Questions about the generation and use of compiled functions using Compile.

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3
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0answers
32 views

Undeclared Identifier error in Compile

I've been trying to compile a couple of functions in Mathematica, and I keep coming across an error that I do not know how to resolve. Consider the following function: ...
2
votes
1answer
42 views

Using Compiled Function in Implicit Region

I am looking for a way to speed up code and thus would like to use a compiled function in an ImplicitRegion. Here is an example of a region that can be plotted ...
4
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0answers
116 views

CompilationTarget to C takes long compilation time

Consider I have a function, with one version that compiled to the virtual machine and one that compiled to C: ...
7
votes
1answer
83 views

How to compile procedural program effectively

Consider these four function in different form: ...
2
votes
1answer
98 views

How to use Compile to generate an $n\times n$ array using $n$ vectors

Let's consider the following: ...
1
vote
1answer
129 views

How to speed up an optimization with very long symbolic expressions?

I have 8 very long symbolic expressions (each having around 200,000 summands) - Simplify will run forever, so that is unfortunately not an option. Each of those ...
3
votes
1answer
49 views

Use a part specification as the argument to a compiled function

I have some code that needs to generate a large matrix based on some complicated combinations of smaller matrix elements. I find that if I write a function for the element of the larger matrix, and ...
2
votes
1answer
72 views

CCompile Problems

Operating System: Windows 8.1 Mathematica: 8 In possession of: Visual Studio 2013 and 2015 Had to alter the visual studios driver file within CCompilerDriver application, add-on so that it found the ...
0
votes
0answers
48 views

Compilable function with the functionality of SingularValueList

I'm doing something that involves finding the singular values of a lot of matrices. Basically I need to find singular values of $n$ matrices of dimension $n\times n$, where $n$ is as large as ...
3
votes
0answers
71 views

Why Function is compiled?

Function isn't mentioned in the list of compilable function, but it can generally be compiled when it's formed by compilable functions, a simple example is: ...
12
votes
1answer
471 views

What function generates random numbers in a compiled function?

I am writing a simulation for 2D random walk. I wrote several version of code, and found that the speed is like this (fastest to slowest): C++, Mathematica compiled procedural code, Mathematica ...
1
vote
0answers
112 views

How to use Wolfram language in an external program with low latency?

Im using Wolfram language on Pi B,and I want to compile a '.m' file (like "test.m" that contains Wolfram functions), in an external program like a C/C++ and then Export the output in an image file ...
5
votes
0answers
81 views

Compiling FoldList implementation for RK4

Original I'm looking to write an integrator for a function of two variables. Here is my implementation for the RK4 update rule using FoldList. ...
3
votes
0answers
77 views

speed up evaluating a listable function

I apologize in advance for the vagueness, but I can't think of a more descriptive title. I am trying to find the average value of the square of BesselJ[0, x] ...
7
votes
0answers
147 views

What is a good way to code long, complex, compilable algorithms?

The functional paradigm of the Wolfram Language used in Mathematica is all around wonderful. For intense numerics, Mathematica comes with the ability to Compile ...
1
vote
2answers
64 views

How to build recursive function which only remembers every pth value and the last two values?

I need to create a recursive function of the natural numbers $f$ which only remembers the last two values it has found and every $p$th value. Below is the form of the code that I am working with, but ...
4
votes
2answers
257 views

How to compile this function

I want to compile my function that calculates the energy of a particle system. This is what I've tried: ...
5
votes
3answers
89 views

Problem with Compile and Flatten

I want to get two lists within a compiled function, where r is an integer: ...
4
votes
2answers
159 views

Improve simulation speed using Compile

I have two square matrices, a hermitian matrix h and an unitary matrix v. I am interested in the following function ...
6
votes
1answer
253 views

Compiling a function that takes lots of optional arguments

I have a function that takes lots of optional arguments (basically some design parameters, about 10 of them) and performs some basic algebraic calculations involving complex numbers with the options. ...
12
votes
1answer
164 views

CompiledFunctionCall vs. LibraryFunction

When compiling code to C, and the compiled code calls other compiled functions, I see CompiledFunctionCall in the output of ...
12
votes
1answer
445 views

Save a C compiled function without losing the blessing of C compiler

Consider the following example: ...
2
votes
3answers
105 views

NIntegrate-ing a compiled function

I'm trying to integrate numerically in 6 dimensions a very long expression and I read about the option to NIntegrate a compiled function which should be faster. ...
5
votes
2answers
116 views

A problem with Compile and Map

There is a weird behavior of Compile that I do not understand. Consider the following example: ...
2
votes
1answer
63 views

Error from Compile with a sum over two indices

I have the following code: ...
0
votes
0answers
69 views

Bizarre Compile Error, changing one symbol

I am trying to compile the following code: ...
1
vote
1answer
61 views

What is the meaning of the lists of numbers in the FullForm of a compiled function?

For example, f = Compile[{{x, _Real}}, x]; FullForm[f] has this output: ...
0
votes
1answer
65 views

Why does Compile redo the calculation when overflow happens?

When implementing the Numerov method solving Schrodinger equation, I encountered this problem. In order to show the order of the evaluation, Print is added. ...
0
votes
2answers
116 views

Numerical 3D Integration in Mathematica [closed]

My question in short is: Is it possible to make numerical 3D integration in mathematica efficiently? Or am I gonna have to move this to C++? I feel this problem is way too trivial to go to C++, so ...
8
votes
0answers
182 views

Step-by-step instruction to Install C Compiler

I remember using C compiler on my previous computers, and I never had any problems installing them. At this time, however, I failed to work through the instructions provided in Mathematica ...
5
votes
1answer
100 views

Compilation of `Total` with CompensatedSummation

I sometimes obtain an unexpected error when trying to call a compiled version of Total with compensated summation turned on. More specifically I define ...
1
vote
0answers
88 views

How to get Mathematica to compile with target C?

I have been trying to compile some functions in mathematica with target C for speed. basically when I try: ...
5
votes
1answer
197 views

Compile, “global variables” and recursion

I am trying to do something similar to this, namely to make a Compile'd function outer that itself calls a ...
0
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0answers
26 views

Returning multiple results from compiled functions in M10 [duplicate]

I have found a similar question from 2012 here. It has been 3 years now and we have version 10. Have there been any attempt to solve this problem either by Wolfram or by the community - how to return ...
3
votes
2answers
150 views

Dynamic arrays and lists with compile (Append, Linked lists etc.)

I have a code that I need to compile. The code contains a loop in which I need to gather data into a list. The question is how to best gather data so that the code works inside Compile. The following ...
0
votes
1answer
67 views

Correct use of Solve inside Compile

I have a function that behaves itself, but I want to make it much faster so I tried to put it into a compilable form After much fiddling I can't get it to work. Here's one of my failed attempts: ...
2
votes
1answer
53 views

Why do messages only appear first time I evaluate my compiled function?

I declare my compiled function: ...
5
votes
1answer
137 views

Slow-down encountered when using NMinimize with a compiled function

I'm minimizing a large function. Evaluating the function is very slow symbolically but using Compile I can get ~100x speed-up on this step. However, despite this, the NMinimize process is only ...
2
votes
0answers
64 views

Goto and Compile to C

When I use Goto inside compile and use CompilationTarget->"C" I get error message: ...
4
votes
1answer
143 views

Throw and Catch return wrong result inside Compile

Consider this code: fun = Compile[{{i, _Integer}}, Catch[Do[ If[j >= i, Throw[j]] , {j, 1, 10}]] ] I put an integer as argument then if this ...
1
vote
1answer
73 views

Throw and Catch or Return inside Compile

Consider this code: ...
3
votes
1answer
76 views

Package and imbricated compiled functions

I would like to build up a Mathematica package Pck which contains compiled functions. However when loading this library I obtain an error. When reduced to a minimal ...
5
votes
1answer
207 views

Is there any strategy to have a compiled version of FindFit or NonlinearModelFit?

Disclaimer: This is not a precise question with a definite answer. I know that neither FindFit nor NonlinearModelFit is in the ...
2
votes
1answer
198 views

Compile a MeijerG function [duplicate]

I am not very experienced with Compile, I tried to use it for a Meijer-G function ...
1
vote
0answers
49 views

Complex input for Compile makes it slow

I asked a question here and then tried to use Compile for the solution to gain even more speed. Inside Compile there is a loop ...
4
votes
1answer
138 views

A problem about CompilationTarget -> “C” [duplicate]

In my Windows 7 system, I installed two Mathematica versions (V8 and V9) In V8 Compile[ {{x}}, x^2 + Sin[x^2], CompilationTarget -> "C"] ...
1
vote
1answer
83 views

Compiling If statement

I have this code: ...
3
votes
1answer
72 views

Is it possible to change the MinPrecision in command “Compile”?

I'm using "Compile" to do some numerical calculation and I need high Precision. I was wondering if it is possible to change the Precision in command "Compile" to some $MinPrecision?
0
votes
2answers
94 views

Compile a Module wich has a loop with undetermined bound

Suppose I have such a module as below: test[int_] := Module[{m}, m = Table[i, {i, 1, 10}]; Do[m[[i]] = i*i, {i, 1, int}]; Return[m] ] The bound for ...