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Case function in Mathematica

by omri3012
Tags: case, function, mathematica
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omri3012
#1
Dec24-11, 05:38 AM
P: 62
Does anyone familiar with a convenient way in Mathematica to define a case function such as:

[itex] y(x)=\left\{\begin{array}{c} x \\ -x\end{array}\begin{array}{c} x>0 \\ x<0\end{array}
\right. [/itex]
?

Thankes,
Omri
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phyzguy
#2
Dec24-11, 05:56 AM
P: 2,179
You want to use 'Piecewise':

y[x_]:=Piecewise[{{x,x>0},{-x,x<0}}]
omri3012
#3
Dec24-11, 08:47 AM
P: 62
Thankes,
It's very helpful :)


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