How do I remove any Column in a matrix
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Please what is wrong with this function. I want it to remove 'n' column form the matrix A
function B = column_removal(A,n)
A1= A(:,1:n-1) % Index from column 1 to column 'n-1'
A2 = A(:,n+1:end) % Index from column 'n+1' to the last co1umn
B = [A1 A2] % concatenate A1 & A2 by which the n column would have been removed
end
4 Comments
Accepted Answer
Matt J
on 14 Jan 2021
Edited: Matt J
on 14 Jan 2021
Nothing is wrong with the code you've posted, but it would be simpler to do,
B=A(:,[1:n-1,n+1:end]);
or, slightly less efficiently,
B=A;
B(:,n)=[];
8 Comments
Image Analyst
on 14 Jan 2021
And Walter of course!
You can accept the Answer below to give ercan "credit" for helping you in terms of "reputation points". Thanks in advance.
More Answers (1)
ercan duzgun
on 14 Jan 2021
Dear Cutie,
Your MATLAB function already works fine. However, Matt J's solution is simpler.
I checked your MATLAB function by this example below, and I received the expected result.
X=[1 2 3 4 5 6; 10 20 30 40 5 60;100 200 300 400 500 600]
column_removal(X,3)
A1 =
1 2
10 20
100 200
A2 =
4 5 6
40 5 60
400 500 600
ans =
1 2 4 5 6
10 20 40 5 60
100 200 400 500 600
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