Is it possible to cast the id of a file?

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Javier Naranjo
Javier Naranjo 2017-12-12
编辑： Jan 2017-12-12
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!
  1 个评论
Rik
Rik 2017-12-12
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.

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Jan
Jan 2017-12-12
编辑：Jan 2017-12-12
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.

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