"When I load a struct I've previously saved to a .mat file, I've specified a generic name for the struct before, say fileStruct. I'd like to open the struct via load, and have the name of the struct be more specific, like "fileStructA""
So far no one has mentioned the likely cause of this all: forcing meta-data into the structure name.
This situation commonly occurs when beginners import MAT files in a loop and overwrite the imported data on each iteration... so they imagine that the only solution is to rename the imported data variable on each loop iteration, usually wanting "the same name as the file" or some such similar idea. This approach is https://en.wikipedia.org/wiki/Anti-pattern
In fact code will be simpler, more efficient, and much more robust when the names (either in the files or in the workspace) do not change on each loop iteration, and instead use simple indexing on each iteration, just like the MATLAB documentation shows:
