[R] curve
Duncan Murdoch
murdoch at stats.uwo.ca
Thu Apr 15 15:28:40 CEST 2010
On 14/04/2010 4:59 PM, Dwayne Blind wrote:
> Dear R users,
>
> How can I use "curve" with a function of two variables ?
>
See Ben Bolker's reply if you want to plot a surface. If you want to
plot a curve by holding one of the two variables fixed, just set it to a
constant value, and use "x" as the other variable, e.g.
f <- function(x, y) { x^2 + y^2 }
curve(f(x, 2), from= .... )
curve(f(3, x), from= .... )
or wrap the function in a one variable function if you want to follow
some complicated path, e.g.
curve(function(t) f(t, t^2), from=....)
Duncan Murdoch
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