[R] Matrix variable in C code

[Gabor Csardi]

On Thu, Feb 02, 2006 at 06:27:47PM +0100, depire at inrets.fr wrote:
[...]

The problem is that as.double drops the dim attribute:
> b <- matrix( 1:4, 2, 2)
> b
     [,1] [,2]
[1,]    1    3
[2,]    2    4
> as.double(b)
[1] 1 2 3 4
> 

You can try: 

> b <- matrix( 1:4, 2, 2)
> d <- dim(b)
> b <- as.double(b)
> b
[1] 1 2 3 4
> dim(b) <- d
> b
     [,1] [,2]
[1,]    1    3
[2,]    2    4

Another thing is that i cannot really see why the ZT parameter of the .Call
should be a matrix anyway. It's just the vector (40 21 30 20). Or am i
missing something?

Also, this is an unrelated issue but your VPCEfron C function takes five
parameters and the R code provides six....

Gabor

> =====================================
> 
> You can save these two simple programs in order to test my code.
> 
> Thanks.
> 
[...]

-- 
Csardi Gabor <csardi at rmki.kfki.hu>    MTA RMKI, ELTE TTK