Equivalent to matlab ".*" operator in R

When your matrices are the same size, the "*" operator does what you want. The problem is that you have to make a conforming version of z before you can use that operator.

y*matrix(rep(z,3),ncol=2,byrow=TRUE)

or

y*matrix(rep(z,each=3),ncol=2)

To interpret this, just keep in mind that matrices are folded vectors in R... every matrix can be thought of as a linear vector of columnwise data with dimension attributes.

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On November 19, 2014 6:43:55 AM PST, "Ruima E." <ruimaximo at gmail.com> wrote:

Thank you Chel Hee.

Isn't there a simpler way to do so?


On Wed, Nov 19, 2014 at 3:35 PM, Chel Hee Lee <chl948 at mail.usask.ca>
wrote:

y = matrix(cbind(c(0, 0.5, 1),c(0, 0.5, 1)),ncol=2)
z = matrix(c(12, -6),ncol=2)
t(apply(y, 1, function(x) x*z))

    [,1] [,2]
[1,]    0    0
[2,]    6   -3
[3,]   12   -6

I hope this helps.

Chel Hee Lee

On 14-11-19 08:22 AM, Ruima E. wrote:

Hi,

I have this:

y = matrix(cbind(c(0, 0.5, 1),c(0, 0.5, 1)),ncol=2)
z = matrix(c(12, -6),ncol=2)

In matlab I would do this

y .* x

I would get this in matlab

ans

0    -0
6    -3
12   -6

What is the equivalent in R?

Thanks

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