Custom output of the fprintf
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Is there any way to use fprint with an exponential output field (e) for example:
%15.2e
and not get an output such as 3.00e-05 but 30.00e-06? Thank you
Accepted Answer
José-Luis
on 8 Feb 2013
Edited: José-Luis
on 8 Feb 2013
Here is a small script to do what you asked for:
val = -0.0000001245332; %for example
tempVal = abs(val);
orderOfMag = floor(log10(tempVal));
if val == 0
orderOfMag = 1;
end
offset = 1 - orderOfMag; %Here you can change the number of digits to the left of the point. for three replace one by two, e.g.
valueToPrint = val.*10.^offset;
precision = 6; %number of display digits
expPrecision = 3; %number of digits in the exponent
if orderOfMag > 0
formatStr = ['%0' num2str(expPrecision) 'i'];
else
formatStr = ['-%0' num2str(expPrecision) 'i'];
end
your_string = [num2str(valueToPrint,precision)...
'e' ...
sprintf(formatStr,abs(orderOfMag-1))];
2 Comments
More Answers (1)
Image Analyst
on 8 Feb 2013
That does not seem to be one of the format specifier options built in. See formatSpec section of the fprintf() help documentation. It would be nice if it were though. I've seen other programs where you can specify "Scientific notation" where the exponent can be any number, and "Engineering Notation" where the exponent is a multiple of 3.
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