Sadly as GSL does it's LU decompositions in place I'm not sure that it's possible to do it without copying the submatrix out of A first if you require it not to be modifed. You can, however, use a matrix view to construct the inverse directly from the LU decomposition...

How about reversing the sorted vector? As in using gsl_vector_reverse. Simple test case as follows: #include <stdlib.h> #include <stdio.h> #include <gsl/gsl_sort_float.h> #include <gsl/gsl_rng.h> #include <gsl/gsl_vector.h> void pvec(const char *str, const gsl_vector *v, const int n) { int i = 0; printf("%s", str); for (i = 0; i < n; ++i)...

You definitely should not be incurring references to either __infinity, (which is what would translate to a DLL import reference of _imp____infinity), or to _impure_ptr, within a clean MinGW build of GSL. For the record, I just downloaded gsl-latest.tar.gz, unpacked it and did, (using a Linux hosted gcc-4.8.2 mingw32-cross-compiler): $...

You can't cast class member functions into gsl_function without a wrapper. You must use global functions. In this case, the second example shown on the GSL documentation you linked is the standard way to use the library if you can't provide the function first derivative (otherwise check the first example)....

I got this from the ubuntu forums. The order of the arguments togcc might be the issue gcc -o program program.c `gsl-config --cflags --libs` ...

One major difference between your two solution methods is that when you use gnuplot, you're doing a fit to set the coefficients and the plotting the function from there in the same program, whereas with GSL you're copying the numbers from one program to another. If you're using the output...

No. It seems as if there is no routine to directly calculate the pseudo-inverse of a matrix (although here you can find a discussion on how one could get it). However, the explicit pseudo-inverse itself is seldom required. Instead, gsl provides the routine int gsl_linalg_SV_solve (const gsl_matrix * U, const...

c++,exception,wrapper,handle,gsl

I think my comment solves the problem, but I will summarize it here to close the question. GSL function is just a typedef to the following c-struct struct gsl_function_struct { double (* function) (double x, void * params); void * params; }; typedef struct gsl_function_struct gsl_function ; Then, it is...

According to the documentation, gsl_sort_vector_largest_index takes a size_t * as its first argument, not uint_8 *. Change your code to use size_t instead of uint_8 and you should be good to go....

Here's an example which uses random-fu: import Data.Random -- for randomness import Text.Printf -- for printf import Data.Foldable -- for the for_ loop -- pdf and cdf are basically “Distribution -> Double -> Double” main = do -- defining normal distribution with mean = 10 and variation = 2 let...

The easiest way (if you are restricted to that library) would be to pad your matrix with rows of zeros to N x N, which you can then pass to your function. The padded matrix will have the same null space.

Something like this works on my PC: allows you to load a grayscale JPG image using libjpeg. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <jpeglib.h> #include <gsl/gsl_matrix.h> gsl_matrix *load_jpg_image(const char *pFileName) { FILE *pFile; long jpegSize; unsigned char *pJpegBytes, *pPixels; struct jpeg_decompress_struct cinfo; struct jpeg_error_mgr jerr; int status, w, h,...

heres an example, integrating 1/(t^2 + 1) over [0,1000]. It uses adaptive integration with the simplest ruleset since there are no singularities. #include <stdio.h> #include <math.h> #include <gsl/gsl_integration.h> double f (double x, void * params) { double alpha = *(double *) params; double f = alpha / (x * x...

Check your cmake/Modules directory permissions. You don't have execute permissions for directory so you can read file if you have full path to it, but you can't find it: > ls cmake/Modules/FindMy.cmake cmake/Modules/FindMy.cmake > cat CMakeLists.txt cmake_minimum_required(VERSION 3.0) project(Foo) list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules") find_package(My REQUIRED) > cmake -H. -B_builds ... OK...

windows,mingw,linker-error,gsl

When you build projects for MinGW, under MSYS, you should always specify a --prefix argument to ./configure; (the /usr/local default specifies an MSYS specific path, which is entirely unsuitable for MinGW application development). In your case, you should have configured GSL thus: ./configure --prefix=C:/MinGW or, better still, segregate the build...

The API in that package doesn't seem to offer any operations that return updated seeds (which is obviously a big no-no when doing randomness in a pure language). You will have to patch the package to return updated seeds or use a different package.

It really is the order of arguments in y. In the cited source it was in the "natural" order, the reason for your mix is not really clear. Giving names to some sub-expressions, the ODE function might also be written as int func(double t, const double y[], double f[], void...

android,c++,linux,android-ndk,gsl

I replied on your other post also regarding gsl. Please follow that procedure. I hope it will help you and you can easily use that static lib in your android app.

I created a working example (and timed it against C) in which you can pass an arbitrary user-defined R function to the GSL function QAWF. You should be able to generalize it to other gsl functions as well. See the example here: https://sites.google.com/site/andrassali/computing/user-supplied-functions-in-rcppgsl As noted above, the competing C implementation...

CMake is not designed to be used in this way, and it is highly unlikely you will be able to use it in this way. CMake performs system introspection, storing this in the CMake cache, and uses full paths to most things. I would advise you to run CMake on...

I compiled Successfully. I compiled static libraries and then used the mergelib to merge gsl and cblas. It worked perfectly for me. For merging you need to change the ar and ranlib in the mergelib file to arm-linux-androideabi-ar and arm-linux-androideabi-ranlib respectively. For compiling GSL, follow this method to set the...

You could use std::copy() to do this. #include <iostream> #include <gsl/gsl_matrix.h> using namespace std; int main(void){ double data[] = {1,2,3,4}; gsl_matrix *m = gsl_matrix_alloc(2,2); copy(data, data+4, m->data); printf("Matrix:\n%f %f\n%f %f\n", gsl_matrix_get(m, 0, 0), gsl_matrix_get(m, 0, 1), gsl_matrix_get(m, 1, 0), gsl_matrix_get(m, 1, 1)); return 0; } ...

From https://www.gnu.org/software/gsl/manual/html_node/Matrices.html gsl_matrix is defined as: typedef struct { size_t size1; size_t size2; size_t tda; double * data; gsl_block * block; int owner; } gsl_matrix; And The number of rows is size1. The range of valid row indices runs from 0 to size1-1. Similarly size2 is the number of columns....