Convert Hexadecimal value to signed integer

Hi, I have a .bin file in which data is stored in hexadecimal format. I want to do the following:

1. Read the hexadecimal data from the .bin file.

2. Convert the data into signed integer. For instance, if we have FF5C in the file, I want to read it and convert it into its corresponding signed integer representation which is -164.

Could anyone please show me the code to do so. Thank you in advance.

Answer 1

[Guillaume]

You haven't given enough information about your file for us to help much with question 1.

If it's a text file, use fopen, fgetl or similar and fclose. If it's a binary file, use fopen, fread and fclose.

For question 2., if it's a binary file, fread can read the data as signed integer as is. Use:

out = fread(fid, numvalues, *int16);

If it's a text file, convert your hexadecimal string with:

out = typecast(uint16(base2dec(hexstring, 16)), 'int16');

[Aresh Dadlani]

The file is binary. Thank you, it works fine now.

Answer 2

[Ulrich Moser]

The typecast command worked very well for hex-strings. Thank you for providing this code!