1d3 = 1e3 = 1000? in matlab
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Hi everyone!
I want know what's difference between 'd' and 'e' in matlab.
Sincerely, JH Jung
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Accepted Answer
Walter Roberson
on 14 Feb 2014
Historical support. I don't think the "d" form is even documented now. The "D" form was common in FORTRAN in the 1960's.
More Answers (1)
Jan
on 14 Feb 2014
Edited: Jan
on 24 Feb 2021
Last year the technical support answered, that the following number formats are working, but not documented:
2.
.2
.2e3
.2e+03
-.2E3
2d3
.2e2.*2.
2..*.2
5 Comments
Walter Roberson
on 23 Feb 2021
FORTRAN E format was (originally) single precision for constants and D format was double precision. For example
COMMON/ABC/3.2e-1,3.2d-1/
initialized a single precision followed by a double precision
Jan
on 24 Feb 2021
@Yukteshwar Baranwal: As I have written in my answer, I've asked the support, because I did not find an explanation in the documentation, if the mentiones notations are accepted.
Tme MathWorks answered, that only the formats are guaranteed to work, which are created as output of sprintf(). Therefore I do not use leading or trailing dots in numerical constants and stay at "e" or "E" for the exponent.
Nevertheless, fscanf accepts these notations and M-code is interpreted correctly also. But I stay at the documented syntax, because this is no drawback.
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