MATLAB: Coloring

contourcontourfMATLAB

Suppose I have a code that plots contour lines. How might I color in the the region say of altitude >h?

Many thanks.

Best Answer

I would use contour with specification of level and combine with hold on.

Take al look to the documentation

http://www.mathworks.de/help/techdoc/ref/contour.html

contour(Z,v) draws a contour plot of matrix Z with contour lines at the data values specified in the monotonically increasing vector v. The number of contour levels is equal to length(v). To draw a single contour of level i, use contour(Z,[i i]). Specifying the vector v sets the LevelListMode to manual to allow user control over contour levels.

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MATLAB: Coloring with coordinates.

x_data = [3/8 4 8 16 30 50 100];
uppery = [100 100 100 85 60 30 10];
lowery = [100  95  80 50 25  5 0];
x = [x_data fliplr(x_data)] ; 
y = [uppery fliplr(lowery)] ; 
semilogx(x,y);
hold on
fill(10.^log10(x),y,'y')

MATLAB: Coloring in plots,legend

mu = [25 45];
sigma = [20 10; 10 50];
x1 = 0:1:50;
x2 = 0:1:180;
[X1,X2] = meshgrid(x1,x2);
X = [X1(:) X2(:)];
y = mvnpdf(X,mu,sigma);
y = reshape(y,length(x2),length(x1));
mu_jugo = [10 130];
sigma_jugo= [15 5; 5 30];
y_jugo = mvnpdf(X,mu_jugo,sigma_jugo);
y_jugo = reshape(y_jugo,length(x2),length(x1));
%% 
surf(X1,X2,y,'FaceColor','g');
colormap winter;
hold on;
set(gca,'FontName','Times','FontSize',12)
surf(X1,X2,y_jugo);
set(gca,'FontName','Times','FontSize',12)
legend('Bura','Jugo');
axis tight

Best Answer

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MATLAB: Coloring with coordinates.

MATLAB: Coloring in plots,legend

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