generate unique random matrix using key

2013 8 11
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i want to get a key(integers/character/string) from the user and generate a random matrix using that key and particular to that key only. meaning if i again use that key for generating a matrix i would get similar matrix.matrix should be having unit8 values less than 256.

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Jan
Jan 2013-8-12
How large is the key and the matrix?
vardhit
vardhit 2013-8-12
matrix can be as large as an image matrix can be.. i really dont have any idea about key..but if u ask me about the sample space of key.i want it to be from integer 1-100.or even a string.

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Azzi Abdelmalek
Azzi Abdelmalek 2013-8-11
编辑：Azzi Abdelmalek 2013-8-11

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key=3 % for example
rng(key)
out=uint8(randi([0 255],2,4) % matrix 2x4

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vardhit
vardhit 2013-8-11
what is rng? its undefined in matlab.
vardhit
vardhit 2013-8-11
??? Undefined function or method 'rng' for input arguments of type 'double'. it gives an error
Azzi Abdelmalek
Azzi Abdelmalek 2013-8-11
In Matlab windows command, type
which rng
What did you get?
Azzi Abdelmalek
Azzi Abdelmalek 2013-8-11
I don't know if it's due to the version of your Matlab, or there is another problem. Maybe you should contact Mathworks technical support
Walter Roberson
Walter Roberson 2013-8-12
编辑：Walter Roberson 2013-8-12
rng is only defined in later versions of MATLAB. see http://www.mathworks.com/help/matlab/ref/randstream.html

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