Re: Thanks Re: Loading hex data

[Philip Nienhuis]

ionavideo wrote
> 
> Thanks. I really appreciate the suggestions. I tried both dlmread and
> textread. With textread I get an "error" I can sort of work with.
> 
> Here is the data file keydata.txt:
> 32
> 51
> 0b
> a9
> ba
> 
> So we have 5 hexadecimal numbers separated by CR-LF
> 
> And here is the Octave line:
> 
> k= hex2dec(textread("keydata.txt", "%d"))
> 
> And the output from running the test program is:
> k =
>     0
>     3
>     0
>     0
>     0
>     
> Which is not a correct translation of "32 51 0b a9 ba" because
> 32 hex equals 50 dec or the ascii "2"
> and 51 hex equals dec 81 or ascii "Q", etc.
> 
> Yes, I tried other ways to format the line, as follows:
> 
> #k= hex2dec(textread("keydata.txt", "%x"))
> # the above gives "error: Invalid call to hex2dec. Correct usage is
> hex2dec(S)
> 
> #k= hex2dec(textread("keydata.txt", "%s"))
> #the above gives several errors, including: 'string undefined ... called
> from 
> # ... toascii.m
> # error evaluating argument list element number 1
> # error ... strjust.m
> # error ... base2dec.m
> # errpr ... hex2dec.m
> 

Looks like a bug somewhere, but unclear whether it is in textread. See below



> ---------------------------------------------------------
> So my question is, should I be using
>     %s
> or
>     %d
> 

%s

What Octave version do you use?

And what is the output of:
  textread("keydata.txt", "%s")
?


Philip



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