MATLAB: Function name

addpathfunction

Why is it that a function does not work with some names? e.g. I named one of my functions magnuson(PathName) and the function would not work, it would return an error saying:

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

Then after changing the name of the function to magnuson_LA(PathName) it worked perfectly. Why is this?

Best Answer

Usually that error comes when the function has been saved on path that MATLAB cannot reach.

Matlab checks for functions in the current directory and a saved list of paths.

To add a path to the search:

addpath('C:\...\')

I would recommend to read this guide: Making Files and Folders Accessible to MATLAB

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MATLAB: Is MATLAB 7.0.4 (R14SP2) unable to recognize the files, when I use the COPYFILE command in the script

This bug has been fixed in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:

This has been verified as a bug in MATLAB 7.0.4(R14SP2) in the way COPYFILE notifies MATLAB about the changes made to a destination directory.

The followings are some workarounds to resolve the issue:

1. Using an absolute path name:

Use an absolute path name as an input to functions(TYPE in this case) accessing the destination directory as follows:

FullPathTempDir = tempname; 
[temp_dir temp_file] = fileparts(FullPathTempDir); 
mkdir(FullPathTempDir); 
destinationFile = [temp_file,'.m']; 
origPath = addpath(FullPathTempDir); 
copyfile('hSampleDisp.m',fullfile(FullPathTempDir,destinationFile)); 
type(fullfile(FullPathTempDir,destinationFile));

2. Use WHICH or EXIST on the path of the destination directory as follows:

FullPathTempDir = tempname; 
[temp_dir temp_file] = fileparts(FullPathTempDir); 
mkdir(FullPathTempDir); 
destinationFile = [temp_file,'.m']; 
origPath = addpath(FullPathTempDir); 
copyfile('hSampleDisp.m',fullfile(FullPathTempDir,destinationFile)); 
which temp_file
type(temp_file);

3. CD to the directory, in which the file is located, before accessing the file.

MATLAB: Is the MATLAB path cleared when I try to add a directory using the PATHTOOL or ADDPATH functions in MATLAB 7.0 (R14)

This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:

This has been verified as a bug in MATLAB 7.0 (R14) in the way that MATLAB handles an environmental variable called ICU_DATA on the system PATH.

For information about how to resolve this issue, see the following solution:

http://www.mathworks.com/support/solutions/data/1-OXSGQ.html?solution=1-OXSGQ

Best Answer

Related Solutions

MATLAB: Is MATLAB 7.0.4 (R14SP2) unable to recognize the files, when I use the COPYFILE command in the script

MATLAB: Is the MATLAB path cleared when I try to add a directory using the PATHTOOL or ADDPATH functions in MATLAB 7.0 (R14)

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