each selects all but the second row or column, and the second method in each sets a specific row or column to ‘empty’ or ‘[]’. There are likely other methods as well, but those are the ones that come quickly to mind tonight.

Deleting several specific columns from a table [5]

I would like to delete several hundred columns from a table of data. But this goes on for several hundred lines which would take hours to run
Do you know all the column indices you want to delete? It’s as simple as. columnIndicesToDelete = [4 5 6 7 9 12 14 15 17]; % and so on
Or am I missing something? In your example, the columns deleted in the command. will not be the 5th and 6th column of the original array

How to delete rows/columns of a matrix in Embedded Matlab Fcn? [6]

How to delete rows/columns of a matrix in Embedded Matlab Fcn?. I’m trying to remove specific set of rows and columns of a matrix
You will need to start with a variable-size matrix, of course. Use coder.varsize to make any matrix that looks like a fixed-size matrix into a variable-sized one.
To do both rows and columns at once, I might rather write code like this. You will not be able to coax it into making that last assignment an in-place operation

delete zeros rows and columns [7]

I try this code to delete all row and column with all zero values in them. It simply works for deleting the columns with all zero values abut it does not work for rows! Can anybody please help me?
data( all( ~any( data), 2 ), : ) = []; % removes all rows with all zero. data( :, all( ~any( data ), 1 ) ) = []; % and columns
it doesnt need to be a full row if 0’s, just if one occour in a row/ column, but your code works perfect. I’m new to MATLAB, I want to delete the entire rows and columns which contain all of ones in a binary image.I want to keep rows and columns if that contain only single zero

Delete specific columns of a table [8]

I have a huge table (more than 30 columsn) and I would like to delete all columns except the ones that I determined.. Let’s say table columns names are: A, AB, TY, IU, OP, JH, KL, GF, DF, CV, MN, GF, QW
I’m not sure I understood your question corectly, but here is an example with a matrix with 30 columns and 5 rows with random numbers (as an example). only the 1st, 7th, 10 and 11th column — such that the new matrix contains only those 4 columns
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How to delete repeating column or duplicate column in MATLAB? of type Double [9]

How to delete repeating column or duplicate column in MATLAB? of type Double. How to delete the repeating or duplicate columns in matrix, is there any function in MATLAB?, for example in the input array row 2 are basically the occurance or row 1 values, so i am basically counting how many times that partiuclar value in row 1 has appeared in row 1.
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array and logicals; deleting columns [10]

Hi I am trying to delete a column of array based on a logical (true, false). I am trying to delete the entire column when its true (logical 1)
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How to delete the columns in a structure array [11]

I have a structure array HT (1 x 50000) with 20 fields. I want to delete the columns whose size is less than 10.
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Delete rows and columns of a matrix [12]

How can I arbitrary remove any given rows or columns? for example second row and third column of the above matrix?. Just assign the column or line to the empty matrix:
rand(1e4)) and on 10 runs where I delete 2 columns and 2 rows, the average times are 0.932ms for the empty-matrix assignment, and 0.905ms for the kept-row (or -column) assignment. So the gap seen there is not as big as 1.5x mentioned in the link
a = rand(10000); kr = true(size(a,1),1); kr([72,6144]) = false; % some rows to delete kc = true(1,size(a,2)); kc([1894,4512]) = false; % some columns to delete a = a(kr,kc);. On this test, it’s clearly twice faster than performing the suppression on rows and columns separately.

Matlab-Matrix – Deletion of Row & Column [13]

You can delete an entire row or column of a matrix by assigning an empty set of square braces [] to that row or column. For example, let us delete the fourth row of a, as shown below −
>> a = [ 1 2 3 4 5; 2 3 4 5 6; 3 4 5 6 7; 4 5 6 7 8] a( 4 , : ) = [] a = 1 2 3 4 5 2 3 4 5 6 3 4 5 6 7 4 5 6 7 8 a = 1 2 3 4 5 2 3 4 5 6 3 4 5 6 7 >>. Next, let us delete the fifth column of a, as shown below −
Let us see the execution of the above code in MATLAB −. >> a = [ 1 2 3 4 5; 2 3 4 5 6; 3 4 5 6 7; 4 5 6 7 8] a(: , 5)=[] a = 1 2 3 4 5 2 3 4 5 6 3 4 5 6 7 4 5 6 7 8 a = 1 2 3 4 2 3 4 5 3 4 5 6 4 5 6 7 >>

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Deleting Rows and Columns :: Matrices and Arrays (Getting Started) [14]

You can delete rows and columns from a matrix using just a pair of square brackets. If you delete a single element from a matrix, the result is not a matrix anymore

how to delete columns in matlab? [15]

– There are a few ways to delete columns in Matlab.. How to delete rows & columns from a matrix by using MATLAB
Open the MATLAB workspace for which you want to delete the column.. In MATLAB, you can clear a matrix by using the clear function.
To select different columns in MATLAB, use the “select” command.. To delete a row in a table in Matlab, you can use the delete command:

How To Delete ROW/COLUMN in MATLAB [16]

In previous post on matlab tutorial we have discussed about How to apply WHILE loop in MATLAB.. Now in Post-20 of Module-01, we will discuss about how to delete row/column in matlab, for which a matlab program has been given in figure-1.
This matrix is also displayed to the user for the selection purpose with the help of command written in line-4. Now user is asked to enter the row number and after that column number which he want to delete
Selected row is deleted with the help of command written in line-7 while selected column is deleted with the help of command written in line-8. After this updated matrix has been displayed with the help of command written in line-9

Matlab: How to remove column from matlab table? [17]

For instance if I want to delete the 3rd column, 4th column, 8th column, 14th column and 33 column. Solution 1: “Keep the columns where the difference is larger than zero” Solution 2: Both the posted answers are incorrect.
– How do I add and delete column-oriented variables in a table?. How to remove the column with all the same elements in matlab?
“Keep the columns where the difference is larger than zero”. A = [1 2 3; 2 3 3]; EDU>> A(:,any(diff(A,1,1),1)) ans = 1 2 2 3

Dive into anything [18]

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How do you remove all columns of zero in a three dimensional array?. So let’s say you have data that is 8 x 29 x 5 and you’ve found there are 5 columns that are all zeros

How to conditionally delete columns in a cell array [19]

How to conditionally delete columns in a cell array. input = {‘A’,’B’,’A’,’A’,’A’,’A’,’A’,’A’; ‘A’,’A’,’B’,’A’,’A’,’A’,’A’,’A’; ‘A’,’A’,’A’,’A’,’A’,’A’,’A’,’A’}
inputc = {‘A’,’B’,’A’,’A’,’A’,’A’,’A’,’A’; ‘A’,’A’,’B’,’A’,’A’,’A’,’A’,’A’; ‘A’,’A’,’A’,’A’,’A’,’A’,’A’,’A’};. isB = cell2mat(cellfun(@(x)ismember(‘B’,x), inputc, ‘Uni’,0));
If your cell array is indeed a cell array of single characters, then you’d be better off storing it as a char matrix:. Find more on Data Type Identification in Help Center and File Exchange

[Best answer]-deleting a column of matrice in matlab [20]

I want to delete columns of first matrix in which there is at least an element bigger than 5 or smaller than zero. then I want to delete that column from second matrix too.how is it possible?
In other words we want to keep columns where all alements fulfill. Cols=find(min(A) > 0 & max(A) < 5) % find columns newA=A(:,Cols); % pick columns of A newB=B(:,Cols); % pick columns of B
newA=A(:,min(A)>0 & max(A)<5); newB=A(:,min(A)>0 & max(A)<5);. Cols=min(A)>0 & max(A)<5; NewA=A(:,Cols); NewB=B(:,Cols);

FAQ-367 How do I delete every nth row or column from my worksheet? [21]

4.8 FAQ-367 How do I delete every nth row or column from my worksheet?. To delete columns, select Worksheet: Reduce Columns
Or, you can run script below in the Command Window directly to execute the abvove operation:. For example, set the dialog as screenshot below will delete every 4th row in the active workbook (delete 1 row and skip 3 rows, start from the 4th row)
With your worksheet active, open the Script Window (menu item: Window: Script Window), copy-paste the following lines of code, select all lines, and press Enter.. – With Worksheet active, select Edit: Select from main menu.

21 how to delete columns in matlab? Ultimate Guide
21 how to delete columns in matlab? Ultimate Guide

Sources

  1. https://www.mathworks.com/matlabcentral/answers/43672-deleting-certain-columns-in-a-matrix
  2. https://www.mathworks.com/matlabcentral/answers/276278-deleting-a-column-from-an-array
  3. https://www.mathworks.com/matlabcentral/answers/466858-how-to-eliminate-certain-columns-from-a-matrix
  4. https://www.mathworks.com/matlabcentral/answers/264600-how-do-i-delete-rows-and-columns-from-a-matrix
  5. https://www.mathworks.com/matlabcentral/answers/478099-deleting-several-specific-columns-from-a-table
  6. https://www.mathworks.com/matlabcentral/answers/81316-how-to-delete-rows-columns-of-a-matrix-in-embedded-matlab-fcn
  7. https://nl.mathworks.com/matlabcentral/answers/40018-delete-zeros-rows-and-columns
  8. https://www.mathworks.com/matlabcentral/answers/788249-delete-specific-columns-of-a-table
  9. https://www.mathworks.com/matlabcentral/answers/462716-how-to-delete-repeating-column-or-duplicate-column-in-matlab-of-type-double
  10. https://www.mathworks.com/matlabcentral/answers/552487-array-and-logicals-deleting-columns
  11. https://www.mathworks.com/matlabcentral/answers/507835-how-to-delete-the-columns-in-a-structure-array
  12. https://stackoverflow.com/questions/31725654/delete-rows-and-columns-of-a-matrix
  13. https://www.tutorialspoint.com/matlab_matrix/matlab_matrix_deletion_of_row_and_coloumn.htm
  14. http://matlab.izmiran.ru/help/techdoc/learn_matlab/ch3get17.html
  15. https://deletingsolutions.com/how-to-delete-columns-in-matlab/
  16. https://www.info4eee.com/2017/08/how-to-delete-rowcolumn-in-matlab.html
  17. https://copyprogramming.com/howto/how-to-remove-column-from-matlab-table
  18. https://www.reddit.com/r/matlab/comments/1095v2j/how_do_you_remove_all_columns_of_zero_in_a_three/
  19. https://ww2.mathworks.cn/matlabcentral/answers/521730-how-to-conditionally-delete-columns-in-a-cell-array
  20. https://www.appsloveworld.com/bestanswer/matlab/118/deleting-a-column-of-matrice-in-matlab
  21. https://www.originlab.com/doc/Quick-Help/del-every-nth-row-or-col

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