On 30/04/2016 1:48 PM, T.Riedle wrote:
Dear R users,
I am trying to generate a 3D surface plot given the inflator formula in the
attached file.
Now, I want to create a 3D plot showing how Delta changes with the values of
Abs(B) and sigma. The other variables in the formula are constant. Delta is
calculated daily therefore the subscript t which denotes the day. I have used
different functions and different packages but I get either wrong results or an
error in R.
Does anyone have an idea which function I should use?
One way is to create a function of two arguments, e.g.
f <- function(x, y) x^2 + y^2
This function needs to be "vectorized", i.e. if x and y are vectors, it
needs to pair the values and produce a vector as an answer. Then
library(rgl)
persp3d(f)
will do a perspective plot of it. There are a lot of optional arguments
to set the range of x, y, labels, colours, etc.
Duncan Murdoch
Furthermore, I think I have to create a matrix using the formula above but I do
not know how to do that in this connection. Can any body help me with the code
for this purpose?
Thanks a lot in advance.
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