Fill matrix with random letters and numbers

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Frank
Frank 2011-8-10
In MATLAB,I need to create a 36 by 20 matrix and then fill column by column, with a randomized selection from the characters A through Z and 0 through 9.
So each column will have the same characters but in a randomized order.
Your hints and suggestions are welcome.
Thank you.

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Fangjun Jiang
Fangjun Jiang 2011-8-10
A9=['A':'Z' '0':'9';];
Data=zeros(length(A9),20);
for k=1:size(Data,2)
Data(:,k)=randperm(length(A9));
end
Data=A9(Data)
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Paulo Silva
Paulo Silva 2011-8-12
No problem Frank, just in case you don't need the excel file you can just save the variable Data to a mat file
save('MyData','Data')
and load it when you need to use it
load('MyData')
the variable appears again on your workspace with the same name and contents.

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