Contour Plotting form the text file for x and y coordinates values
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I have a text file whcih contains the data for the x and y coordinates and for each coordinate i have vx,vy, and other quantities. I would like to have spatial plot or contour. I tried using contour f plot but it says Z must be 2*2 matrix whcih i dont understand as Z here is my data of velocity.
Below is how my entires look like.
XC,YC,VX,VY,Omegaz,NP
-51.0,3.0,0.0,0.0,0.0,0.0
-51.0,3.25,0.0,0.0,0.0,0.0
-51.0,3.5,0.0,0.0,0.0,0.0
-51.0,3.75,0.0,0.0,0.0,0.0
-51.0,4.0,0.0,0.0,0.0,0.0
-51.0,4.25,0.0,0.0,0.0,0.0
can you help me with the how to proceed with it. This is what i have bene trying to do.
A1=readtable('Plug.txt','ReadVariableNames',true);
AA1=table2array(A1);
X1=AA1(1:1378,1);
Y1=AA1(1:1378,2);
VY1=AA1(1:1378,4);
contourf(X1,Y1,VY1)
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Chunru
le 22 Août 2022
T = readtable("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1103995/Plug%20-%20Copy.txt")
F = scatteredInterpolant(T.XC, T.YC, T.VY);
[xmin, xmax] = bounds(T.XC);
[ymin, ymax] = bounds(T.YC);
x0 = linspace(xmin, xmax, 50);
y0 = linspace(ymin, ymax, 50);
[xq, yq] = meshgrid(x0, y0);
zq = F(xq, yq);
contourf(x0, y0, zq)
2 commentaires
Chunru
le 22 Août 2022
Specifies the levels:
contourf(x0, y0, zq, levels) % where levels is the chosen levels
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