フィルターのクリア

Surf coloring question: How CData works?

5 ビュー (過去 30 日間)
Csaba
Csaba 2019 年 2 月 17 日
コメント済み: Csaba 2019 年 2 月 17 日
I am trying to color different surf pictures. Surf by default colors the surface using the colorbar from minimum of z data up to maximum of z data, using the whole colorbar. I want this to override; color the z data according to the z scale. I have a demo program how I tried to do this:
figure(1);
x=1:50;
y=1:50;
z=rand(50,50);
hs=surf(x,y,z,...
'FaceColor','interp',...
'EdgeColor','none',...
'FaceLighting','gouraud');
abc=max(abs(zlim));
zlim([-abc,abc]);
colorbar;
mmin=min(min(z));
mmax=max(max(z));
hs.CData=(z-mmin)*(2*abc)/(mmax-mmin)-abc ;
view([1 0 0]);
If I run this program, I have a toolbar, saying that deep blue corresponds to -1, bright yellow corresponds to +1 (that is ok, that is what I wanted). The picture, however, is blue around the minimum value (around zero) and yellow at around +1. I would like to have "green" at zero, as it is on the colorbar.
What I am doing wrong???

採用された回答

Rik
Rik 2019 年 2 月 17 日
編集済み: Rik 2019 年 2 月 17 日
This is where the caxis function is for. You can change the color axis to match your data to a desired part of your color bar.
figure(1);
x=1:50;
y=1:50;
z=rand(50,50);
hs=surf(x,y,z,...
'FaceColor','interp',...
'EdgeColor','none',...
'FaceLighting','gouraud');
abc=max(abs(zlim));
zlim([-abc,abc]);
colorbar;
view([1 0 0]);
caxis([-1 1])
  1 件のコメント
Csaba
Csaba 2019 年 2 月 17 日
Thanks, however,
caxis([-abc,abc]);
is the correct in my case.
So many commands!
I still do not understand why my method does not work?????

サインインしてコメントする。

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeOrange についてさらに検索

製品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by