select a random number from each row in a matrix with changable columns

hello, i want to create a matrix with 256 rows and random number of columns then i want to select randomly one number from each row and display all chosen numbers from all rows in one array

Answer 1

[KSSV]

rows = 256 ; 
cols = randsample(rows,1) ; 
A = rand(rows,cols) ; 
% Select a row randomly 
idx = randsample(rows,1) ; 
A(idx,:)

[Nahed Mahmoud]

thanks , but i want to select one number from each row

[KSSV]

Okay..you can do that...use randsample.

Answer 2

[madhan ravi]

arrayfun(@(x)a(x,randi(size(a,2))),1:size(a,1)).' % a your matrix