[Maxima] Problem with plotting function defined condionally
Olive
not0read0765 at yopmail.com
Sat Jun 7 08:15:25 CDT 2008
I define the following function (the cubic root of x):
(%i1) croot(x) := if x>0 then x^(1/3) else -(-x)^(1/3) $
if I try to plot this function; I obtain only a graph for x>0, the
negative part is left blank on the graph:
(%i2) plot2d(croot(x),[x,-5,5]);
However, all symbolic and numeric usage of this function works as expected:
(%o2)
(%i3) croot(5);
1/3
(%o3) 5
(%i4) croot(-5);
1/3
(%o4) - 5
(%i5) ev(croot(-5),numer);
(%o5) - 1.709975946676697
(%i6) croot(125);
(%o6) 5
(%i7)
Could someone point me in the right direction? It appears to happens
only with some function defined conditionally.
Olive
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