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How to specify the color of this contourf plot?

조회 수: 5(최근 30일)
Leon
Leon 2021년 9월 3일
댓글: Bjorn Gustavsson 2021년 9월 3일
I'm trying to plot the landmask (logical 0 or 1) using a uniform color. Below is my code:
% Turning the landmask from logical to numerical.
M = NaN(landmask);
M(landmask) = 1;
[C1, h1] = m_contourf (X, Y, M, [1, 1]); %This is the contour I need help with.
hold on
% another contourf plot:
[C2, h2] = m_contourf (X, Y, Z2, [-5:1:45], 'LineStyle', 'none' );
caxis([0 45]);
How do I specify the color of the first contour to a uniform color of [0.7 0.7 0.7]?
I tried the below and it did not work.
[C1, h1] = m_contourf (X, Y, M, [1, 1], 'color', [0.7 0.7 0.7] );
Right now, its color is basically dictated by the "caxis([0 45])" command the same way as the 2nd contourf plot.
Thanks.

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Bjorn Gustavsson
Bjorn Gustavsson 2021년 9월 3일
Maybe you can avoid the problem by using fill or patch by extracting the coordinates of the perimeters of the landmask?
Something like this:
[C1, h1] = m_contourf (X, Y, M, [1, 1]);
i1 = 1;
i2 = C1(2,i1);
idxPatch = 1;
while i1 < size(C1,2)
i2 = C1(2,i1);
i1 = i1+1;
hF(idxPatch) = fill(C1(1,i1:(i1+i2-1)),C1(2,i1:(i1+i2-1)),[0.7 0.7 0.7]);
hold on
idxPatch = idxPatch + 1; % yeah, yeah, dynamically growing hF but too much work to find out how many fields in landmask...
i1 = i2+i1;
end
Now you should've replaced the contour-patches with regular patches where you can controll the colour directly (in my matlab-version there's no obvious color or facecolor property of the h1).
HTH
  댓글 수: 6
Bjorn Gustavsson
Bjorn Gustavsson 2021년 9월 3일
My pleasure.

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