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Print number as .0000000E+00

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Hamilton
Hamilton on 18 Jun 2013
I would like to print a number with the following format:
.0000000E+00
MATLAB prefers the following:
0.0000000E+000
Is there a way to solve this issue?

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Accepted Answer

Jan
Jan on 18 Jun 2013

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Hamilton
Hamilton on 19 Jun 2013
This is helpful removing the leading zero. Is there a way to maintain the exponential format? I think i can take care of the E+000 to E+00 issue by simply using some string modification functions.
Jan
Jan on 19 Jun 2013
Perhaps something like this:
char(java.text.DecimalFormat('#,##0.###E00').format(0.1));

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More Answers (1)

Pourya Alinezhad
Pourya Alinezhad on 18 Jun 2013
fprintf('%1.5s',0.1)
1.5 stands for 5 decimal places.1 is for full number.
s==scientific
you could easily find a way to this problem if you were a c proogrammer...

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Jan
Jan on 18 Jun 2013
No, according to the documentation '%s' means 'string', not 'scientific'. I assume you mean '%e' for the scientific notation.
But to my surprise the output is exactly the same (tested under 2009a, 2011b). This means that '%s' has the undocumented feature to act like '%e' when it gets numbers as input. Strange.
Anyhow, Hamilton asks for an omitted leading zero and a 2 digit exponent. While the first is ugly and provokes unexpected errors, such that it will hopefully not implemented, the second is the default in non-PC versions of Matlab and in the newest release R2013a.
Pourya Alinezhad
Pourya Alinezhad on 18 Jun 2013
actually i didn't checked this code in matlab.i used to code in this way in turbo c.and i per-assumed that this is true in matlab :)
Jan
Jan on 19 Jun 2013
@Pourya: And obviously your assumption is not really wrong. Thanks for this interesting new piece of information.
Of course TMW did not implement fprintf from scratch but relies on existing libraries. Therefore even known bugs like buffer overflows and other undocumented features like %s with numbers appear in Matlab.

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