Random data selection from a matrix

How can i select 5 datasample from the matrix

             Z=[43;-57;98;23;-13;243;-98;112;325;560]

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/16153-is-deleting-threads-helpful-in-this-forum

Answer 1

[Image Analyst]

Try this:

Z=[43;-57;98;23;-13;243;-98;112;325;560]
elementsToExtract = randperm(numel(Z), 5)
z5 = Z(elementsToExtract)

[Tinkul]

Sorry sir,i gives error.In the command window it shows the following error:

??? Error using ==> randperm Too many input arguments.

Error in ==> Untitled at 5 elementsToExtract = randperm(numel(Z), 5);

[Image Analyst]

You must have a really old version of MATLAB. What version/release do you have? You can extract the 5 yourself:

Z=[43;-57;98;23;-13;243;-98;112;325;560]
elementsToExtract = randperm(numel(Z))
z5 = Z(elementsToExtract(1:5))

[Tinkul]

Thanx sir. Now its working...I have matlab 7.8.0(R2009a) version...