[R] numeric index of a matrix column name ?

From: <vincent_at_7d4.com>
Date: Sat 29 Oct 2005 - 00:50:19 EST


Dear All,

I have written the following small code in order to return the numeric index of a given matrix column ascii name. It works, but there is perhaps/probably a predefined function which does that ?
If yes, thanks for pointing me to it.

# input : a matrix M and a column ascii name
# output : the numeric index of the column
colnameindex = function(M , colname0)
{
colsnames = names(M[1,]);
theindex = which(colsnames==colname0);
return(theindex);
}

Thanks
Vincent



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