I am trying to use sparseinv (sparseinv​,sparseinv​_install, parseinv_test) but it gave me an error.

I am trying to use sparseinv (sparseinv,sparseinv_install, parseinv_test) but it gave me an error. Any help would be much appreciated.

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Undefined function or variable 'sparseinv_mex'.

Error in sparseinv (line 59)
[Z takflops] = sparseinv_mex (L, d, U', Zpattern) ;

===========================

[James Tursa]

Did you run sparsinv_install to compile the mex routine? The error message states that it cannot find the compiled mex routine.

Answer 1

[Mojgan Soltan]

Yes, after I run it gave me this error

=========================

>> sparseinv_install
Error: File: sparseinv_install.m Line: 1 Column: 50
Unexpected MATLAB operator.

 =============================

[Walter Roberson]

Could you confirm that you are using the sparseinv from https://www.mathworks.com/matlabcentral/fileexchange/33966-sparseinv--sparse-inverse-subset ?

[Walter Roberson]

Please do not start a new Answer to add a response. You should click on "Comment on this Answer" instead.

[Walter Roberson]

At the command line, please command

dbtype sparseinv_install

and show us the output.

When I downloaded the code a moment ago, line 1 of sparseinv_install does not even have 50 characters.

[Walter Roberson]

Odd, when I look at your copy of sparseinv_install I can see that it does not have 50 characters on line 1 either.

What shows up for

which -all sparseinv_install

[Mojgan Soltan]

Yes, you are right it is odd. anyway I am going to delete them and get them again. is there any other code which I can replace with this (Sparse inversion) if the previous one not works in mine.

Answer 2

[Mojgan Soltan]

Yes, that exactly I got it from.

Answer 3

[Mojgan Soltan]

I put all 3 of them in one directory

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>> dbtype sparseinv_install

1     function sparseinv_install
2     %SPARSEINV_INSTALL compiles and installs the sparseinv function.
3     % Your current working directory must be the sparseinv directory for this
4     % function to work.
5     %
6     % Example:
7     %   sparseinv_install
8     %
9     % See also sparseinv, sparseinv_test
10    
11    % Copyright 2011, Timothy A. Davis, http://www.suitesparse.com
12    
13    is64 = ~isempty (strfind (computer, '64')) ;
14    if (is64)
15        fprintf ('Compiling sparseinv (64-bit)\n') ;
16        mex -largeArrayDims sparseinv_mex.c sparseinv.c
17    else
18        fprintf ('Compiling sparseinv (32-bit)\n') ;
19        mex sparseinv_mex.c sparseinv.c
20    end
21    addpath (pwd)

=============================================

[Walter Roberson]

Please do not start a new Answer to add a response. You should click on "Comment on this Answer" instead.