string equivalent of fread

Hi -

I can use

rawData = fread(fid,[59 59])

to read 59 bytes from a binary file, 59 times, convert to decimal, and put results into a 59 X 59 array.

I want to do the same, but read each hex byte literally into a string, i.e. 01 FF -> '01' 'FF', keeping the 59 X 59 structure (i.e. - 1st row: 1st 59 bytes in file as strings, keeping leading zeros; 2nd row: next 59 bytes in file as strings, keeping leading zeros; etc...)

The idea is that I want to combine some columns of strings into longer strings, convert to hex, then convert the hex to decimal.

. . ."AB" "01" . . . -> "AB01" -> AB01 -> 43777 (may not need all steps)

. . ."CC" "02" . . . -> "CC02" -> CC02 -> 52226

etc..

unknown number of rows, where "AB" and "CC" are in column 8, and "01" and "02" are in column 9.

Thoughts?

Answer 1

[Jan]

You cannot use FREAD to read a byte from a file and convert it to something like '01' of 'FF'. FREAD reads binary data, but the conversion to a HEX string is a kind of high-level operation. This is a job for FSCANF.

Or read bytes and convert them afterwards:

data = fread(fid, [59,59], '*uint8');
xdata = sprintf('%.2x', data);  % And a RESHAPE on demand.