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How to show just part of a line
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When I draw a line base on a function, I can't figure out how to just show part of the line. Eg. I only want to show where Y and X > 0.
Please help. Thnx.
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the proposed command is OK for the condition x> 0. If x and as well y have to be positive a supplementery condition for y is needed (it is not needed for y=3x2 but it is for e.g. y=3x+2).
A solution for that line is f(x)=3x+2 and g(x)=If[f>0 && 0<x<=∞, f].
In both answers you'll notice that you have to cover the line by a function, in order to define the conditions.
the proposed command is OK for the condition x> 0. If x and as well y have to be positive a supplementery condition for y is needed (it is not needed for y=3x2 but it is for e.g. y=3x+2).
A solution for that line is f(x)=3x+2 and g(x)=If[f>0 && 0<x<=∞, f].
In both answers you'll notice that you have to cover the line by a function, in order to define the conditions.
Or also a simpler g(x)=If[f>0 && x>0, f]
(three keystrokes less  for lazy people :D )
chi sa che un giorno a Linz una persona riuscira a creare valore piu largo che infinito...
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