logo
down
shadow

FORTRAN QUESTIONS

MSMPI in-place MPI_Allreduce not working with MinGW-w64 gfortran
MSMPI in-place MPI_Allreduce not working with MinGW-w64 gfortran
may help you . It turns out that the trouble is that in MSMPI the variable MPI_IN_PLACE is contained in an internal COMMON block /MPIPRIV1/ and it is a known bug in gfortran that the compiler fails to properly import COMMON block variables from DLLs.
TAG : fortran
Date : January 12 2021, 07:00 PM , By : damomurf
Checking the size of an array passed to a function
Checking the size of an array passed to a function
wish helps you Disclaimer: The author ask for an option to catch the bug. This answer doesn't provide it.
TAG : fortran
Date : January 02 2021, 06:48 AM , By : alexandruz
Problems with an exponential taylor series
Problems with an exponential taylor series
will be helpful for those in need You have several problems.First of all, you are not initializing expseries. You should set it before the loop. Right now, the result is completely arbitrary, since the initial value of expseries is undefined.
TAG : fortran
Date : January 02 2021, 06:48 AM , By : Chris Hanley
Reading real*8 variable with value 0 with real*4 results a large number in fortran without warning
Reading real*8 variable with value 0 with real*4 results a large number in fortran without warning
hop of those help? It is not the problem of the compiler. It is the problem of the code. Your code did issue a warning for me that you were doing something nefarious, as it should. The subroutine that thinks dsecs is 4 bytes long sent 4 bytes. The su
TAG : fortran
Date : January 02 2021, 06:48 AM , By : Lauren Kirschner
Why 5/10 division is resulting 0.00000E+00 in Fortran?
Why 5/10 division is resulting 0.00000E+00 in Fortran?
I wish this help you Fortran evaluates 5 / 10 before assigning the value to r.The result of 5 / 10 is 0 because both operands are integers.
TAG : fortran
Date : January 02 2021, 06:48 AM , By : Brazen
cannot set a breakpoint in gdb
cannot set a breakpoint in gdb
wish of those help I am trying to run a Fortran MPI code in gdb. Compiled with GNU. For the purposes of debugging, I am running with only one process. I cannot get the code to actually stop at any breakpoint. For instance, I want it to stop at line 1
TAG : fortran
Date : January 02 2021, 06:48 AM , By : mgaspar
Solving quadratic equation but getting weird errors
Solving quadratic equation but getting weird errors
wish help you to fix your issue Re the additional question of how to loop back to redo input -- an example program demonstrating loop features of Fortran >= 90. The loop is apparently infinite -- exit controlled by the IF statement exits the loop and
TAG : fortran
Date : January 02 2021, 06:48 AM , By : Diego
Basic RMA issue with MPI_Win_create, Null pointer in parameter NULL base pointer is invalid when size is nonzero
Basic RMA issue with MPI_Win_create, Null pointer in parameter NULL base pointer is invalid when size is nonzero
Does that help The size argument of MPI_Win_create() has type INTEGER(KIND=MPI_ADDRESS_KIND).I was then able to successfully run the modified version with both MPICH 3.3 and the latest Open MPI
TAG : fortran
Date : January 01 2021, 06:10 PM , By : Joe
Different program result depending on how program is linked
Different program result depending on how program is linked
I wish did fix the issue. I'm going to conclude the following, based on this explanation. When linking with /usr/lib/libm.so, the platform libm.so will be used. When linking with -lm, the Intel compiler will alter the linking command to also link the
TAG : fortran
Date : January 01 2021, 06:31 AM , By : Michael Gunderson
f2py raises 'Assertion error' while interfacing Fortran77 file with exclamation mark comments
f2py raises 'Assertion error' while interfacing Fortran77 file with exclamation mark comments
it fixes the issue So, I didn't have any luck in interfacing the program with f2py as F77. I tried to feed it to f2py as F90 files and it worked fine for me, because Fortran 90 compilers understand the fixed form notation.
TAG : fortran
Date : December 28 2020, 06:11 AM , By : obijywk
Procedure for multiplication of function procedures
Procedure for multiplication of function procedures
may help you . "When I pass int = integral(S*phi,E_min,E_max,1) (see below for the integral procedure) the error that I get is Function ‘s’ requires an argument list"You cannot multiply a function, only a function result. Also, there are no lambda ex
TAG : fortran
Date : December 27 2020, 04:51 PM , By : goffi
Inverse mapping in Fortran
Inverse mapping in Fortran
hop of those help? Here's a very simple solution. No Fortran on this machine so not entirely sure that I have the syntax absolutely correct. Define a derived type like this:
TAG : fortran
Date : December 25 2020, 04:01 PM , By : Arun Thomas
MPI shared memory communication with slided access
MPI shared memory communication with slided access
I wish did fix the issue. First, I would recommend using MPI_Win_fence for synchronisation rather than MPI_Barrier - this ensures synchronisation in time like barrier, but also ensures all operations on the window are visible (e.g. writes should be f
TAG : fortran
Date : December 24 2020, 03:28 PM , By : user167963
MPI_FILE_WRITE_ORDERED overwrites previous written data
MPI_FILE_WRITE_ORDERED overwrites previous written data
Hope this helps To quote from the MPI 3.1 standard, from section 13.4.1, positioning subsection: "MPI provides three types of positioning for data access routines: explicit offsets, individual file pointers, and shared file pointers. The different po
TAG : fortran
Date : December 24 2020, 01:30 PM , By : mansoor
End statement for Fortran elements
End statement for Fortran elements
will be helpful for those in need It's a little complicated but as you include the coding style tag I would first say I would strongly recommend using the full form in all cases - any decent editor will auto-magically complete an End statement approp
TAG : fortran
Date : December 24 2020, 11:30 AM , By : yarry
How to support multiple versions of the 'same' derived type in Fortran?
How to support multiple versions of the 'same' derived type in Fortran?
Hope that helps Unlimited polymorphic entities are not the correct approach here.Instead, we can define a base type which incorporates all of the common data and processing for the various other types. Here, let's call this base type profile_base_typ
TAG : fortran
Date : December 22 2020, 11:30 PM , By : meehan
Is there a short, portable way to specify "kind" in Fortran?
Is there a short, portable way to specify "kind" in Fortran?
I hope this helps you . I generally use this form to get double precision in my Fortran code: , The difference between
TAG : fortran
Date : December 06 2020, 11:47 PM , By : Saurabh
OpenAcc Intel Fortran Compiler
OpenAcc Intel Fortran Compiler
This might help you The PGI Community Edition is a free release of PGI Fortran, C, and C++ compilers and tools including OpenACC, OpenMP, and CUDA Fortran for Linux/x86, Linux/OpenPOWER, and macOS. Look here http://www.pgroup.com/products/community.h
TAG : fortran
Date : November 28 2020, 11:01 PM , By : Nulq
Passing an allocatable character to a subroutine with unlimited polymorphic dummy argument in Fortran
Passing an allocatable character to a subroutine with unlimited polymorphic dummy argument in Fortran
should help you out In a select type (or associate) construct, the associate name never has the allocatable attribute (16.5.1.6p2), regardless of whether the select has that attribute.In your case, the selector is also lacking that attribute - the va
TAG : fortran
Date : November 17 2020, 01:00 AM , By : stu73
gdb if condition syntax error
gdb if condition syntax error
should help you out The documentation for gdb has the following to say about Fortran support:
TAG : fortran
Date : November 13 2020, 03:01 PM , By : todor
Is there a performance advantage to defining numbers as parameters in FORTRAN
Is there a performance advantage to defining numbers as parameters in FORTRAN
wish helps you No, there is no performance difference whatsoever. The generated code will be exactly the same. It is probably used just to make using these numbers more convenient or (supposedly) readable.BUT you must be careful. Just 0.5 is a (defau
TAG : fortran
Date : November 13 2020, 04:01 AM , By : Ari
passing allocatable character through two levels of procedure calls fails
passing allocatable character through two levels of procedure calls fails
This might help you It is a bug in the compiler, and still stands in gfortran v9.0.0 (experimental) on Windows. You should report it with the vendor.I've done some tests and it seems that the failure only happens when: passing a present optional argu
TAG : fortran
Date : October 30 2020, 05:01 AM , By : user130518
Pre-processing !DEC$ directives in gfortran
Pre-processing !DEC$ directives in gfortran
To fix this issue Intel ifort understands the C-style preprocessor directives, so it might be easiest to convert your files to that style. Then you would have a single code base that would work with both compilers. There would be some work regression
TAG : fortran
Date : October 19 2020, 11:12 PM , By : anon
Ambiguous interface when using optional arguments in Gfortran
Ambiguous interface when using optional arguments in Gfortran
help you fix your problem I've just stumbled across this error when compiling a bit of code that I've been using without problems for ages now. I'm using Gfortran 8.2 on Linux and I suspect that a compiler update has caused the issue. , Gfortran comp
TAG : fortran
Date : October 14 2020, 02:15 PM , By : Noah
passing values to interactive fortran program using echo command
passing values to interactive fortran program using echo command
This might help you If you are using bash (or similar), I think echo -e or printf will be useful (but please check this page also). For example, either of
TAG : fortran
Date : October 08 2020, 01:00 PM , By : John Q.
In MPI how to get communicator when using several executables?
In MPI how to get communicator when using several executables?
like below fixes the issue There is no such predefined communicator specified by the standard.The great philosopher Jagger once said “you can’t always get what you want” and your best bet here is indeed to use MPI_Comm_split() and the value of MPI_CO
TAG : fortran
Date : October 08 2020, 03:00 AM , By : littlefuzz
How to determine file size in Fortran 77
How to determine file size in Fortran 77
I hope this helps . As Ian noted, any modern Fortran compiler should have INQUIRE. A simple test of
TAG : fortran
Date : October 06 2020, 07:00 AM , By : vasil
Interoperability: Fortran to C++
Interoperability: Fortran to C++
this will help The code in your "Update 2" is perfectly fine and works with Intel Visual Fortran and Microsoft Visual C++. See also the discussion you started in https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/
TAG : fortran
Date : October 05 2020, 01:00 PM , By : Aki Björklund
How does the Alternate Return feature of Fortran compare to coroutines and generators?
How does the Alternate Return feature of Fortran compare to coroutines and generators?
wish helps you Alternate returns simply allow a routine to return somewhere else than immediately after the call. There is no ability for "suspending their execution and allowing re-entry". You can think of alternate returns as a computed GOTO after
TAG : fortran
Date : October 04 2020, 10:00 PM , By : micate
index function returning many values
index function returning many values
will help you The bug:You defined your string as an array of single characters of length 10:
TAG : fortran
Date : October 04 2020, 10:00 PM , By : woxorz
How does the comma in line 2 translate to Fortran
How does the comma in line 2 translate to Fortran
wish of those help ATAN2 is a Fortran function of two arguments. It is a common function that exists in several other programming languages as well, probably also in the language you are copying your lines from. You should have told us which language
TAG : fortran
Date : October 04 2020, 11:00 AM , By : rhinojosa
How to get rid of a specific gfortran warning?
How to get rid of a specific gfortran warning?
it should still fix some issue If you are compiling the source code that generates that warning, then you have access to that source code. So you can modified the source code, but you just don't want to modified it. -Wno-align-commons controls warnin
TAG : fortran
Date : October 01 2020, 10:00 AM , By : shehan
How to break to new line in Fortran when printing?
How to break to new line in Fortran when printing?
I hope this helps you . It is very simple query but I'm not able to find the exact solution. How to break to new line when printing in Fortran? , There are several ways to print two lines of output.
TAG : fortran
Date : October 01 2020, 07:00 AM , By : Timbo
How to get mpif90 compiler for OpenSUSE Leap 15.0?
How to get mpif90 compiler for OpenSUSE Leap 15.0?
help you fix your problem From the package repositories, install an MPI implementation such as Open MPI (I don't use OpenSUSE myself so I don't know what the name of the package is, but I'm sure you'll find it if you use the search functionality of t
TAG : fortran
Date : September 30 2020, 06:00 PM , By : Matt Leacock
Is RETURN statement before END SUBROUTINE in Fortran codes considered a good practice?
Is RETURN statement before END SUBROUTINE in Fortran codes considered a good practice?
Hope that helps As the Intel guide mentions, it's pointless since the "end subroutine" statement already handles it. Return is useful if you need to, say, return inside a loop or such (but then there's a school of thought saying you should structure
TAG : fortran
Date : September 27 2020, 07:00 PM , By : Simone
Wrong result for the Inverse Matrix
Wrong result for the Inverse Matrix
This might help you (illustration using Mathematica)The problem is not related to MKL. Your matrices are singular for dime>2. MKL is not supposed to give a correct matrix inverse for a matrix that has no inverse.
TAG : fortran
Date : September 27 2020, 01:00 PM , By : orneka
How to read the real and complex numbers in a unified way in Fortran?
How to read the real and complex numbers in a unified way in Fortran?
around this issue Suppose I have a data file (fort.100) including the data like, , Please try this as simple solution for your issue:
TAG : fortran
Date : September 27 2020, 07:00 AM , By : Raghaw
Ignoring the intrinsic gamma function with gfortran
Ignoring the intrinsic gamma function with gfortran
will be helpful for those in need Ok, so I am using this old Fortran code that has defined a function that has nothing to do with the mathematical gamma function with the name gamma. , Add
TAG : fortran
Date : September 25 2020, 04:00 PM , By : user183526
Can't input value in f(x) in this Fortran code?
Can't input value in f(x) in this Fortran code?
wish helps you Be advised that statement functions, the function definitions the OP uses, are obsolescent.
TAG : fortran
Date : September 24 2020, 02:00 PM , By : fstender
Fortran can't read from file
Fortran can't read from file
With these it helps It seems to me that your file is a formatted file (in fact you use * as format). However you define it as 'unformatted' in the open statement. Try to set
TAG : fortran
Date : September 22 2020, 06:00 PM , By : Harry Truman
Comparing elements of a Fortran matrix to the average of the entire matrix and remembering the index of the number close
Comparing elements of a Fortran matrix to the average of the entire matrix and remembering the index of the number close
I hope this helps . I don't have Fortran on this machine so there may be some syntactic errors in what follows. First, let's find the mean of all the values in mat:
TAG : fortran
Date : September 22 2020, 07:00 AM , By : stan
Using MPI_PUT in fortran and different ranks have different displacements using c_loc
Using MPI_PUT in fortran and different ranks have different displacements using c_loc
I wish did fix the issue. I can answer item 2, at least. You have:call c_f_pointer(c_loc(r(1,1)),fptr) loc_base = fptr
TAG : fortran
Date : September 20 2020, 12:00 AM , By : Brianna
Is there a Gfortran flag similar to intel ifort's -ipo-c, that would generate single optimized object from all compiled
Is there a Gfortran flag similar to intel ifort's -ipo-c, that would generate single optimized object from all compiled
may help you . GCC has -fwhole-program, does that work for gfortran?Or if you don't want to pass all the Fortran source files on one giant command line, there's -flto link-time optimization which uses a linker "plugin" to run the optimizer on GIMPLE
TAG : fortran
Date : September 19 2020, 12:00 PM , By : MK.
What does o'377' mean in Fortran 77?
What does o'377' mean in Fortran 77?
around this issue It's an octal (base 8) representation. 377 octal is 255 decimal or FF hex.
TAG : fortran
Date : September 11 2020, 07:00 AM , By : KingGuppy
How can I specify in fortran compiler that declared variables shoud not be potentially treated as implicit function decl
How can I specify in fortran compiler that declared variables shoud not be potentially treated as implicit function decl
hop of those help? "But when linking there is no error considering the missing symbol es !"There is not supposed to be one. es is the name of the dummy argument, not the name of the actual procedure that you would pass there. What would actually happ
TAG : fortran
Date : September 09 2020, 04:00 AM , By : usingtechnology
What does this syntax mean in fortran?
What does this syntax mean in fortran?
around this issue What you are most likely looking at is Fixed source-form statement continuation which is part of the Fixed source form. Fixed-form formatting is an old way of formatting code which still stems from the old punched-cards. Lines could
TAG : fortran
Date : September 08 2020, 12:00 AM , By : Lauren Kirschner
shadow
Privacy Policy - Terms - Contact Us © scrbit.com