Undefined function 'export_fig' for input arguments of type 'double'.

Undefined function 'export_fig' for input arguments of type 'double'.

Error in show_results (line 216) export_fig(fig_handle,[fname,'.pdf'])

Can anybody give me some insight into this error? thanks.

[Jan]

Which Matlab version are you using?

Answer 1

[Star Strider]

The ‘export_fig’ function is a popular and well-reviewed function available on the File Exchange here. You need to download it and add it to you MATLAB user path.

[Douglas]

Sorry, It works for other inputs to the program.

[Star Strider]

I’m now completely lost.

I’m not familiar with the details of export_fig and don’t use it often. Figure handles are (in my experience) always double-precision variables. If it works in other parts of the code, see if there’s a variable named ‘export_fig’ between the line that previously worked and the line that threw the error. The only possibility that I can think of is that you are somehow overshadowing it.

Answer 2

[Jan]

Set a breakpoint in this line and run the code again. If it stops there check:

which export_fig

Perhaps you reset the path temporarily or have a typo in this line.

Answer 3

[Douglas]

export_fig is called once in the program. The input is in a config file. If I change the config file export_fig will run. Sometimes, though, I get the error Undefined function 'export_fig' for input arguments of type 'double'.

Hope that is cleared.

[Star Strider]

Is the config file doing something to your path?

[Star Strider]

Douglas’s second Answer moved here:

No. The config file changes some esoteric variables but the paths are hard coded.

[Star Strider]

Either the config file is overshadowing ‘export_fig’ or it (or something else) is telling your code to look in the wrong directory for it. Those are the only things I can think of that would cause that particular problem.

Without seeing your code and the config file to see if there is a problem with one or both of them, I am out of ideas.