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

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5
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4answers
184 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 ...
1
vote
0answers
86 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, ...
1
vote
0answers
73 views

Compiler stack overflow

I tried to compile a huge function. I used these options: ...
4
votes
0answers
44 views

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: ...
6
votes
0answers
88 views

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 ...
3
votes
2answers
76 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 ...
0
votes
0answers
52 views

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: ...
-2
votes
1answer
41 views

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: ...
2
votes
0answers
34 views

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 ...
1
vote
2answers
94 views

Using compiled function inside NMinimize

Consider this code: ...
1
vote
2answers
126 views

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: ...
0
votes
0answers
39 views

Evaluation inside Compile

here's a simple question: I have a function: ...
3
votes
1answer
117 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 ...
1
vote
1answer
215 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: ...
1
vote
0answers
124 views

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 ...
7
votes
2answers
168 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 ...
1
vote
2answers
61 views

How to speed up recursive compiled functions?

I'm trying to speed up the recursive function that calculates Rotation numbers: ...
4
votes
1answer
111 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: ...
1
vote
1answer
51 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 ...
13
votes
1answer
158 views

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 ...
0
votes
0answers
53 views

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 ...
0
votes
0answers
66 views

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: ...
1
vote
0answers
55 views

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: ...
0
votes
0answers
33 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. ...
0
votes
1answer
48 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 ...
1
vote
2answers
48 views

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, ...
5
votes
1answer
297 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
votes
1answer
72 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 ...
1
vote
1answer
83 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, ...
1
vote
2answers
202 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: ...
1
vote
0answers
68 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 ...
2
votes
1answer
63 views

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

Consider the following sample: ...
7
votes
1answer
217 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
50 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
213 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
234 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
60 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
212 views

Compile with array operations

When I use the function f with only the Module ...
3
votes
1answer
218 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 ...
2
votes
0answers
61 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
54 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
118 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
132 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
57 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
368 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
74 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: ...
14
votes
2answers
198 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
216 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
156 views

Why is my compiled function slower than a regular function?

I have the following functions: ...
1
vote
1answer
203 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. ...