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

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Challenge: Creating Compilable Permutations Function

As Mathematica's implemented Permuations function is not compilable I tried to write my very own Permutations implementation, called ...
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1answer
159 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 ...
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1answer
176 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 ...
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1answer
73 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. ...
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1answer
410 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: ...
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1answer
150 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: ...
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2answers
240 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. ...
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1answer
270 views

M9 performance regression for Fold?

Bug introduced in 8.0 and persisting through 10.0.2 or later 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
210 views

Why is my compiled function slower than a regular function?

I have the following functions: ...
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1answer
380 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. ...
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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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92 views

Compiled version of user-defined function

I have a function for parameter estimation with these codes: ...
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3answers
247 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: ...
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1answer
1k 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 ...
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1answer
160 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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91 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
213 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
118 views

How to apply compiled function on list

Compile function output error: How to apply compiled function on list? ...
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0answers
237 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
598 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 ...
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1answer
211 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 ...
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2answers
172 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 ...
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3answers
530 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? ...
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2answers
207 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 ...
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1answer
460 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 ...
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1answer
204 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 ...
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2answers
394 views

Goto and Compile

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1answer
173 views

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

I have defined the following function: ...
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1answer
234 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 ...
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1answer
73 views

Unequal and Compile

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1answer
166 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 ...
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1answer
171 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 ...
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1answer
617 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 ...
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1answer
115 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: ...
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1answer
275 views

Why doesn't my code compile?

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2answers
203 views

ArcTan and Compile

See following three snippet code: ...
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2answers
177 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
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1answer
237 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 ...
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2answers
179 views

How can I speed up my compiled RBF interpolating 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 ...
14
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1answer
214 views

Is the CompiledFunctionCall WVM opcode efficient?

There is example in Mathematica documentation about Compile ...
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1answer
156 views

how to Compile user-defined function like this

the following function can be compiled successfully ...
10
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0answers
338 views

Compile recursive function modifying global variables

How to compile recursive formula when it relies on more than a few global variables (global to the topmost compiled function)? It is unreasonable to pass on all such variables to each recursive ...
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2answers
209 views

Can we compile using only Integers Of Unusual Size?

I coined Integers Of Unusual Size to mean "bignum" using GMP, the underpinning of Mathematica's ability to craft very big numbers. I have these functions from this question: ...
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1answer
200 views

What is the correct way to use Compiled function in Table and Plot without slow down?

On V 9.01 on windows 7, all 64 bit. I am sure I am missing something simple here, but I used all the tricks of the trade that I know about, and read docs, and do not see anything that helps. Here is ...
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2answers
185 views

Compile error from If but not from Piecewise

Consider this: point={1.,2.}; f1 = Compile[{{t, _Real}}, Evaluate[Block[{a, b}, {a, b} = point; If[t > 0., a*b*Sin[t], 0.]]]]; f1[2.] ...
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1answer
276 views

How to compile Heike's winding number function?

Heike gave the following function for winding number: ...
4
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1answer
167 views

How to set return type of `InterpolatingFunction ` in compile

Consider this ...
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2answers
144 views

Error when compiling function containing InterpolationFunction

I'm trying to solve a coupled ODE system using NDSolve. The coupling can turn on and off in some regions, and when the coupling is off, the solution can be written ...
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1answer
196 views

Error messages from compiling the Piecewise function

The following works Compile[{{x, _Real}}, Piecewise[{{{0., 0.}, x > 5.}}, {1., 1.}]] but if I enter the Piecewise[...] in ...