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

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2
votes
1answer
68 views

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

Consider the following sample: ...
7
votes
1answer
261 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 ...
0
votes
0answers
53 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
votes
1answer
220 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
votes
1answer
237 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 ...
1
vote
0answers
67 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
vote
1answer
229 views

Compile with array operations

When I use the function f with only the Module ...
3
votes
1answer
242 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
votes
0answers
76 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 ...
1
vote
0answers
58 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
votes
1answer
126 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
votes
1answer
149 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
votes
1answer
65 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
votes
1answer
378 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
votes
1answer
91 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
votes
2answers
206 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
votes
1answer
222 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: ...
3
votes
2answers
173 views

Why is my compiled function slower than a regular function?

I have the following functions: ...
1
vote
1answer
237 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
votes
0answers
149 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 ...
1
vote
0answers
89 views

Compiled version of user-defined function

I have a function for parameter estimation with these codes: ...
10
votes
3answers
235 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
votes
1answer
861 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
votes
1answer
148 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 ...
0
votes
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: ...
4
votes
3answers
193 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 ...
1
vote
1answer
110 views

How to apply compiled function on list

Compile function output error: How to apply compiled function on list? ...
1
vote
0answers
163 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: ...
10
votes
4answers
460 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
votes
1answer
203 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
votes
1answer
146 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
votes
3answers
434 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
votes
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
vote
1answer
329 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
votes
1answer
190 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
votes
2answers
314 views

Goto and Compile

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0
votes
1answer
143 views

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

I have defined the following function: ...
1
vote
1answer
154 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
votes
1answer
66 views

Unequal and Compile

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4
votes
1answer
154 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
votes
1answer
153 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
votes
1answer
459 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: ...
1
vote
1answer
210 views

Why doesn't my code compile?

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6
votes
2answers
172 views

ArcTan and Compile

See following three snippet code: ...
2
votes
2answers
135 views

global variables in compile statement

sorry for posting multiple questions about compile, but this is giving me some headache lately. This time my question is about using globally defined variables in a compile statement. The problem is ...
12
votes
1answer
226 views

MapIndexed and Compile

I am having trouble compiling a function that uses the MapIndexed function on the second level. The compilation runs fine, but at evaluation time I get an error ...
3
votes
1answer
126 views

How can I speed up my compiled function that is returned by another function?

Overview I have a function that acts like the Interpolation on sparse $n$-dimensional data using a simple implementation of RBF interpolation method. I want my ...
13
votes
1answer
189 views

Is the CompiledFunctionCall WVM opcode efficient?

There is example in Mathematica documentation about Compile ...