Re: Handling unusual number conditions

[Geraint Paul Bevan]

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Madhusudan Singh wrote:
> Hi
> 
> My measurement sometimes generates some unusual numbers. In the data file, 
> this sometimes reads as :
> 
>  Overflow
> 
> in a column full of numbers.
> 
> Can Octave handle this gracefully in some fashion ? The way I read in data is 
> to read one line at a time, and then apply str2num to that string to extract 
> the numbers.
> 
> And the output of the measurement *cannot* be modified. So any suggestions 
> other than that could be useful.
> 
> Thanks.


You can use strrep to replace all occurances of "Overflow" with "NaN"
(not a number) which str2num will happily accept:

octave> string = "1 2 3 4 5 Overflow 7"
string = 1 2 3 4 5 Overflow 7
octave> string = strrep(string, "Overflow", "NaN")
string = 1 2 3 4 5 NaN 7
octave> str2num(string)
ans =

     1     2     3     4     5   NaN     7

- --
Geraint Bevan
http://homepage.ntlworld.com/geraint.bevan

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