f2matlab

Converts basic fortran90 source code to MATLAB source code.

Description

4. F2MATLAB CAPABILITIES: f2matlab is aimed at converting numerical Fortran90 code to Matlab m-files. Accordingly, only basic data types and constructions are recommended. f2matlab can handle: all numeric types (handled by Matlab interpreter) most string functions comparisons, branches, loops, types, etc. basic read/write/print statements (if it's not too fancy...) 5. F2MATLAB LIMITATIONS: f2matlab can not handle some features of fortran90 yet. These include: can't handle difficult IO and read and write statements, goto (of course), equivalence, and pointers.

• Acknowledgements: This submission has inspired the following:; GaussHermite
• MATLAB release: MATLAB 7 (R14)

[shahab ghomi]

 

[peter spellucci]

 

[Malin Premaratne]

This is a very useful function

[Anthony Kendall]

Though it's not perfect (because of the ambiguity of the GOTO, READ, and WRITE functions in FORTRAN, they don't convert correctly), this converted about 1000 lines of code for me that I was then able to debug and convert to MATLAB format in about 8 hours. Not bad, considering the code was written by someone else!

[Thomas Clark]

The actual utility is really useful... When it works.
However, (I think due to the ambiguity between row and column vectors in Fortran) I found a lot of problems in translation, where it just ground to a halt.

In a sense that's to be expected; but there is almost no error handling to cope with that kind of situation- If I could just find out which line of the source code was causing the trouble, I'd be able to comment that section out in the F90 file and manually translate those particular lines. As the f2matlab code is largely uncommented it's havoc to try and trace which lines of code cause the translation problem.

Don't get me wrong; this can be extremely useful code - and clearly a lot of effort has gone into it's development. However, it needs to be a bit more transparent to help us get over the patches where the ambiguity of Fortran lets the translation down.

[aws ataallah]

 

[rakesh reddy govindapur]

good work

[thangjam singh]

very good

[Fat Hidalgo]

I tried to run the code but I keep getting the error:

??? Input argument "filename" is undefined.

Error in ==> f2matlab at 101
 if exist(filename,'file')==2

I think this is because Matlab does not like when functions are defined in the script. I should define the function outside of the script in a separate .m file, but when I try to do so, I just get more errors. It's hard for to to see what I need to cut from the original program to define the function separately. Anybody with comments on this please email me.

[anonymous anonymous]

Hello
I have tried to convert the where statement applied to a 2D array to matlab and it seems f2matlab does not translate well.
Best Regards
Eduardo

program ed_example
   integer B(10, 2)

   B(1:10, 1) = 0
   B(1:10, 2) = 1
   where (B(:,:)>0)
      B(:,:) = B(:,:) + 9
   endwhere
end program

 Translating:
f2matlab('ed_example.f')

ans =
b([1:10], 1) = 0;
b([1:10], 2) = 1;
fmask=(b(:,:)>0);
b(fmask,:) = b(fmask,:) + 9;
endwhere;

Running:
>> b(fmask,:) = b(fmask,:) + 9
??? Index exceeds matrix dimensions.

[Qun HAN]

It's great to know this great tool is still imporved.

[Martin Richard]

Very useful package indeed. Thank you.

[Hastiepen]

I know nothing about Fortran, and had to convert some code into Matlab. The conversions that f2matlab made helped me immensely to give me a starting point. Many thanks!

[Andre Guy Tranquille]

 

[pink]

how to use it, can be given one example of step by step process of using f2matlab

[Erkan Tiryaki]

it would be great if I could fix the error points with a guide..

[Alan]

Hi,

How do I install f2matlab on Vista? I cannot get the "INSTALL" file to execute, there is no 'Run' command when I right-click on it.

Thanks,

[Md mahbub Mishu]

I am using this f2matlab file but when I call the function to convert my fortran90 code to .m file, it says "bad cell reference"
I am giving my fortran code below:
C
C RANKINE SOURCE WAVES TRANSFERRED TO FORM KELVIN ANGLE
C (UNIT STRENGTH, UNIT VOLUME)
      DIMENSION FSPANL(20,40), FSP2(30,50),
     + A(40,20),B(40,20),H(40,20),
     + AK(40,20),BK(40,20),HK(40,20)
      DATA IR,DEPTH/20,20.0/
C
C
C
      DO 100 I=1,20
      DO 100 J=1,40
  100 FSPANL(I,J)=0.0
C
C
C
      DELTAR=20.0/FLOAT(IR)
      DO 200 I1=1,IR
      R=DELTAR*FLOAT(I1)
      RK=DELTAR*FLOAT(I1)+0.5
      THETA=2.0*3.141592/FLOAT(I1*4)
      ITHETA=I1*4
      DO 300 I2=1,ITHETA
      ANGLE=THETA*FLOAT(I2-1)
      A(I2,I1)=R*COS(ANGLE)
      AK(I2,I1)=RK*COS(ANGLE)
      B(I2,I1)=R*SIN(ANGLE)
      BK(I2,I1)=RK*SIN(ANGLE)
  300 CONTINUE
C
      DO 350 I2=1,ITHETA
      R3D=SQRT((A(I2,I1)-A(1,I1))**2+(B(I2,I1)-B(1,I1))**2+DEPTH**2)
      R3DK=SQRT((AK(I2,I1)-AK(1,I1))**2
     + +(BK(I2,I1)-BK(1,I1))**2+DEPTH**2)
      H(I2,I1)=R3D**2/(2.0*9.81*(R3D**3))
      HK(I2,I1)=-R3DK**2/(2.0*9.81*(R3DK**3))
  350 CONTINUE
C
      DO 360 I2=1,ITHETA
      A(I2,I1)=A(I2,I1)+3.0*R
      AK(I2,I1)=AK(I2,I1)+3.0*R
      B(I2,I1)=B(I2,I1)+10.0
      BK(I2,I1)=BK(I2,I1)+10.0
  360 CONTINUE
C
C
C
      DO 1000 I2=1,ITHETA
C
      I=1
      J=1
      ICOUNT=1
      COL=1.0
      IF (A(I2,I1).GT.40.0) GO TO 910
  400 IF (A(I2,I1).GT.COL) GO TO 500
      J=ICOUNT
      GO TO 600
  500 COL=COL+1.0
      ICOUNT=ICOUNT+1
      GO TO 400
  600 CONTINUE
C
      ICOUNT=1
      ROW=1.0
      IF (B(I2,I1).GT.20.0) GO TO 910
      IF (B(I2,I1).LT.0.0) GO TO 910
  700 IF (B(I2,I1).GT.ROW) GO TO 800
      I=ICOUNT
      GO TO 900
  800 ROW=ROW+1.0
      ICOUNT=ICOUNT+1
      GO TO 700
C
  910 H(I2,I1)=0.0
  900 FSPANL(I,J)=FSPANL(I,J)+H(I2,I1)
C
      I=1
      J=1
      ICOUNT=1
      COL=1.0
      IF (AK(I2,I1).GT.40.0) GO TO 915
  405 IF (AK(I2,I1).GT.COL) GO TO 505
      J=ICOUNT
      GO TO 605
  505 COL=COL+1.0
      ICOUNT=ICOUNT+1
      GO TO 405
  605 CONTINUE
C
      ICOUNT=1
      ROW=1.0
      IF (BK(I2,I1).GT.20.0) GO TO 915
      IF (BK(I2,I1).LT.0.0) GO TO 915
  705 IF (BK(I2,I1).GT.ROW) GO TO 805
      I=ICOUNT
      GO TO 905
  805 ROW=ROW+1.0
      ICOUNT=ICOUNT+1
      GO TO 705
C
  915 HK(I2,I1)=0.0
  905 FSPANL(I,J)=FSPANL(I,J)+HK(I2,I1)
C
 1000 CONTINUE
  200 CONTINUE
C
C
C
      DO 3000 I=1,30
      DO 3000 J=1,50
 3000 FSP2(I,J)=0.0
C
      DO 4000 I=1,20
      DO 4000 J=1,40
      IP5=I+5
      JP10=J+10
 4000 FSP2(IP5,JP10)=FSPANL(I,J)
C
C
C
      DO 1100 I=1,30
      DO 1100 J=1,50
      X=0.5+1.0*(J-1)
      Y=0.5+1.0*(I-1)
      Z=FSP2(I,J)
      WRITE(15,5000) X,Y,Z
 5000 FORMAT(1X,3F10.6)
 1100 CONTINUE
 
C
C
      STOP
END
if anybody can help me to convert this into .m file, I will appreciate his or her effort.
Thanks
Mishu

[AlexanderKospach]

I´m trying to convert as well a frotran code to matlab code. I always get the errormessage

---------------------------------------
??? Too many outputs requested. Most likely cause is missing [] around
left hand side that has a comma separated list expansion.

Error in ==> findendSub_f at 80
         sublist{slLen+1,7}=sublist{temp6,1};

Error in ==> f2matlab at 899
 [sublist,funstr,funstrnumbers,funstrnumbers_b,funstrnumbers_e,funstrwords,funstrwords_b,funstrwords_e,fs_good]=findendSub_f([],sublist,s,funstr,funstrnumbers,funstrnumbers_b,funstrnumbers_e,funstrwo
 Error in ==> test at 2
f2matlab('MarqStepEX_P.for');
---------------------------------------

and i have no idea want it means. thx for any help

[bruce]

Ran the code and immediately received the following error:
??? Index exceeds matrix dimensions.

Error in ==> f2matlab at 1055
  funstr={funstr{segmentStarts(whichsub):segmentStarts(whichsub+1)-1}}';

Don't know enough about the code to solve this problem.

[Jin]