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    %% 3-D Plots
% This example shows how to plot surfaces in MATLAB(R).

% Copyright 1984-2014 The MathWorks, Inc.

%% Mesh Plot of Peaks

z = peaks(25);
mesh(z);
colormap(hsv)

%% Surface Plot of Peaks

z = peaks(25);
surf(z);
colormap(jet);

%% Surface Plot (with Shading) of Peaks

z = peaks(25);
surfl(z);
shading interp;
colormap(pink);

%% Contour Plot of Peaks

z = peaks(25);
contour(z,16);
colormap(hsv)

%% Quiver

x = -2:.2:2; 
y = -1:.2:1;
[xx,yy] = meshgrid(x,y);
zz = xx.*exp(-xx.^2-yy.^2);
[px,py] = gradient(zz,.2,.2);
quiver(x,y,px,py,2);

%% Slice

[x,y,z] = meshgrid(-2:.2:2,-2:.25:2,-2:.16:2);
v = x.*exp(-x.^2-y.^2-z.^2);
xslice = [-1.2,.8,2]; 
yslice = 2; 
zslice = [-2,0];
slice(x,y,z,v,xslice,yslice,zslice)
colormap hsv