Significant Figures
[strOut] = sigfig(num, nSigFig, dummy)
Rounds number to nSigFig number of significant figures and outputs a string Dummy in 3rd argument to have padded zeros
Lim Teck Por, 2006, 2008,2009
Apropos: mat2str, num2str, sprintf
This code serves as a workaround to rounding problems probably caused by converting from base 10 to base 2 prematurely (Note that this problem can also be found in C and python) and print zero padding:
num2str(3.15, 2)
mat2str(3.15, 2)
fprintf('%1.2g\n', 3.15)
sprintf('%1.2g\n', 3.15)
give 3.1 instead of 3.2 whereas an input of 3.75 gives 3.8.
sigfig(3.15, 2) gives "3.2"
sigfig(3.75, 2, []) gives "3.8e+0"
Cite As
Teck Por Lim (2024). Significant Figures (https://www.mathworks.com/matlabcentral/fileexchange/10669-significant-figures), MATLAB Central File Exchange. Retrieved .
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Version | Published | Release Notes | |
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1.8.0.0 | Support for Inf and -Inf |
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1.6.0.0 | Allowed default nargin < 2 to mean number of significant figures = 3
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1.5.0.0 | Updated description. |
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1.4.0.0 | Fixed bug with sigfig(99.9999,2).
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1.3.0.0 | Bug fixed. |
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1.0.0.0 | To enable sigfig(nan) |