[GRASS-user] matlab scripts r.dominant_dir.m and r.calc_terraflow_dir.m

GRASS GRASS user
1

I'm looking to use the addon scripts r.dominant_dir.m and
r.calc_terraflow_dir.m, however, I have never used Matlab or Freemat.
I looked around for some examples or documentation on how to run these
scripts for (in?) GRASS, but have not found anything helpful.

Can someone point me to a good resource to learn about this?

Thanks,
Mark

2

Mark:

I'm looking to use the addon scripts r.dominant_dir.m and
r.calc_terraflow_dir.m, however, I have never used Matlab
or Freemat.
I looked around for some examples or documentation on how
to run these scripts for (in?) GRASS, but have not found anything
helpful.

Can someone point me to a good resource to learn about
this?

I am not sure how useful those scripts are, they were mostly the result
of me exploring some code. but who knows maybe you have a good use for
them.

Octave is another GPL'd matlab clone.

without looking how they work I'd guess r.out.mat was used to save
a .mat file which octave could then load. ?
the .m script is run by typing the name without the .m from the matlab
command prompt.

if you are still stuck I can try to find a little time to document
them better.

Hamish

3

Thank you for the info. I wound up installing GRASS65 and using MFD
in r.watershed. I was looking to those scripts to use MFD in GRASS64.

So, in short, I'm good to go.

Much thanks,
Mark

On Wed, Nov 18, 2009 at 4:52 AM, Hamish <hamish_b@yahoo.com> wrote:

Mark:

I'm looking to use the addon scripts r.dominant_dir.m and
r.calc_terraflow_dir.m, however, I have never used Matlab
or Freemat.
I looked around for some examples or documentation on how
to run these scripts for (in?) GRASS, but have not found anything
helpful.

Can someone point me to a good resource to learn about
this?

I am not sure how useful those scripts are, they were mostly the result
of me exploring some code. but who knows maybe you have a good use for
them.

Octave is another GPL'd matlab clone.

without looking how they work I'd guess r.out.mat was used to save
a .mat file which octave could then load. ?
the .m script is run by typing the name without the .m from the matlab
command prompt.

if you are still stuck I can try to find a little time to document
them better.

Hamish

4

Mark:

So, in short, I'm good to go.

good.

fwiw I added a couple USAGE lines to the header comments in
those scripts.
In matlab parlance a "!" at the start of the line is similar
to doing system().

Hamish