MATLAB: About roundn() function in matlab 2013a

roundn function

In my code, I can run the roundn() function in matlab 2010b. However, when these codes are run in the matlab 2013a versio, roundn() function is failed. And it shows that this is undefined function. I have to replace roundn by vpa function.

Best Answer

roundn() is part of the Mapping Toolbox. You probably do not have that toolbox installed or licensed in your 2013a version.

There is also a roundn() File Exchange contribution; it is possible that at some point you had installed that.

Note: as of R2014b, the round() function of MATLAB was enhanced to support rounding to a particular number of digits.

Related Solutions

MATLAB: How to replace roundn

MATLAB has always had a round function, recently incorporating the functionality of roundn from the MApping Toolbox.

You can create your own version with this anonymous function:

roundn = @(x,n) 10.^n .* round(x/10.^n);

It produced the same answer for the same input as the example in the documentation for it when I tested it, so it should be a seamless replacement.

MATLAB: How to install Instrument Control Toolbox with MATLAB 2011a

In order to use a trial version, you need to have a version of MATLAB that is the same version, in order to do the installation. A trial version of MATLAB is acceptable for this purpose.

Once you have the current version of MATLAB and the current ICT installed, you can use the trial license file to run the older version. You might be able to go to your My Account page on MATLAB Central and use it to download the previous version; I am not certain the Trial license configuration supports that. I know that if you have a regular license for a toolbox then you can use the My Account page to download any previous version back to about R12.

However, the Trial licenses are granted under the condition that the possessor is evaluating the software with an aim to buy a current version. If you were to buy a current version of ICT you would need a current MATLAB to run it on. Mathworks has usually permitted people to purchase toolkits for versions no more than about 2 or 3 releases back. As you are going to need R2015b MATLAB to run your R2015b ICT you should be testing your software using R2015b MATLAB not R2011a. Even if you had an R2015b ICT installation you would not be able to use it with R2011a MATLAB, so you should be investigating what it would take to upgrade your entire software to R2015b including the ICT.

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Related Solutions

MATLAB: How to replace roundn

MATLAB: How to install Instrument Control Toolbox with MATLAB 2011a

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