Thread Subject: c coded interp3

I'm working on large 3D data sets and i need to interpolate
data on some regular grid. With interp3, my computer hangs
because of vectorized nature of interp3. I tired to use
interp3 in a loop to avoid more memory need but it is stil
too slow. So i have to code interp3 in c or c++ but
unfortunately i'm not good at that language. If anyone has
mex format of interp3 or again a mex format of a trilinear
interpolation function?

> my computer hangs
> because of vectorized nature of interp3.

Why do you think vectorization is the cause?

Would partitioning the data into overlapping cubes help you?

How do you plan to reduce the memory required by coding in C/C++?
(Other than reading the data in sequentiall, since this can be done in
MATLAB itself)


On Thu, 28 Feb 2008 03:01:05 -0500, Mehmet OZTURK
<mehmetozturk@mathworks.com> wrote:

> I'm working on large 3D data sets and i need to interpolate
> data on some regular grid. With interp3, my computer hangs
> because of vectorized nature of interp3. I tired to use
> interp3 in a loop to avoid more memory need but it is stil
> too slow. So i have to code interp3 in c or c++ but
> unfortunately i'm not good at that language. If anyone has
> mex format of interp3 or again a mex format of a trilinear
> interpolation function?

I think vectorized interp3 reads all data in double format
and causes memory error. I tried to read data in a format of
sequantial planes instaed of overlapping cubes. This method
is also as slow as reading data in sequential vectores.
Anyway, i plan to use interp3 in a loop but to avoid
overhead time consumed by interp3.