Plotting problem & Does the matlab can plot raster map?
显示 更早的评论
I have coordinates (X,Y) and its corresponding value (Z), How to visualize them and distinguish with different color for each point? Just like a raster file that every pixel has a value in it.
Thank you very much!
2 个评论
ZC Song
2019-6-4
采纳的回答
Let X,Y,Z be your m*3 data.
x = unique(X) ; nx = length(x) ;
y = unique(X) ; ny = length(y) ;
X = reshape(X,nx,ny) ;
Y = reshape(Y,nx,ny) ;
Z = reshape(Z,nx,ny) ;
figure
pcolor(X,Y,Z)
shading interp
figure
surf(X,Y,Z)
shading interp
9 个评论
ZC Song
2019-6-4
Thank you very much for your reply!
It seems there is some error:
Now I attached the data file named "ans" which contains X,Y,Z data.
ZC Song
2019-6-4
KSSV
2019-6-4
Huumh...attach your data. Or else try this:
m = 500 ; n = 500 ;
x = linspace(min(X),max(X),m) ;
y = linspace(min(Y),max(Y),n) ;
[XX,YY] = meshgrid(x,y) ;
ZZ = griddata(X,Y,Z,XX,YY) ;
pcolor(XX,YY,ZZ)
shading interp
KSSV
2019-6-4
To display use:
scatter(X,Y,100,Z,'s','filled')
ZC Song
2019-6-4
ZC Song
2019-6-4
Thanks for your help I think I'm close to the goal! One question is how to only display one color? like yellow?
Next step would be superpose this map to the .raster map or a .tiff map
KSSV
2019-6-4
YOu have only two values in Z 0 and 1. You can plot them like below:
scatter(X(Z==1),Y(Z==1),'s','filled','r')
hold on
scatter(X(Z==0),Y(Z==0),'s','filled','b')
ZC Song
2019-6-4
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息
Translated by 
