randomly selection

 i have 1e4 integer number from 1 to 1e4.how can i choose randomly any of these numbers each time?these 1e4 numbers are output of a code by this format X(1,i)and i=1 to 1e4 .now i want to select randomly one vector.

[Krishna Kumar]

what do you want exactly- a random permutation of the set of values or one value among them?

Answer 1

[Krishna Kumar]

 Do you have those values in a vector. If so, you can do like this-
random_chosen=V(randi([min(V) max(V)],1);
V=vector_of_integers.

[milad babaei]

yes.my outputs are like this X(1,i)and i=1 to 1e4...and each vector contains a number .for example X(1,1)=2.4 and X(1,2)=230 ....X(1,1e4)=13.7...now i want to pick up randomly 1e4 vectors each time.(not in order)

[Krishna Kumar]

Is bobrov's answer not working for you

[milad babaei]

this is my main problem.

http://mathworks.com/matlabcentral/answers/10043-calling-random-variables-and-using-them-in-a-loop

would u please help me ??

Answer 2

[Andrei Bobrov]

1.

randi(1e4)

2. variant

X = randi(1e4,1,1e4);
% rendom index (idx) of vector X, length of vector Xout - 300
idx = randperm(1e4);
Xout = X(idx(1:300))

EDIT

 doc rand 
 doc randi
 doc randn
 ...

example

 X = (b-a)*rand(1,1e4)+a;
 % 'a' and 'b' interval random numbers

Matrix 'X1e4' [1e4x1e4] - 1e4 vectors (lines) with 1e4 elements

 X1e4 = (b-a)*rand(1e4,1e4)+a;