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

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Compilation of a function that needs to call Subsets

I'm working on a code that runs many (easy) operations on combinations (subsets) of different size (6, 7, 8, 9) taken from a big set of numbers (normally more that 40). So, this means the code has to ...
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1answer
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1answer
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Apply functions to functions yields slow execution speed

I'm trying to write a function that parametrizes a curve c(t) by its arc length. Technicly I'm finished but if I plot the result for an example curve like ...
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0answers
44 views

Use Compile to speed up evaluation

I have read, that using Compile command can speed up evaluations in mathematica. I have a mathematical expression, which I evaluate using following command: ...
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2answers
72 views

Generating compiled functions from inactive expressions

I am working on a project in which I need to dynamically generate CompiledFunctions from Inactive expressions. For example, I ...
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1answer
78 views

Compile with modification of arguments' values

Is it possible to compile while changing the value of the arguments the function receives, instead of just creating new variables, and then returning those new variables,i.e., is it possible to pass ...
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How to use a C compiler without having SystemModeler

In this question the answer given implies that I must compile a certain function. When I try to compile I get the error A C compiler cannot be found on your system. Please consult the ...
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1answer
82 views

Problem using Compiled Function within NProbability

I've built a very simple function to estimate the probability for a Long Straddle (derivative strategy) to be positive at expiration. ...
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1answer
106 views

How to Use Mathematica as a C/C++ compiler [closed]

I am learning C/C++ programming, but I don't wannna install new software for compiling C/C++, so, is there any possibility to compile C/C++ code using Mathematica? Here is the first program I want to ...
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Fine tuning compiled code that computes dilogarithm function

As an exercise of writing a good Compile function, I want to do the simple task of coding a routine that outputs the real part of the dilogarithm function ...
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2answers
129 views

Catching error in middle of evaluation of compiled function

I have programmed and Compileed a complicated numerical function. The function has singularities (i.e. are infinite) at certain input numerical values. I need to ...
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1answer
517 views

Has this implementation of FDM touched the speed limit of Mathematica?

Still, I'll use the implementation of the 1D FDTD method (you can simply understand it as a kind of explicit finite difference scheme for the Maxwell's equation) as the example. Just for completeness, ...
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3answers
198 views

How to use a compiled function in numerical optimization

I'm trying to wrap my head around function Compile. So, this is a spin-off question from: a previous question on using compile[] correctly. I have a function that ...
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1answer
122 views

How do I format Compile[] correctly?

My Mathematica skill is still rusty, so kindly bear with me. I'm having problem formatting expression to compile the function correctly: $\sum _{g=1}^G \sum ...
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How to do replacements in Compile'd code? [duplicate]

I want to do something in the spirit of this code: ...
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1answer
64 views

Evaluating arguments of module (inside compile)

Note: this is a clarification of 2 earlier unanswered questions, Compile issues, scoping and order of evaluation and Optimising a simple computation with vectors . The problem I have a list of ...
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1answer
116 views

Compile nested Sums

I want to compile an expressions that contains nested Sum-expressions. A simple example that gives me problems is: ...
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1answer
120 views

Unable to compile to C

I used to be able to compile to C without problems, but from one day to the next, when I try to compile something, e.g. ...
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1answer
61 views

Determine return type of CompiledFunction expression

Is there a way to extract the types of the arguments and the return type from a CompiledFunction expression? I am writing a package for code generation (basically a wrapper around CCodeGenerate) where ...
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0answers
81 views

Compile issues, scoping and order of evaluation

I have a few questions about compiling functions, which I think are all related to scoping and order of evaluation. I will illustrate them by a minimal example of the problem I have. I'm sorry for ...
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0answers
37 views

Compiled DiagonalMatrix

The standard function DiagonalMatrix cannot be compiled, so I tried writing my own: ...
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0answers
39 views

CompiledFunction with multiple outputs of different ranks

Below is a simple compiled function f that gives multiple outputs. ...
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4answers
245 views

Speed up Schwarz-Christoffel mapping

I would like to ask your advice how to speed up Contour and Parametric plots in the following example. Let as start by defining a function ...
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1answer
342 views

Using Compile Function Options efficiently

While this gives general pointers, I want inputs on ground rules for improved performance of nested/interdependent compiled functions. sample problem: a, ...
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Compiler stack overflow

I tried to compile a huge function. I used these options: ...
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Listable compiled functions used in NMinimize

This is an example from MMA: cListable = Compile[{x}, (x-1)^2, RuntimeAttributes -> {Listable}] In case of single entry: ...
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Exporting a compiled function for later use

I compiled a function then used it in NMinimize. The computation took 19 seconds. Then, I exported this compiled function and restarted MMA and imported this ...
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2answers
97 views

Problem with machine number precision in compiled functions

When I compile a very big function and give it input the function returns error. I realized that this is because the value of the function becomes smaller than the smallest machine number. Is it ...
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Mathematica cannot find the c compiler

I installed Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1 Then, I installed Mathematica 10 trial version. I did: ...
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1answer
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Compile Determinant [closed]

I would like to determine the determinant of a 4x4 matrix with the entries a[i,j] being functions of $i$ and $j$. I used Compile with code: ...
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Is it possible to Compile the function with string argument?

As we can see from the Compile documentation, the typical arguments for Compile should be ...
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2answers
158 views

Using compiled function inside NMinimize

Consider this code: ...
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2answers
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How to use Compile

Consider the code below: variable = Sin[x]; fun = Compile[{x}, variable ]; fun[1] When I do this I get the error: ...
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Evaluation inside Compile

here's a simple question: I have a function: ...
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1answer
127 views

Why is my compiled code slower?

I am trying to make a Mathematica program run faster. Here is part of the original version. It takes as input the integers X (of order 100), J (of order 10000), and n (of order 100), the real number p ...
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1answer
238 views

Performance of compiled functions (Project Euler No14)

I was playing around with the project euler problem 14. The solution I came up with is listed below as cf1. The solution works fine but I get the compiler warning: ...
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Speeding Up Image Processing Functions

I am working with stacks of 1024x1024 timelapse microscopy images that I am performing a series of image processing functions on to help segment each image. These functions include ...
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2answers
188 views

How can I prevent a compiled function from using uncompiled evaluation?

I write a code that creates a compiled function, and then call that function over and over to generate a list. I run this code on a remote server via a batch job, and will run several instances of ...
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2answers
77 views

How to speed up recursive compiled functions?

I'm trying to speed up the recursive function that calculates Rotation numbers: ...
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1answer
245 views

MinGW-64 and CompilationTarget -> “C”: can't make library

I'm trying to set up my new Windows 8.1 tablet to compile Mathematica (9.0.1) functions to C, using the MinGW-64 compiler. I have it set up so that the following works: ...
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1answer
66 views

Warning and Errors during Compile

I defined a compiled function cf = Compile[{{x, _Integer}, {n, _Integer}}, z = (n^x); Binomial[n, #]* StirlingS2[x, #] *(#!)/z & /@ Range[x]]; and I ...
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In Compile “InlineExternalDefinitions” doesn't work anymore in Mma v10 like in v9

In Mma 9 using CompilationOptions -> {"InlineExternalDefinitions" -> True} inside of Compile inlined the values of the ...
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Regarding CompilationTarget->“C”

Recently I have read some interesting things about CompilationTarget->"C" on SE, e.g. in http://mathematica.stackexchange.com/a/54459/11116 where @MichaelE2 ...
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Compile without hardcoding

My question is how to pre-compile the rules1, rules2 and result parts of the following Module code without hard-coding the many (and changing number of) variables and rather complicated equations: ...
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Why isn't Compile working for me? [closed]

I cannot get what's the problem with Compile function in my program. If I simply use the Abs function, I get this answer: ...
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41 views

Get rid of external library dependency

I am trying to generate C code for some functions, which I do not post in full because they are a few hundred lines long. The functions do nothing too fancy: a bunch of dot products, powers and roots. ...
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1answer
55 views

Alternatives to indexed variables in Compile

According to the excellent answer given here by @Leonid Shifrin: How to compile effectively?, You can not really use indexed variables in Compile, although it ...
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Compiling function with predefined expression

I'm using the Compile function in Mathematica to compute say the following : f=Compile[{x,_Real},Cos[x]] Then I can compute f[x] for x taking any real value. Ok, ...