Hi all,

Jonathan very kindly helped me with dramatically improve my raster algebra
performance (an earlier post).

I have another bottle-neck now, for which I was hoping that someone may
have a solution.

The stack() function takes a long time, so I moved to the quickStack
function suggested on
http://stackoverflow.com/questions/9929324/increase-performance-speed.

Changing the raster stack to a matrix using the values() function is now
the bottleneck.

Does anyone know if it is possible to read a series of rasters directly
into a matrix and thereby drop the values() step?

I have been trying to take a look at the code for the stack() function, but
can't seem to see it. How does one view the function code - or is it
written in C? And how does one figure that out?

An example of the code would be:

in <- stack(list.files("E:\Temp"))
v <- values(in)

Thanks very much for any help in advance.
Cheers,
Alastair

-- 
Dr. Alastair J. Potts
Claude Leon Postdoctoral Fellow
Botany Department
Nelson Mandela Metropolitan University

Cell #: 082 491-7275
Office #: 041 504-2398 (Tues, Thurs, Fri)
Fax #: 086 686-4251

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