getworldfilename uses

In the MATLAB Mapping Toolbox there is getworldfilename function. According to help it derives the worldfile name from image filename. I was thinking of creating a worldfile based on this information as I work on georeferenced images. Therefore I do the following after reading an image:

>> WN = getworldfilename(fn)

WN =

mat_test2.tfw

>> R = worldfileread(WN)
??? Error using ==> worldfileread at 28
The input worldfilename 'mat_test2.tfw' is not a file.

Using single quotes for WN also results in the same error. I can of course create a world file easily using GIS Software. But I was wondering what purpose does getworldfilename serve? Is it just limited to get the name and nothing else?

Answer 1

[Oleg Komarov]

Yes, it just creates the name.

Answer 2

[Rob Comer]

It looks like your goal is to create a new worldfile. You can use the Mapping Toolbox worldfilewrite function to do that.