plotting outline boundary of gridded value data.

Hello Matlab Community,

I am trying to plot the outline boundary of this data set, I am not able get it.

here I am adding the data set and sample plot where I want to plot the outline boundary of the current image.

can anybody help me on this.

thanks in advance.

Answer 1

[Voss]

load('test_data_for_boundary.mat');

surface(x,y,data_zh11)
hold on

idx = ~isnan(data_zh11);

good_x = x(idx);
good_y = y(idx);

b = boundary(good_x,good_y);

plot(good_x(b),good_y(b),'--r','LineWidth',3)