| Calling Matlab engine from IDL, [message #38670] |
Wed, 24 March 2004 09:21 |
Lars G. Hanson
Messages: 2
Registered: June 1999
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Junior Member |
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In order to make use of a library of Matlab-functions from IDL, I
attempted to use freely available software located at
http://hendrix.imm.dtu.dk/software/atlant/atlant.html for spawning a
matlab engine by call_external (interface written by Finn Aarup
Nielsen and Peter Toft).
After minor adaptions to matlab 6.5 (given below), Finns and Peters
code works very nicely UNTIL the first IDL graph is plotted. After
that it seems impossible to get data back from Matlab via
call_external. If IDL graphics has been used at any time in an IDL
session, it is impossible to get the matlab session running at all.
Until now, I would have thought that call_external and graphics were
independent, but no. I'm running Matlab IDL 5.4, Matlab 6.5, Redhat 9.
Even though Finn and Peter wrote the code for earlier versions of IDL
and Matlab, they experienced the same problem (SGI platform).
Any ideas on cause or solution?
Cheers,
Lars, larsh#drcmr.dk
----------------------
Below were the changes needed to make idl2mat work
diff idl2mat.c idl2mat.c.orig
159,160c159,160
< // if (debug) printf("%s (Matlabput) Setting name: %s\n", filename, pString);
< // mxSetName(pMat, pString); Obsolete.
---
> if (debug) printf("%s (Matlabput) Setting name: %s\n", filename, pString);
> mxSetName(pMat, pString);
163,164c163
< // engPutArray(ep, pMat); //Obsolete.
< engPutVariable(ep, pString, pMat);
---
> engPutArray(ep, pMat);
224,225c223
< // if (!(pMat = engGetArray(ep, pString))) { //Obsolete.
< if (!(pMat = engGetVariable(ep, pString))) {
---
> if (!(pMat = engGetArray(ep, pString))) {
276,277c274
< // pMat = engGetArray(ep, pString); //Obsolete.
< pMat = engGetVariable(ep, pString);
---
> pMat = engGetArray(ep, pString);
325,327d321
< if (debug) printf("(Matlabeval) Evaluating string: %s\n", pString);
<
< engOutputBuffer(ep, NULL, 0); //Disable output to avoid segmentation error.
diff Makefile Makefile.orig
< #ARCH = lnx86
< ARCH = glnx86
---
32,36c30
< # -lmi removed.
< LFLAGS = -lm -shared -L$(MATLAB)/extern/lib/$(ARCH) -leng -lmx -lmat -lut
<
< #From idl_5.4/external/call_external/C/callext_unix.txt:
< FFLAGS = -fPIC
---
> LFLAGS = -lm -shared -L$(MATLAB)/extern/lib/$(ARCH) -leng -lmx -lmat -lmi -lut
41c35
< $(CC) -o $(EXE) $(OBJS) $(LFLAGS) $(FFLAGS)
---
> $(CC) -o $(EXE) $(OBJS) $(LFLAGS)
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