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How to display text in a plot as scientific number

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Ziv Kassner
Ziv Kassner on 30 Aug 2020
Commented: Ziv Kassner on 30 Aug 2020
How do I display a very small/large number in text command as a number with 2 digits after the decimel point?
e.g. 5.42e-6 rather than 0.00000542 or 5.4200e-06
thanks,
Ziv

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Accepted Answer

dpb
dpb on 30 Aug 2020
Use a format string to create specific format desired...
>> sprintf('%.2e',pi*1E6)
ans =
'3.14e+06'
ergo, use
text(x,y,sprintf('%.2e',valueToPrint))
There's also num2str, compose that have some additional flexibility for specific uses...

More Answers (1)

Adam Danz
Adam Danz on 30 Aug 2020
Edited: Adam Danz on 30 Aug 2020
n = 0.00000542;
nStr = num2str(n, '%.2e');
cla()
text(.1, .1, nStr)
% alternatively,
text(.5, .1, sprintf('%.2e', n))

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