I have a matrix A=[1 2 3; 1 2 9; 2 3 4]. I want a matrix B whose column 1 is equal to 1. How can I do this? B=[1 2 3; 1 2 9]
MATLAB: I have a matrix A=[1 2 3; 1 2 9; 2 3 4]. I want a matrix B whose column 1 is equal to 1. How to do this? B=[1 2 3; 1 2 9]
matrix
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Try this. It uses the formula 
n = input('Input n: ');a = ceil((-1+sqrt(1+8*n))/2);y = ((a-1)*a/2+1):(a*(a+1)/2);disp(y)I have no idea what your data is, but to generate the matrix in the question try:
out = unique(nchoosek([1:3, 1:3], 2), 'rows');Related Question
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