Qustion about data range selection

[Klaartje en Mathieu Melenhorst]

Dear All,

This may be a rather silly question, so please forgive me if I ask anything too trivial as I quite recently started to use Octave.

In MathCad I used the boolean "if" to change a mathematic operation, depending on the input data.

t:=0,(pi/100)..4pi

y(t):=|sin(t) if t<=2pi

         |cos(t) if t>2pi

How can this be implemented in Octave?

Help is very much appreciated.

Mathieu Melenhorst