[R] replacing values in a matrix or data.frame

[assuncao.senra@portugalmail.com]

Hi,

I have a matrix where I want to replace the entries of each column by the 
proportion value of the times each entrie appears in that column, that is, In 
each column there 4 to 10 repeated values, for wich i can compute frequencies 
in the respective column, and then i want to replace each value for its 
respective frequencie in another matrix. Can someone help me?

Thanks for all the help.
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