[Scilab-users] Running external program

[Lester Anderson]

Hello,

I have the windows version of Scilab (currently 5.4.1), but would like
to run an external program (e.g. gmt software) and return or use the
output in the Scilab code:

As a rough algorithm example (.sce):

//run the gmt program grdinfo.exe - extract data as single column z-matrix)

grd2xyz faa.grd -ZTLa > faa.txt

scilab: assign matrix output to variable for use in Scilab etc.

Any pointers would be helpful.

Lester

[selieff]

The command you want is 'dos':

dos('grd2xyz faa.grd -ZTLa > faa.txt')

If the command line is complex or needs to include names defined elsewhere,
it is sometimes helpful to use msprintf to create the string first

complex_command = msprintf(...)

and then issue it using the string variable

dos(complex_command,'-echo')

The '-echo' is optional but nice to see in the command window.

The resulting 'faa.txt' file from GMT can be read with whatever function
makes the most sense for the format (fscanfMat perhaps?).

Stefan

Post by Lester Anderson
Hello,
I have the windows version of Scilab (currently 5.4.1), but would like
to run an external program (e.g. gmt software) and return or use the
//run the gmt program grdinfo.exe - extract data as single column z-matrix)
grd2xyz faa.grd -ZTLa > faa.txt
scilab: assign matrix output to variable for use in Scilab etc.
Any pointers would be helpful.
Lester
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users mailing list
http://lists.scilab.org/mailman/listinfo/users

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[Stefan Elieff]

The command you want is 'dos':

dos('grd2xyz faa.grd -ZTLa > faa.txt')

If the command line is complex or needs to include names defined
elsewhere, it is sometimes helpful to use msprintf to create the string
first

complex_command = msprintf(...)

and then issue it using the string variable

dos(complex_command,'-echo')

The '-echo' is optional but nice to see in the command window.

The resulting 'faa.txt' file from GMT can be read with whatever function
makes the most sense for the format (fscanfMat perhaps?).

Stefan

Post by Lester Anderson
Hello,
I have the windows version of Scilab (currently 5.4.1), but would like
to run an external program (e.g. gmt software) and return or use the
//run the gmt program grdinfo.exe - extract data as single column z-matrix)
grd2xyz faa.grd -ZTLa > faa.txt
scilab: assign matrix output to variable for use in Scilab etc.
Any pointers would be helpful.
Lester
_______________________________________________
users mailing list
http://lists.scilab.org/mailman/listinfo/users

[Lester Anderson]

Hello Stefan,

Thanks for the pointers. I have tried with a small section of scripting:

// Test script to launch and process GMT commands
dos('grd2xyz FAA.grd -ZTLa -V > faa.txt','-echo') // works fine
dos('grdinfo FAA.grd','-echo') // works fine
dos('grdinfo FAA.grd -C | gawk "{nx=$10; ny=$11}; {print nx, ny}" >
nxy.txt','-echo') // error

The third line fails with an error (gawk is in the PATH), perhas due
to the piping (|) or some other issue:

dos('grdinfo FAA.grd -C | gawk "{nx=$10; ny=$11}; {print nx, ny}" >
nxy.txt','-echo')
!--error 3
Waiting for right parenthesis.
at line 4 of exec file called by :
exec('C:\SS20-work\FAA_EAfrica\test_faa.sce', -1)

Are there limitations with this route?

Thanks
Lester

Post by selieff
dos('grd2xyz faa.grd -ZTLa > faa.txt')
If the command line is complex or needs to include names defined elsewhere,
it is sometimes helpful to use msprintf to create the string first
complex_command = msprintf(...)
and then issue it using the string variable
dos(complex_command,'-echo')
The '-echo' is optional but nice to see in the command window.
The resulting 'faa.txt' file from GMT can be read with whatever function
makes the most sense for the format (fscanfMat perhaps?).
Stefan

Post by Lester Anderson
Hello,
I have the windows version of Scilab (currently 5.4.1), but would like
to run an external program (e.g. gmt software) and return or use the
//run the gmt program grdinfo.exe - extract data as single column z-matrix)
grd2xyz faa.grd -ZTLa > faa.txt
scilab: assign matrix output to variable for use in Scilab etc.
Any pointers would be helpful.
Lester
_______________________________________________
users mailing list
http://lists.scilab.org/mailman/listinfo/users

_______________________________________________
users mailing list
http://lists.scilab.org/mailman/listinfo/users

[Dang Ngoc Chan, Christophe]

Hello,

De : Lester Anderson
Envoyé : jeudi 3 décembre 2015 16:56
dos('grdinfo FAA.grd -C | gawk "{nx=$10; ny=$11}; {print nx, ny}" >
nxy.txt','-echo')
!--error 3 Waiting for right parenthesis.

In some cases, you need to use two quotes to tell that you want the character quote and that it is not the end of the string.

Don't know if it applies here, but maybe you could try.

--
Christophe Dang Ngoc Chan
Mechanical calculation engineer
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[Samuel Gougeon]

Post by Lester Anderson
Hello,

De : Lester Anderson
Envoyé : jeudi 3 décembre 2015 16:56
dos('grdinfo FAA.grd -C | gawk "{nx=$10; ny=$11}; {print nx, ny}" >
nxy.txt','-echo')
!--error 3 Waiting for right parenthesis.

In some cases, you need to use two quotes to tell that you want the character quote and that it is not the end of the string.
Don't know if it applies here, but maybe you could try.

Yes indeed, it is clearly a problem here. In Scilab 5, a string started
with " can be terminated with ' , and vice-versa. This tolerance is no
longer accepted with Scilab 6.
So here,

dos('grdinfo FAA.grd -C | gawk ""{nx=$10; ny=$11}; {print nx, ny}"" > nxy.txt','-echo')
must be used.

Samuel Gougeon

[Lester Anderson]

Thanks Samuel for the clarification. Adding the double quotes worked
fine. Will this work with single quotes in v6 as in the original
syntax?

Post by Lester Anderson
Hello,

De : Lester Anderson
Envoyé : jeudi 3 décembre 2015 16:56
dos('grdinfo FAA.grd -C | gawk "{nx=$10; ny=$11}; {print nx, ny}" >
nxy.txt','-echo')
!--error 3 Waiting for right parenthesis.

In some cases, you need to use two quotes to tell that you want the
character quote and that it is not the end of the string.
Don't know if it applies here, but maybe you could try.

Yes indeed, it is clearly a problem here. In Scilab 5, a string started with
" can be terminated with ' , and vice-versa. This tolerance is no longer
accepted with Scilab 6.
So here,
dos('grdinfo FAA.grd -C | gawk ""{nx=$10; ny=$11}; {print nx, ny}"" > nxy.txt','-echo')
must be used.
Samuel Gougeon
_______________________________________________
users mailing list
http://lists.scilab.org/mailman/listinfo/users

[Samuel Gougeon]

Post by Lester Anderson
Thanks Samuel for the clarification. Adding the double quotes worked
fine. Will this work with single quotes in v6 as in the original
syntax?

For the moment, 6.0 does not support inner simple unprotected ' or ",
but IMO it should, like in the PHP language.
Report just posted for that: http://bugzilla.scilab.org/14287

Samuel