Peaks Function (Matlab Style)
An example functions in two variables, with peaks.
peaks(v = 49, w)
v |
vector, whose length will be used, or a natural number. |
w |
another vector, will be used in |
peaks is a function of two variables, obtained by translating
and scaling Gaussian distributions, which is useful for demonstrating
three-dimensional plots.
Returns three matrices as a list with X, Y, and Z
components, the first two being the result of the meshgrid function,
and Z the application of the following function at the points of
X and Y:
z <- 3 * (1-x)^2 * exp(-(x^2) - (y+1)^2) -
10 * (x/5 - x^3 - y^5) * exp(-x^2 - y^2) -
1/3 * exp(-(x+1)^2 - y^2)
The variant that peaks() will display the 3-dim. graph as in Matlab
is not yet implemented.
peaks(3) ## Not run: P <- peaks() x <- P$X[1,]; y <- P$Y[, 1] persp(x, y, P$Z) ## End(Not run)
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.