MATLAB: How to extract random elements from an array

array

For eg., I have a 1d array, d=[1;3;4;6;8;7;8;9;6;7] and I need to extract the first, third and sixth variable. How do I do that?

Best Answer

d([1 3 6])

If you want 3 at random then,

d( randperm(length(d),3) )

Related Solutions

MATLAB: Do a matrix,array

This works:

B = reshape(A', 1, []);

MATLAB: 2D array

Use squeeze(). This works fine for me:

s3D = rand(4,3,2)
s2D = squeeze(s3D(2,:,:))
s3D(:,:,1) =
  0.5103    0.0183    0.1749
  0.6590    0.7794    0.2998
  0.8773    0.6623    0.7778
  0.0790    0.9458    0.6653
s3D(:,:,2) =
  0.2475    0.0516    0.3926
  0.7406    0.1848    0.6212
  0.0042    0.7256    0.4685
  0.5316    0.3404    0.1957
s2D =
  0.6590    0.7406
  0.7794    0.1848
  0.2998    0.6212

You can see that it took row 2 out of the first plane, and row 2 out of the second plane, and gave you a 3 by 2 array, just what it should have.

Best Answer

Related Solutions

MATLAB: Do a matrix,array

MATLAB: 2D array

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