Undefined function 'graphalgs' for input arguments of type 'char'.

Hi

I always get this error (Undefined function 'graphalgs' for input arguments of type 'char' ) when I run graphconncomp , however I have graphalgs private function !!

can anyone help me please ?

Answer 1

[Walter Roberson]

The graphalgs private function you see might consist of only help documentation. graphalgs is (or was previously) implemented in compiled code. See http://www.mathworks.com/matlabcentral/newsreader/view_thread/262604

[Amani]

thank you very much I don't want to modify it, I just want to include it to run graphconncomp function

how can I check if the MEX file that I have does include only help documentation or compiled code?

[Walter Roberson]

If it is a .mex* file then it is compiled code. If it is a .m file then it might have MATLAB code or it might only have MATLAB comments used for help information.

What does

   which -all graphalgs

show?

Please show the error message and trace back to your top level source

[Amani]

it is a .mex file the error Undefined function 'graphalgs' for input arguments of type 'char'.

Error in graphconncomp (line 93) [s,c] = graphalgs('scc',debug_level,directed,G);

Error in Untitled1 (line 6) [S,C] = graphconncomp(g)

what is the problem ? I have graphalgs.mexA46 file in the run path

[Walter Roberson]

A .mexa64 file would be for a 64 bit Linux system. Perhaps you are not running on Linux, or perhaps you are using a 32 bit Linux system, or perhaps you are using Student Version which on Linux is a 32 bit program ?

[Amani]

thank you very much for this information.

yes, I'm using windows, how can I get the grapgalgs.mex for windows ??

[Walter Roberson]

It should have been included in the Bioinformatics toolbox, provided that the graphconncomp routine still calls upon it. Try reinstalling the Bioinformatics toolbox.

[Amani]

I have difficulties reinstalling bioinformatics toolbox

how can I replace graphalgs function ?

thanks

[Walter Roberson]

The product files for toolboxes are encrypted, so although you could maybe extract something from the .zip, it would not be a usable file. You need to get the installer working properly. You could call MATLAB Installation Support, which is free.