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Topic: how to round to 2 decimal?
Replies: 9   Last Post: Nov 14, 2013 8:24 PM

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PAR

Posts: 273
Registered: 12/7/04
Re: how to round to 2 decimal?
Posted: Mar 4, 2008 10:39 AM
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roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in
message <fqjpru$lpj$1@canopus.cc.umanitoba.ca>...
> In article <fqjpgm$3hp$1@fred.mathworks.com>, Deo
<spliers@hotmail.com> wrote:
> >hey, how can I set my matlab program to round all the
> >double numbers to 2 decimals

>
> You cannot. There is no exact representation in floating point
> for .01, .02, up to .99, except for 0.25, 0.50, and 0.75 which
> have exact representations. If you were to try to round
> (say) pi to 2 decimal places then the value stored internally
> would not correspond to 3.14 but instead to approximately
> 3.14 + 2e-15
>
> If you are only attempting to change what is displayed when
> you specifically ask to output something, then you can
> format the numbers using num2str or sprintf() using a format
> such as '%0.2f' .
> --
> So you found your solution
> What will be your last contribution?
> -- Supertramp (Fool's Overture)



x = round((x*100))/100



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