How can I plot 2D surface plot with color bar
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Ambali Odebowale
le 12 Déc 2022
Commenté : Star Strider
le 12 Déc 2022
I have an excel file containing 3 variables as attached. I want to plot the variables as a 2D surface plot with the third column representing the color bar. I also attach an example of the plot I am trying to plot.
When I used surf command, I get this error:
Error using surf (line 71)
Z must be a matrix, not a scalar or vector.
Error in PTC_calculation (line 74)
surf(w_ev,beta,PTC)
Thanks
1 commentaire
KSSV
le 12 Déc 2022
You cannot plot a surface plot with the data you have.
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1227857/DATA.xlsx') ;
x = T.w ;
y = T.beta ;
z = T.PTC ;
scatter(x,y,[],z)
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Star Strider
le 12 Déc 2022
Modifié(e) : Star Strider
le 12 Déc 2022
It is possible to create a surface plot from it, however it is probably not worth the effort —
T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1227857/DATA.xlsx')
figure
stem3(T1{:,1}, T1{:,2}, T1{:,3})
xlabel('w')
ylabel('\beta')
view(60,30)
title('Original Data')
N = size(T1,1)*10;
wv = linspace(min(T1.w), max(T1.w), N);
betav = linspace(min(T1.beta), max(T1.beta), N);
PTCv = linspace(min(T1.PTC), max(T1.PTC), N);
[Wm,Bm] = ndgrid(wv, betav);
PTCm = griddata(T1.w, T1.beta, T1.PTC, Wm, Bm);
PTCm(isnan(PTCm)) = 0;
figure
surf(Wm, Bm, PTCm, 'EdgeColor','interp', 'FaceAlpha',0.5)
colormap(turbo)
colorbar
xlabel('w')
ylabel('\beta')
view(60,30)
title('Interpolated Surface Plot Of Original Data')
figure
surf(Wm, Bm, PTCm, 'EdgeColor','interp', 'FaceAlpha',0.5)
colormap(turbo)
colorbar
xlabel('w')
ylabel('\beta')
view(-15,45)
title('Interpolated Surface Plot Of Original Data')
EDIT — Corrected typograp[hical errors.
.
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