combination command

2011 11 27

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hi,

is there command compute combination ,for example comp. 4 of 20

thanks

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Jan 2011-11-27

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What is the expected output? The number of combinations or a matrix of combinations itself? Do you want repetitions or not?

For some of these questions nchoosek is the needed function. For the others you find several tools in the FEX.

huda nawaf 2011-11-27

thanks ,

nchoosek what I need , but need to see the cominations

ex. comb. 2 of 3

abc

ab,cb,ac

also, I need permutation command

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