MATLAB: Diffrence between rem and mod

basicmodremsimple

mod(4,-10)

ans =

-6

>> rem(4,-10)

ans =

guys could you tell me in simple language whats is diffrence between two huh i know mod take the second number symbol but i didnt get the real math out of it

Best Answer

The discussion in the documentation is here.

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MATLAB: Does the MOD function from the Math Function block return unexpected results with negative inputs in Simulink

The results returned from the Simulink MOD function are consistent with the MATLAB MOD function and the description from the help:

 MOD(x,y) is x - n.*y 
 where n = floor(x./y) if y ~= 0.

As a workaround, you can use the REM function in the Math Function block. As long as the operands X and Y are of the same sign, the function mod(X,Y) returns the same result as does rem(X,Y). However, for positive X and Y, mod(-X,Y) = rem(-X,Y)+Y.

MATLAB: How to create a periodic function

Not sure what you mean by "repeated at [2,10]". Maybe this:

y = mod(x,2);
ix = y > 1;
y(ix) = 2 - y(ix);

Best Answer

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MATLAB: Does the MOD function from the Math Function block return unexpected results with negative inputs in Simulink

MATLAB: How to create a periodic function

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