Is it possible to cast the id of a file?

Hello!

I want to open a file and by default de id is a double type.

I want to cast that value to single for example

f = single(fopen(filename,'r'));

But when I use fread

vector = fread(f,'short');

I get this result

Error using fread
Invalid file identifier. Use fopen to generate a valid file identifier.

Is there any way to solve this problem? Or is it mandatory to have a double for that variable?

Thanks in advance!

[Rik]

Why would you want to cast it to single? Apparently it needs to be a double, but why would you want to change it? In future releases it might even be changed to an object, just like was done with handles.

Answer 1

[Jan]

No, file handles are expected to be of type double - as you have demonstrated with code.

I cannot imagine, why casting the file handle to another type could be useful. Please explain, which problem you want to solve by this.