Hexadecimal representation of stored integer of
hex(a) returns the stored integer of
hexadecimal format as a character vector.
Fixed-point numbers can be represented as
or, equivalently as
The stored integer is the raw binary number, in which the binary point is assumed to be at the far right of the word.
Viewing fi Objects in Hexadecimal Format
The following code
a = fi([-1 1],1,8,7); y = hex(a) z = a.hex
y = 80 7f z = 80 7f
Writing Hex Data to a File
The following example shows how to write hex data from the MATLAB® workspace into a text file.
First, define your data and create a writable text file called
x = (0:15)'/16; a = fi(x,0,16,16); h = fopen('hexdata.txt','w');
to write your data to the
for k=1:length(a) fprintf(h,'%s\n',hex(a(k))); end fclose(h);
To see the contents of the file you created, use the
0000 1000 2000 3000 4000 5000 6000 7000 8000 9000 a000 b000 c000 d000 e000 f000
Reading Hex Data from a File
The following example shows how to read hex data from a text file back into the MATLAB workspace.
hexdata.txt for reading and read its
contents into a workspace variable:
h = fopen('hexdata.txt','r'); nextline = ''; str=''; while ischar(nextline) nextline = fgetl(h); if ischar(nextline) str = [str;nextline]; end end
fi object with the correct scaling
and assign it the hex values stored in the
b = fi(,0,16,16); b.hex = str b = 0 0.0625 0.1250 0.1875 0.2500 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.6875 0.7500 0.8125 0.8750 0.9375 DataTypeMode: Fixed-point: binary point scaling Signedness: Unsigned WordLength: 16 FractionLength: 16