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

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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, ...
6
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1answer
307 views

CompilationTarget->“C” crashes the kernel

Major deviation from my original post I realize that the long code I originally had was very discouraging to debug and did not attract any answers. So I have decided to revamp this question ...
3
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1answer
78 views

Usage of Block in Compile

When is there an advantage to using Block in Compile? For instance, if I have a multiple-step code, how do I decide which ...
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1answer
98 views

Mathematica Compiled Functions - additional functions

Mathematica supports an exact list of compilable functions: They are listed here: List of compilable functions. However, I would need to add the following functions: ToExpression, StringFreeQ, ...
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2answers
215 views

A fast way to compare interval

I have a list of intervall. Some of these intervals are disjoint, some are overlapped and some are included in others. To leave no ambiguity about my explanation, you can see the following examples: ...
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0answers
71 views

When to use Compile

I am new to Mathematica and have a general question: Working with matrices I have the impression that Compile can only be used if the elements of a matrix are ONLY Integers or ONLY Reals. No mixed ...
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1answer
70 views

How to make the code inside Compile conciser without hurting performance?

Consider the following sample: ...
7
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1answer
331 views

make mathematica recognize CCompiler and compile CUDA code on remote Windows machine

I have set up a Mathematica remote kernel on a Windows 7 64 bit machine, which has Microsoft Visual Studio 2010 installed. When I start Mathematica on the windows machine Mathematica recognizes the ...
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0answers
54 views

How to compile a function whose arguments are list?

I'm unsuccessfully trying to compile this function check[argA_, argB_] := argA[[1]] == argB[[1]]; assuming that both arguments argA and argB are of the form ...
6
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1answer
226 views

If doesn't compile if its output is the output of Compile?

The smallest sample I can find to reproduce this problem is: test = Compile[{}, If[True, 1]]; << CompiledFunctionTools` CompilePrint@test ...
10
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1answer
243 views

Bizarre behavior of With, Compile and Break

I'm guessing this is almost certainly a bug in Compile (because they're fairly common), but it's pretty weird and I spent about an hour tracking down the issue and ...
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0answers
70 views

Linear interpolation over 2 variables

I'm tuning a function to data over 4-5 variables using Differential Evolution. The objective function calls frequently interpolation function. I came to a point, where compiling the objective function ...
1
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1answer
236 views

Compile with array operations

When I use the function f with only the Module ...
3
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1answer
257 views

Need help with C Code Generator

I'm trying to use the Mathematica C Code Generator package to generate code that is to be included in a web application by a developer. I don't know any C, and this seems to be the only way to ...
3
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0answers
80 views

Compiling/calling Mathematica-generated .so from C

I'm trying to call a compiled function from a C program. I am generating the static object ...
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0answers
59 views

Challenge: Creating Compilable Permutations Function

As Mathematica's implemented Permuations function is not compilable I tried to write my very own Permutations implementation, called ...
5
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1answer
131 views

How to speed up this TDSE code?

I'm trying to build a 1D time-dependent Schrodinger equation solver, using the Crank-Nicholson method. And I think the code is kind of working now, but the speed is still slow for me. Here is the ...
0
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1answer
154 views

Issue with Compile

The following code works fine with the the function f defined as a module, however, when I convert it to be a compiled function, it gives me errors. Can some one ...
0
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1answer
66 views

How to compile gather [duplicate]

First question,How to Compile this? gather[data_]:=Gather[data, Mod[#1, 3] == Mod[#2, 3] &] I dont know why this is wrong. ...
9
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1answer
386 views

Compile function which calls other functions to C

I have a function which calls other functions and I would like to compile it to C code. For example: ...
2
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1answer
99 views

Determine types of input, output and internal variables in compiled functions

I am trying to speedup the computation of a longer function using Compile. For illustration consider the following short example: ...
15
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2answers
209 views

Third argument of Compile

In his last comment on this answer, halirutan shows an example in which the third argument of Compile does not have any effect. The example is as follows. ...
20
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1answer
224 views

M9 performance regression for Fold?

I noticed an over 10x performance drop on Mathematica v9.0.1 (as Oleksandr R. commented, also v8) compared with v7.01 for this code: ...
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2answers
177 views

Why is my compiled function slower than a regular function?

I have the following functions: ...
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1answer
257 views

How to use Compile with NDSolve function for large no of differential equations?

Matrix M[t] and and Hamiltonian of same order L^n x L^n. ...
8
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0answers
157 views

Check whether a working CCompiler is installed

Let me give a bit background: As many of my answers imply, I often use the auto-parallelization (meaning, that Mathematica distributes the calculation automatically over several cores when ...
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0answers
89 views

Compiled version of user-defined function

I have a function for parameter estimation with these codes: ...
10
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3answers
238 views

Can I return lists with different dimensions from a compiled function?

Sometimes I'll need several lists with different dimensions to be returned by a compiled function, but compiled function will fail if an irregular list contained: ...
4
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1answer
969 views

Creating a standalone (executable) from mathematica code

I have written a small mathematica code to input a ".csv" file and output the data in a specific format, in a ".txt" file. I would like to give this program as an executable to my friend as she ...
9
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1answer
153 views

How to avoid CopyTensor in CompiledFunctions?

In a reply here Leonid wrote, “Compile can handle a number of higher-level functions, such as Transpose, Partition, Map, MapThread, etc. Most of these functions return expressions, and even though ...
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1answer
86 views

How can a function with an embedded function be compiled?

Compile fun continues today, and I'm trying to get the function below to compile. First the function: ...
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3answers
195 views

How to compile a diagonal array efficiently?

For example, if we use some functions defined prior to Compile, we usually have the main evaluators in the compiled codes, pointing to the definition of the ...
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1answer
111 views

How to apply compiled function on list

Compile function output error: How to apply compiled function on list? ...
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0answers
173 views

Using Part within a Compiled Command

I'm looking to define a multi-line function that makes use of the "Part" command. A toy example: ...
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4answers
536 views

Can (compiled) matrix permanent evaluation be further sped-up?

Update II  Sample code for simulating boson-sampling experiments has been added (as an answer). This code exploits new Mathematica capabilities relating to both empirical and smooth ...
0
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1answer
204 views

Function won't compile. Is there a workaround? [duplicate]

Here's a simplified form of a function I would like to compile, but it produces errors ...
13
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1answer
149 views

CompiledFunction returns machine numbers smaller than $MinMachineNumber

When thinking on the workaround for this LogLogPlot bug suggested by halirutan I noticed that CompiledFunction actually can ...
8
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3answers
446 views

What is wrong with my expression for compiling?

Following code was translated from a snippet matlab code. Without compiling it worked slowly. I want to compile it, but am getting a numerical error. How do I compile this in a correct way? ...
3
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2answers
190 views

My code for solving n queens problem Compile Failed

I want to make my code for solving n-queens problem faster, but it seems that MapIndexed can't be compiled. Mathematica return CompiledFunction::cfse: Compiled ...
1
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1answer
351 views

CompiledFunction::cfse: "Compiled expression X should be a machine-size integer

I am trying to use a compiled function in order to save time... LegrendeTransform = Compile[{y}, MaxValue[Sin[x] - x *y , x]] Now I want to to evaluate and ...
5
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1answer
191 views

How to use Compile to efficiently apply a function to every element of a list

Let's say I have a list of random numbers; list = Table[Random[], {100000}]; I want to apply a function f in every element of ...
8
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2answers
326 views

Goto and Compile

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1answer
146 views

How to return the rhs of a transformation rule from within Compile[]

I have defined the following function: ...
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1answer
163 views

No Speedup Compiled Function in FindMinimum

The problem: I would like to minimize an objective function with respect to 12 variables. Minimization should be executed as fast as possible. Compiling the objective function increases the execution ...
5
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1answer
67 views

Unequal and Compile

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4
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1answer
156 views

MapThread and Compile

After discovering that MapIndexed cannot be used with compile (see MapIndexed and Compile) I am now trying do implement similar functionality using a combination of ...
4
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1answer
156 views

Can I compile a function containing ArcTanh?

Can I compile a function that contains ArcTanh[]? The following doesn't work Needs["CCodeGenerator`"] c = Compile[ {{x}}, ArcTanh[x]^2]; c[2.5] Mathematica gives ...
9
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1answer
499 views

Example program for calling Mathematica from C

I want to call Mathematica from a C program. Suppose I have two numbers x =2 and y=3. I want to define the x, y in a C program and call Mathematica and I want Mathematica to do the sum and return me ...
2
votes
1answer
114 views

Can Map operations be compiled or otherwise sped up for large lists?

I'm performing a series of Map operations in the following script: ...