Displaying 2 results from an estimated 2 matches for "500x3".
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5003
2007 Sep 27
1
A matrix multiplication
Dear all,
I'm having trouble using the 'apply' function to multiply some
arrays. Let A be a 500x2 array and B a 500x3 array. I need a vector C
which has 6 columns being the first three the result of A[,1] * B and
the second three the result of A[,2] * B. What is the most efficient way
to express that? I'm trying to use 'apply' with no success...
Thanks for your help!
--...
2008 Aug 06
1
using acf() for multiple columns
Hi everyone,
I'm trying to use the acf() function to calculate the autocorrelation of
each column in a matrix. The trouble is that I can only seem to get the
function to work if I extract the data in the column into a separate matrix
and then apply the acf() function to this column.
I have something like this: acf(mat,lag.max=10,na.action=na.pass)
...but I would really like to apply the