Round values after the decimal point
Useful helper function that rounds scalars, vectors or matrices smaller/bigger than zero at a defined place after the decimal point.
Needs two input arguments to work properly: out = sRound(val, precision)
Usage: out = sRound(val, prec)
Example1: a = sRound(0.46,1);
a = 0.5000
Example2: b = sRound(-5.478,2);
b = -5.4800
Example3: c = sRound([0.8236 2.6958 3.3171 0.9502 0.0364], 3);
c = 0.8240 2.6960 3.3170 0.9500 0.0360 0.34330
Example4: d = sRound([-0.1694 -1.4351 0.3925; -0.0522 -2.6 1.3433], 3);
d = -0.1690 -1.4350 0.3930
-0.0520 -2.6000 1.3430
Example5: e = sRound(3.5);
e = 4
This code should run with every MATLAB version.
Cite As
Tobias Otto (2021). Round values after the decimal point (https://www.mathworks.com/matlabcentral/fileexchange/31209-round-values-after-the-decimal-point), MATLAB Central File Exchange. Retrieved .
Comments and Ratings (3)
MATLAB Release Compatibility
Platform Compatibility
Windows macOS LinuxTags
Acknowledgements
Inspired: Average_precision(Outputs,test_target)
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!Discover Live Editor
Create scripts with code, output, and formatted text in a single executable document.
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)
* The expanded user info is helpful.
* You are right: NARGIN > 2 is caught by Matlab already.
* While "prec=10^prec" is indeed necessary, "res=val - floor(val)" and adding the fractional and integer part afterwards again is not. I get the same result by: "prec = 10^prec; out = round(val * prec) / prec;".
Hi Jan, thank you for your Comments and suggestions.
* I've added more user info and examples
* Error handling for nargin>2 is done by MATLAB. Please check:sRound(3.21,2,2)
??? Error using ==> sRound
Too many input arguments.
Everything else is handled in sRound.
* prec = 10^prec; is necessary for my function to work. Please double check my code or simply comment out the line and check yourself.
See also: http://www.mathworks.com/matlabcentral/fileexchange/6077-round2 and http://www.mathworks.com/matlabcentral/fileexchange/6076-fix2.
The checks for the number of inputs does not catch more than 2 inputs. "if nargin==1, prec=0; elseif nargin ~= 2, error(), end" would be exhaustive.
Splitting the input into integer and fractional part is not needed. "prec = 10^prec;
out = round(val*prec)/prec;" would be sufficient.
It would be helpful, if you explain the type and dimensions of the accepted input (DOUBLE and SINGLE? Arrays or just scalar?).