MATLAB: How to plot a temperature colored map

MATLABtemperature map

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).

Best Answer

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) ;

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MATLAB: Contour plot for given x,y,z


[num,txt,raw] = xlsread('Book1.xlsx') ; 
x = num(:,1) ; 
y = num(:,2) ; 
z = num(:,3) ; 
figure(1)
scatter(x,y,20,z,'filled') ; colorbar
%% Method 1 / Griddata
nx = 500 ; ny = 500 ;
[X,Y] = meshgrid(linspace(min(x),max(x),nx),linspace(min(y),max(y),ny)) ;
Z =griddata(x,y,z,X,Y) ;
figure(2)
contour(X,Y,Z) ;
figure(3)
pcolor(X,Y,Z)
shading interp 
%% Method 2 simple reshaping 
x = unique(x) ; nx = length(x) ;
y = unique(y) ; ny = length(y) ;
Z = reshape(z,ny,nx) ;
figure(4)
contour(x,y,Z)

MATLAB: I want to plot a 3d image of the set of values attached herewith. i am also enclosing the possible image that will be the output of the desired Matlab code.

data = xlsread('Book1.xlsx') ; 
x = data(:,1) ; 
y = data(:,2) ; 
z = data(:,3) ; 
nx = length(unique(x)) ; 
ny = length(unique(y)) ; 
X = reshape(x,nx,ny) ; 
Y = reshape(y,nx,ny) ; 
Z = reshape(z,nx,ny) ; 
surf(X,Y,Z)
shading interp 
colorbar

Best Answer

Related Solutions

MATLAB: Contour plot for given x,y,z

MATLAB: I want to plot a 3d image of the set of values attached herewith. i am also enclosing the possible image that will be the output of the desired Matlab code.

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