How to plot a temperature colored map

Question

Gab D 2019-4-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/455957-how-to-plot-a-temperature-colored-map

回答： sheshu kumar 2019-10-22

Hi everybody,

I have a matrix A=[x,y,temperature] with a lot of rows in each column. I would like to have a continuous colormap (preferably with the equipotential) of the temperature assign to each points. I am able to have the scatter with color, but it's difficult to see the evolution in space (see picture below). I have tried with surf, with contourf, but nothing seems to work (at least when I try with the other example I saw).

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Gab D 2019-4-12

在 MATLAB Online 中打开

A.mat

Hi,

I don't have much to show in terms of attempt, because nothing would give me something close to what I expected. I putted the variable I use in attachment file.

figure(1)
contourf(A)
surf(A)

darova 2019-4-12

Look for griddata()

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Answer 1

KSSV 2019-4-12

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/455957-how-to-plot-a-temperature-colored-map#answer_370355

在 MATLAB Online 中打开

load('A.mat')
x = A(:,1) ; 
y = A(:,2) ; 
z = A(:,3) ; 
nx = length(unique(x)) ; 
ny = length(unique(y)) ; 
X = reshape(x,nx,ny) ; 
Y = reshape(y,nx,ny) ; 
Z = reshape(z,nx,ny) ; 
pcolor(X,Y,Z) ;