how to make heatmap smooth?

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ryunosuke tazawa
ryunosuke tazawa 2021-11-12
评论： ryunosuke tazawa 2021-11-12
I want to make heatmap smooth, but cell edge can not be without.
Please tell me the way .
D1 = rad2deg(-4.71);
D2 = rad2deg(-3.14);
Theta_Theory = linspace(D2, D1, 10000);
Velocity_Theory = linspace(-100,0,10000);
figure(1);
[Theta_Theory, Velocity_Theory] = meshgrid(Theta_Theory, Velocity_Theory);
x1 = sin(Theta_Theory);
y1 = -cos(Theta_Theory);
T = sqrt(2*abs(y1)/9.8);
target = 10;
S_z = x1 + abs(Velocity_Theory.*cos(Theta_Theory)).*T.';
z = -abs(S_z -target);
h = pcolor(Theta_Theory, Velocity_Theory,z);
shading interp
set(h,'EdgeColor','none','linestyle','none');
colorbar;
colormap(jet(256));
  1 个评论
KSSV
KSSV 2021-11-12
As you are considering the angles in degrees, you should use sind and cosd

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KSSV
KSSV 2021-11-12
Ran in:
D1 = -4.71 ;
D2 = -3.14 ;
Theta_Theory = linspace(D2, D1, 1000);
Velocity_Theory = linspace(-100,0,1000);
figure(1);
[Theta_Theory, Velocity_Theory] = meshgrid(Theta_Theory, Velocity_Theory);
x1 = sin(Theta_Theory);
y1 = -cos(Theta_Theory);
T = sqrt(2*abs(y1)/9.8);
target = 10;
S_z = x1 + abs(Velocity_Theory.*cos(Theta_Theory)).*T.';
z = -abs(S_z -target);
h = pcolor(Theta_Theory, Velocity_Theory,z);
shading interp
set(h,'EdgeColor','none','linestyle','none');
colorbar;
colormap(jet(256));
  1 个评论
ryunosuke tazawa
ryunosuke tazawa 2021-11-12
Thanks a lot. if I want to increased number of x and y values , should I do?
The error hapend " low-level graphics"
Theta_Theory = linspace(D2, D1, 1000);
Velocity_Theory = linspace(-100,0,1000);
↓
Theta_Theory = linspace(D2, D1, 10000);
Velocity_Theory = linspace(-100,0,10000);

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