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

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8
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2answers
183 views
+150

How to boost the performance of my own BSplineFunction

In my CAGD package, I implemented a CAGDBSplineFunction[] like built-in BSplineFunction[]. ...
0
votes
0answers
39 views

FindFit with compiled function [on hold]

I try to fit parameters of my experimental data by FindFit. For the model function I use a compiled function, that does numerical calculations. Unfortunately, I get ...
4
votes
2answers
98 views

Compile with function definition inside

How can I compile a code with target C containing function definition inside? I saw post using With. But this just inserts the function in the appropriate place ...
2
votes
0answers
59 views

How to use Compile? Bivariate Gibbs Sampler

I am trying to use compile to speed up my Gibbs sampler. I know I can use Reap and Sow to speed up tremendously. I have a more complicated Bayesian posterior that I want to speed up with compile so I ...
0
votes
0answers
37 views

Compiling LinearSolve with 2 complex matrices, possible bug

Take two complex matrices depending on one variable, for example: ...
26
votes
5answers
963 views

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

Update III  Mathematica 10.2.0 now ships with a predefined System`Permanent function, which the PermanentCode package ...
2
votes
1answer
174 views

Compiling in mathematica

I'm trying to compile what I think is a pretty simple function that does matrix multilplications in a loop (see below). But Mathematica issues the message: Could not complete external evaluation ...
120
votes
8answers
11k views

List of compilable functions

Is there somewhere a list on the functions that Compile can compile, or the cases in which a particular function can be compiled that I haven't found? I'd be glad ...
3
votes
1answer
77 views

Table with programmatically specified number of iterators in Compile

Compare two ways of computing a table of values of a multivariable Gaussian: ...
4
votes
1answer
97 views

How to compile when function contains Condition?

I use the following triangular recursive algorithm to compute $\{N_{i-p,p},\cdots,N_{i-1,p},N_{i,p}\}$ here, $$N_{i,p}(u)=\frac{u-u_i}{u_{i+p}-u_i}N_{i,p-1}(u)+\frac{u_{i+p+1}-u}{u_{i+p+1}-u_{i+1}}...
1
vote
1answer
68 views

Create a Mathematica function that can be called from R or Matlab

I would like to export a function from Mathematica to allow it to be accessed from R and/or Matlab. Is there a way to do this? As an example, suppose I want to export the following (albeit ...
1
vote
0answers
58 views

How to speedup Plot3D with precompiled argument

I have a huge problem with my code: I estimate it to take hours to run. The scheme of the code is the following (I left the steps the same, but took much simpler functions): ...
12
votes
1answer
244 views

Has compilation of big programs become excessively sluggish in v 10.4?

Bug introduced in 10.4 and persisting through 10.4.1 After updating to 10.4, many of my heavily numerical functions defined by Compile takes a huge amount of time ...
2
votes
1answer
73 views

Compile with a list as an argument

This is probably trivial, but I couldnt make it work: safeConv = Compile[{{a, _Complex, 10}, {b, _Real}}, If[b > 1, a[[1]], 0] ]; I get a rank-error ...
0
votes
0answers
49 views

Problem with Greater in Compile

I am relatively inexperienced with Mathematica so I apologize for the possibly simple question. I have written the following function which should receive a matrix as input. If I compile this, ...
17
votes
2answers
1k views
0
votes
0answers
42 views

Compiled funtion don't understand internal compiled function [duplicate]

I work a lot on Mathematica and sometimes I need to optimize my computations by using compiled functions. Now I'm making numerical integrations and I'm trying to compile the functions involved to make ...
5
votes
1answer
263 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 ...
1
vote
1answer
84 views

What's the syntax to compile these functions, whose arguments are nested lists? [closed]

In some case the Compile's syntax is quite straightforward. Es. for rank 1 e rank 2 tensors: ...
1
vote
1answer
89 views

Compile function - error but correct calculation

I am investigating Compile lately and I came across the following problem. I define a 2-variable function ...
122
votes
6answers
12k views

How to compile effectively?

What are the best practices of compiling functions? I understand that this is a vague question, but let me list some aspects that might trigger useful answers. Some of these have already been answered ...
3
votes
1answer
139 views

Why does Compile not make my function faster?

I need to speed up a large program that repeatedly calls the module below (I've not trimmed the code for this question to ensure there is enough calculation to show a speed improvement.) The obvious ...
2
votes
3answers
146 views
3
votes
1answer
59 views

List of compiled functions and then plot them 1 by 1.

I would like to create a list of compiled functions and then plot them 1 by 1. To illustrate the problem (In reality the functions I want to compile are of course not x^j but some complicated ...
37
votes
4answers
2k views

Compiling more functions that don't call MainEvaluate

I would like to use Compile with functions defined outside Compile. For example if I have the two basic functions ...
6
votes
2answers
141 views

How to define a complicated function inside the body of Compile?

I want to compile a function in a way to keep its memory footprint down. In the example below, I am trying to compile a function f that makes three calls to ...
3
votes
0answers
45 views

weird behaviour of Listable fortran Librarylink function: different result each evaluation

I am working with fotran librarylink function currently. In this post, I will show some weird result of Listable fortran librarylink generated by intel compiler under windows (I tried gcc on linux the ...
1
vote
1answer
37 views

Length in Compile encounter “type Integer encountered in assignment of Type Real ”

Compile[{}, Module[{n}, n = Length[{1, 2, 3, 4}]; n = n/2]] The above code will emit errors Compile::cset: Variable n of type _Integer encountered in ...
1
vote
0answers
72 views

Compiled function and integration

I'm using the recursive functions defined here: MyFnc and myFncC (compiled version). I want to call this functions in the ...
2
votes
1answer
245 views

Speeding up this recursive function

I have a recursive function defined like this: ...
1
vote
1answer
92 views

Manipulating Some Lists in Compile

Consider a list of lists, such as: Z={{1,4,3},{2,1,3},{3,1,4}} Z is an $n \times n$ matrix (here $3 \times 3$) which ...
1
vote
1answer
96 views

How to do this Function with compile

There is 4 lists, 3 of them are at same length (l0, l1 and l3). ...
1
vote
1answer
103 views

Why doesn't Compile work on the Permutations function with second arguments?

Here is a narrowed-down example, the first case works, but the second one refuses to use the compiled version: ...
3
votes
1answer
79 views

Compile::cplist: error from MapThread [duplicate]

What is the cause of this error? Compile[{{r, _Integer, 2}, {d, _Integer, 2}}, pos = Position[MapThread[#1 > #2 &, {r, d}, 2], x_ /; x == True]] ...
1
vote
0answers
53 views

Compilation error: “Could not complete external evaluation at…”

I'm pretty new to trying to use Compile[], and I just can't see why I'm getting this error. I have two functions to define beforehand; one of them is a bit odd: <...
3
votes
1answer
154 views

different situations with Compilation of ConstantArray

First, we load some tools related to Compile for analysis. ...
19
votes
0answers
261 views

Compile not correctly initializing a variable defined inside Module

Bug introduced in 8.0 and persisting through 10.3.1 or later In the following example, inside the minimumX's Module, ...
5
votes
1answer
104 views

Compilation, square roots, and integers

After looking at this question, particularly this answer, I wrote my own performance test, using the two functions ...
0
votes
0answers
58 views

Error message when using a compiled function in NSum [duplicate]

Below is a simple example to illustrate the problem test = Compile[{{n, _Integer}}, n] Now, Table works fine ...
3
votes
3answers
127 views

about Compile and return type

In the mathematica document "tutorial/CompilingWolframLanguageExpressions" 1 It says about how to set return type of a called function you used in Compile. ...
6
votes
1answer
69 views

Compile Select returns “Null tensor with rank > 1 encountered at instruction 24”

This is the problematic part of one long function, wich should applyied many times to the list ...
5
votes
1answer
204 views

How to compile this code?

Could somebody teach me how to compile this code? ...
5
votes
1answer
165 views

Is it possible to change the precision in Compile?

I'm using Compile to do some numerical calculation and I need high Precision. I was wondering if it is possible to change the ...
3
votes
1answer
93 views

Is there any way to use compile and still maintain high precision in Mathematica? [duplicate]

Is there any way to use compile and still maintain Arbitrary-precision like 50 in Mathematica?
0
votes
1answer
52 views

Compile decreases the number of returned list elements

I have: LogisticMap = Compile[{μ}, ({μ, #} &) /@ Union[Drop[NestList[μ # (1 - #) &, .2, 300], 100]]]; Then: ...
0
votes
0answers
85 views

Nestlist inside Compile

My question is a continuation of question1 and question2, but I think it may be considered as a self-contained one. I am interested to make the following code faster ...
10
votes
1answer
309 views

Using Compile to speed up Function with PermutationProduct [closed]

I have the following fairly simple routine dot involving PermutationProduct that I wish to speed up using ...