Error during matrix multiplication

You need to learn to use the str() function to debug these kinds of problems. And you need to learn to provide data with your code (perhaps with the dput function) so others can reproduce your problem if you want help.

I would guess that you have non-numeric data in your files.
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                                      Live:   OO#.. Dead: OO#..  Playing
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Sent from my phone. Please excuse my brevity.

Hi,
I have two matrix from two different .csv files.

#load .csv files
a <- as.matrix(read.table("Whirr_127.csv", header=T, sep=",",
row.names=1))
b <- as.matrix(read.table("Files_Whirr_127.csv", header=T, sep=",",
row.names=1))
a
b

I managed to do transpose to 'b' without any error.

transpose_task <- t(b)
transpose_task

But, when I tried to do multiplication (a%*%transpose_task), an error
occured.

td <- (a%*%transpose_task)
td

Here is the error:
ERROR:  requires numeric/complex matrix/vector arguments
ERROR:  object 'td' not found

Anybody can help me to solve this?

Thank you

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