Questions tagged [fortran]
Questions about interfacing Mathematica and Fortran. This also includes conversion of Fortran style numbers to Mathematica style.
53 questions
1
vote
1
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Exporting a table using Fortran format for numbers [duplicate]
I would like to export in txt or tsv format a table that contains both alphameric and numeric entries, but I would like the numeric entries to be exported in Fortran format.
For example 1.234E-9.
Is ...
- 4,724
6
votes
1
answer
215
views
Python compatible fortran form for complex numbers
I am trying to use the Mathematica output of a complicated expression as input for python. As suggested in this answer, the FortranForm of an expression already ...
- 63
20
votes
1
answer
944
views
Is it possible to use the DGEEV and DSYEV LAPACK subroutines in Mathematica?
Here is my problem: I'm diagonalizing some matrices using Eigensystem[] to obtain eigenvalues and eigenvectors and I'm diagonalizing the same matrices using a ...
- 311
0
votes
1
answer
248
views
When I transform a long expression into fortranform, the output adds a minus sign at every row. How to fix it?
I try to transform the following expression into fortranform
...
- 1
1
vote
1
answer
211
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Run a code in Fortran, C++, or Python in Wolfram Mathematica 12 on Mac OS [closed]
I would like to run an external code, written in Fortran, C++, or Python, within Wolfram Mathematica 12 on my MAC OS. I looked up on Internet and I tried to read the WSTP documentation on Wolfram ...
- 453
2
votes
3
answers
184
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ListPlot3D from Data Fortran file
My .dat file (Fortran) consists of data (x y u) as three columns and I would like to plot the variable "u" against the variables "x" and "y&...
3
votes
2
answers
1k
views
Passing vectors into a Fortran function and getting out a vector
I am writing a Fortran function that needs to receive two vectors of reals, and as an output, returns a vector. The function could be for example the sum of the two vectors:
...
- 1,109
0
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0
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139
views
2
votes
0
answers
126
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Convert huge (10-100MB of plain text) Mathematica function for external use
I have a huge Mathematica function (plain text ranging 10-100MB) that I am trying to convert to Fortran for external use. I tried using FortranForm, which does most of the work, and cleaned the code ...
- 21
6
votes
3
answers
617
views
Convert Fortran-like number form to traditional number form
What is the most elegant way to convert arbitrary numbers written as (verbatim):
1.13903 e - 08
into traditional Mathematica number form without having to ...
- 42.3k
1
vote
0
answers
237
views
How to integrate a function written in fortran that solves a set of nonlinear equations into mathematica?
I am trying to integrate the solver for the set of nonlinear equations link written in Fortran language into mathematica . To do so i developed a function called netlib based on the explanation given ...
- 811
2
votes
2
answers
224
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Add a suffix to the end of every number in a string [duplicate]
I have some polynomial e.g. $2x^2 + 3x + 4$
In Mathematica I can define this, and convert it to a string simply enough
...
- 197
1
vote
0
answers
186
views
Can we link Mathematica and Fortran with WSTP? [closed]
How to link Mathematica and Fortran with WSTP?
2
votes
2
answers
476
views
Mathematica code in fortran [closed]
I have an integral in which the integrand is a combination of ratio of modified bessel function of second kind. I am able to find the solution of this integral with mathematica Nintegrate module with ...
1
vote
1
answer
375
views
Printing all elements of table in Fortran form
Let's say I have some Table object. The elements of this table are accessed as Table[[i,j,k]].
For each element in the array I ...
- 197
0
votes
2
answers
144
views
Replacing all integers in a string
Let's say I have some expression like,
expr = 1*a + 2*b +3*c + 4*d
I want to write this to a string that I can then use in some other Fortran script. I want all ...
- 197
3
votes
0
answers
349
views
How to import a binary data generated by Fortran? [closed]
I have a unformatted binary data file generated by gfortran. However, when the binary data is imported by Mathematica, a correct result is not obtained.
This is my fortran code:
...
- 43
2
votes
0
answers
348
views
Fortranform output in double precision
I want to take the output in fortran form but written in double precision notation.
For example,
exp=1 + 8*as^2*Log[2*x]
which gives
...
- 1,907
2
votes
1
answer
197
views
Replacement Patterns in FortranForm
I have recently asked a question concerning string replacement rules for FortranForm. This question has been answered by Carl Woll - thanks for that!
Now as I was ...
- 263
0
votes
1
answer
168
views
how to include conditional statements in FortranForm?
how to to include following formula in the FortranForm in a correct format?
...
- 811
3
votes
1
answer
181
views
Converting subscript in fortranform
i have a matrix like this:
F := Table[Subscript[f, i, j], {i, 3}, {j, 3}]
c=F.F
my question is that how to convert the components of c to this form Subscript[f, ...
- 811
2
votes
0
answers
95
views
possibility of using `f2py` for interoperability with Fortran
Although interoperability with Fortran could be realised by using LibraryLink (e.g., Linking FORTRAN with Librarylink), the approach is not so straight forward, in ...
- 4,367
3
votes
2
answers
375
views
Import .ini file with text and numbers
I have faced a quite simple problem, but, honestly, I don't know what would be better to do. I have a .ini file generated by a Fortran program with with this type of data:
...
- 33
3
votes
0
answers
141
views
FORTRAN complex number passing to Mathematica through NETLink
I used to use NETLink to call FORTRAN functions or subroutines compiled into a dll file. This works very well until now that I want to call a function which has complex arguments and returns a complex ...
- 1,507
1
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0
answers
164
views
Call NAG subroutine in Mathematica 10
Is there any package or any other way to call or use NAG library?
It was possible in old mathematica?
- 61
2
votes
2
answers
206
views
Problem with Dot and FortranForm
I am trying to convert some set of equations to a form that will be easy for Python to evaluate numerically, hence I am using Mathematica's FortranForm
My problem ...
- 1,205
3
votes
1
answer
562
views
Running a Fortran program and getting the results
I'm trying to figure how to make Mathematica interact with a Fortran program that takes 2 parameters in a first input line, 3 parameters in a second input line and produces two lines as outputs. Below ...
- 43
0
votes
1
answer
369
views
Importing a large number of complex matrices from a .DAT file and then numerically analyzing them one by one
I have a .DAT file generated by Fortran in which I have data for $2 \times 2$ matrices. For example, the file takes the form (when I open it in the excel):
I have added a snippet beacause the real ...
- 1,000
1
vote
0
answers
520
views
Integrate fortran function into Mathematica
I was trying to use Fortran function in Mathematica. I was following mainly this answer . My Fortran code looks like this:
...
- 661
4
votes
0
answers
96
views
weird behaviour of Listable fortran Librarylink function: different result each evaluation
I am working with fotran librarylink function currently. In this post, I will show some weird result of Listable fortran librarylink generated by intel compiler under windows (I tried gcc on linux the ...
- 17.4k
1
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0
answers
229
views
Using .Net link with fortran DLL created by Intel Fortran [closed]
I am following unstable's wonderful answer on .NET and fortran.
I can reproduce his result using gfortran without problem. But I want to use Intel Fortran, because gfortran generates slower code on ...
- 17.4k
1
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1
answer
485
views
What is the equivalent of FORTRAN 77 COMMON BLOCK in Mathematica?
I am in the process of converting a FORTRAN 77 program to Wolfram Language. I have several COMMON BLOCK statements in FORTRAN 77. My question is how to deal with them in Wolfram Language?
My ...
- 11
5
votes
1
answer
166
views
Customized FortranForm output
Let's take the following example
V = (-G*Mn)/Sqrt[x^2 + y^2 + z^2 + cn^2];
Vx = D[V, x];
FortranForm[Vx]
The result is ...
- 8,830
8
votes
0
answers
531
views
Where is f2mma.zip, Fortran to Mathematica converter?
I want to convert the SOFA libraries to
Mathematica, and found out about f2mma, a Fortran to Mathematica
converter.
Google points to many papers about f2mma, but the only link to the
software ...
user1722
1
vote
1
answer
489
views
How to get output in a specified format
In Fortran, we can easily get the stardard and easy output format. Now, we only focus on the Integer output. See here
How to realize this kind of output as formatted text file using Mathematica ? (...
- 1,247
2
votes
1
answer
780
views
3
votes
1
answer
949
views
Using FortranForm for d0 notation? [duplicate]
When I use FortranForm, it changes 2*a^2 into 2*a**2 which is fine, but if I want the expression in a form such as,
2.d0*a**2
which represents an integer to be ...
- 195
2
votes
1
answer
518
views
Insert a linebreak and character repeatedly into a matrix output which is in fortranForm
Suppose I have a very long string which is a11 element of matrix
a11=2*gopsv-2*Bgopsvw+2*acgmops*v+2*cgmopsv*B-2*acgmopsvB+3*gmopsvB-3*BgmopsvwB+m*w2*B +5*acgm2 +opsvB -ac*m2*w2*B +cgm2*opsvB* - 3*...
- 195
4
votes
2
answers
413
views
How to show Output of matrix in FortranForm with "&" character?
I have a matrix. and i have shown the output of matrix one by one element in FortranForm.
the problem is i want to put "&" continuation charater in output because when i am copying the data into ...
- 195
0
votes
2
answers
431
views
How to show output of a matrix in m(1,1)=a11 m(1,2)=a12 ...in this way......i have 50 *50 size matrix
How to show output of a matrix in m(1,1)=a11 m(1,2)=a12 ...in this way......i have 50 *50 size matrix
so i want to do it efficiently.
output to be shown like
m(1,1)=a11 (in fortranForm)
m(1,2)=a12 ...
- 195
0
votes
2
answers
669
views
Output of matrix in FortranForm
matr2 = Table[FortranForm[matr[[i, j]]], {i, 4}, {j, 6}]
but i want output to be more like this
matrix(1,1)=a11 output in ...
- 195
0
votes
3
answers
2k
views
Formatting Fortran complex number output for use in Mathematica
Here is a list that was orignially output from Fortran.
{{"(0.277336296055697, 0.120000000000000E+000)"},
{"(-1.489297392708939E-002, 0.340000000000000E+000)"}}
...
- 1,364
2
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1
answer
1k
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Using FortranForm
I need to use in Fortran, matrices that I create in Mathematica, therefore, I need to format them, so that Fortan can understand them. I focus on the simplest example:
Let's say I have tha matrix A ...
- 1,364
2
votes
2
answers
457
views
ToExpression and Fortran notation
ToExpression["9.0E-03"]
interprets the string as
9*e - 3
instead of what I am expecting:
...
- 451
7
votes
0
answers
267
views
Output most efficient Fortran code by mathematica
I am trying to output most efficient Fortran code by mathematica 9.0 with the method Simon provided:
How can I get Mathematica to produce better Fortran code?
The expressions is as follows:
...
- 511
1
vote
1
answer
617
views
Latest Mathematica 9.0 can't use Format.m to generate optimized Fortran code [closed]
Before updating to Mathematica 9.0, I have successfully generated beautiful Fortran code using Mark Sofroniou's Format.m package, which is posted on MathSource.
...
- 511
13
votes
1
answer
983
views
How to load FORTRAN libraries through Librarylink
First, the main reference is the thread Linking FORTRAN with Librarylink, which teaches how to make the link between a FORTRAN subroutine and a Mathematica code, by using Librarylink. This must done ...
- 738
9
votes
3
answers
3k
views
How to change an expression to Fortran90 form?
I have a large expression produced by Mathematica. To use this expression in my Fortran program I need to change it to a Fortran90 form. I am not satisfied with the ...
- 1,247
19
votes
6
answers
15k
views
How to export data files using specific number format
Very often, I have to export data files from Mathematica. These output files contain several columns and hundreds of lines with data. For the sake of the question let's create a sample list:
...
- 8,830
27
votes
2
answers
4k
views
How can I get Mathematica to produce better Fortran code?
I am new to Mathematica and I am trying to get to it to produce some expressions in Fortran code. However, it seems that Mathematica will output duplicated expressions, that is, expressions the need ...
- 511