How to select the column of matrix?

I have a 10*5 matrix, say A.

I calculate vecnorm, B=vecnorm(A), which gives me values of norm-2 of each column, of order (1*5)

Now I have to select that particular column which highest value of vecnorm. Final matrix will be thus 10*1.

Answer 1

[Star Strider]

Try this —

M = randn(10,5)                                         % Create Matrix

M = 10×5

-2.4914 -0.9224 0.4424 0.0403 0.2552 0.0438 1.7929 1.4369 -0.1068 0.4421 -1.0425 -1.6377 -0.0228 -0.7257 0.2237 -2.4847 0.1353 1.3723 -0.3405 -0.4301 1.1223 0.2980 -0.6060 0.6482 -0.8294 -0.3723 0.1228 0.0323 -1.3601 -2.4858 -0.7934 -1.5298 1.0757 -0.4600 -1.3015 -1.1643 -0.5968 -0.2552 0.1067 0.2075 -0.9318 3.4273 1.2028 1.4698 -0.7706 0.9572 -1.9723 0.5205 -0.1401 -0.0858

Mv = vecnorm(M)

Mv = 1×5

4.3171 5.0202 2.7300 2.3084 3.1146

[mxMv,col] = max(Mv)

mxMv = 5.0202

col = 2

Desired_Output = M(:,col)

Desired_Output = 10×1

-0.9224 1.7929 -1.6377 0.1353 0.2980 0.1228 -1.5298 -0.5968 3.4273 -1.9723

.

[Chetan Fadnis]

thanks.

[Star Strider]

As always, my pleasure!