A sample function of two variables.
Syntax
Z = peaks;
Z = peaks(n);
Z = peaks(V);
Z = peaks(X,Y);
peaks;
peaks(N);
peaks(V);
peaks(X,Y);
[X,Y,Z] = peaks;
[X,Y,Z] = peaks(n);
[X,Y,Z] = peaks(V);
Description
peaks
is a function of two variables, obtained by translating and scaling Gaussian distributions, which is useful for demonstrating mesh
, surf
, pcolor
, contour
, etc.
Z = peaks;
returns a 49-by-49 matrix.
Z = peaks(n);
returns an n
-by-n
matrix.
Z = peaks(V);
returns an n
-by-n
matrix, where n = length(V)
.
Z = peaks(X,Y);
evaluates peaks
at the given X
and Y
(which must be the same size) and returns a matrix the same size.
peaks(...)
(with no output argument), plots the peaks function with surf
.
[X,Y,Z] = peaks(...);
returns two additional matrices, X
and Y
, for parametric plots, for example, surf(X,Y,Z,del2(Z))
. If not given as input, the underlying matrices X
and Y
are:
[X,Y] = meshgrid(V,V)
where V
is a given vector, or V
is a vector of length n
with elements equally spaced from -3 to 3. If no input argument is given, the default n
is 49.
See Also
meshgrid
, surf
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