FW: parametric functions&surfaces

[Alessandro Bandera]

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-----Original Message-----
From: Alessandro Bandera [mailto:abandera1 at alice.it] 
Sent: venerdì 2 maggio 2008 11.38
To: 'help-octave-request at octave.org'
Subject: parametric functions&surfaces

Sorry in advance if I bother you,

 

But I need to plot or mesh a simple function f(x) for instance for
x=(0:0.1:1)’; y=sqrt(1-x^2).

Since the competence I have at the moment..no way. Tried in different ways
with cos e sin but no way to plot a quarter of a circle o quarter of
cylinder
help! Even tried with parametric forms : x=(1-t^2)/(1+t^2) and
y=2*t/(1+t^2) but the results were far from expected( t is a vector then I
know that t^2=t*t')

 

Alessandro