Integers only

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Raviteja
Raviteja on 6 May 2011
I have an application in which I have to use completely integer data format. Without using floor,Ceil,fix etc for each and every variable, how can I write a single command so that entire program can perform only in integer mode.?

Answers (2)

Walter Roberson
Walter Roberson on 6 May 2011
Sean de's answer unfortunately is not sufficient for your purposes.
There is no command or setting that you can use in MATLAB to force the use of all integers. For example
K = K + 1
would interpret the 1 as a double precision number (but would convert it to integer if K is an integer data type.)
Some operations such as mean() internally convert values to double precision, as adding a number of integers is likely to produce integer overflow.
Your options are to use the Fixed Point Toolbox, or to use Embedded MATLAB.

Sean de Wolski
Sean de Wolski on 6 May 2011
just define it as integer:
intdata = int64(double_data);
  3 Comments
Sean de Wolski
Sean de Wolski on 6 May 2011
Out of curiosity, what version Walter? They work for me in 2009b.
Teja Muppirala
Teja Muppirala on 7 May 2011
64-bit arithmetic was added in 2010b.
This will not work in 2010a or earlier:
x = int64(5)
x = 2*x

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