How to plot a pcolor from 3 vectors?
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I have 3 vectors that I imported from a text file in a three column format that I cannot change. The columns are latitude, longitude and temperature. I want to plot a 2D map with the temperature as a colorbar. Normally I use:
pcolor(lat,lon,temp), shading 'flat';%pcolor/mesh/surf(X,Y,Z)
But this only works when there is a value for every value of lat and lon; Z is a matrix. The values for lat and lon from my new source are scattered and at random intervals. Any suggestions, please?
Cheers,
Alex
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KSSV
2017 年 4 月 26 日
doc griddata
N = 1000 ;
x = 2*rand(N,1) - 1;
y = 2*rand(N,1) - 1;
z = 2*rand(N,1) - 1;
v = x.^2 + y.^3 - z.^4;
%
d = -1:0.05:1;
[xq,yq,zq] = meshgrid(d,d,0);
% Interpolate the scattered data on the grid. Plot the results.
vq = griddata(x,y,z,v,xq,yq,zq);
plot3(x,y,v,'ro')
hold on
surf(xq,yq,vq)
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