How to remove a value from matrix with same values in different positon?
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Pandiyaraj Gnanasekar on 7 Dec 2019
Hi everyone. I have 3x3 matrix of
T = [7,8,8 ; 6,4,10 ; 12,8,7]
I want to remove seven at first row and first column and not the other 7 in the last row and last column. How to remove it and same will apply for 8 also. I used indexing as T(T==7) = NaN; but it removes both values as the condition implies. Kindly please help with this. Thanks in advance.
Roshni Garnayak on 13 Dec 2019
You can obtain the indices of the first occurrence of each value in a matrix using the ‘unique’ function. Refer to the following link for details on how to use ‘unique’:
After you obtain the indices you can find the indices which have duplicate values by using the ‘ismember’ function. Refer to the link below:
Refer to the code below to obtain your functionality:
T = [7,8,8 ; 6,4,10 ; 12,8,7];
[C, ia] = unique(T, 'first');
x = 1:numel(T);
[lic, lob] = ismember(x, ia);
T(x(~lic)) = NaN;