0 个投票

I have an x and y data coordinates of an l shaped plate and z data of corresponding displacements and each matrix is 23 rows.
can anyone help me draw a 2d filled contour plot
x = [0;0.03;0.03;0.01;0.01;0;0.02;0.02;0.01;0;0.01;0.02;0.015;0.005;0.025;0.03;0.025;0.01;0.005;0;0.01;0.005;0]
y = [0;0;0.01;0.01;0.04;0.04;0;0.01;0.025;0.025;0;0.005;0.01;0.005;0;0.005;0.01;0.0175;0.025;0.0125;0.0325;0.04;0.0325]
z = [0.002071017;0.002090221;0.001384402;0.001358957;0;0;0.002078694;0.001373731;0.000432053;0.000422168;0.002069412;0.001727074;0.001369789;0.001713017;0.002084764;0.00173648;0.00137873;0.000855225;0.000414625;0.001187851;0.000125043;0;0.000124721]

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Star Strider
Star Strider 2021-1-8

0 个投票

Try this:
x = [0;0.03;0.03;0.01;0.01;0;0.02;0.02;0.01;0;0.01;0.02;0.015;0.005;0.025;0.03;0.025;0.01;0.005;0;0.01;0.005;0];
y = [0;0;0.01;0.01;0.04;0.04;0;0.01;0.025;0.025;0;0.005;0.01;0.005;0;0.005;0.01;0.0175;0.025;0.0125;0.0325;0.04;0.0325];
z = [0.002071017;0.002090221;0.001384402;0.001358957;0;0;0.002078694;0.001373731;0.000432053;0.000422168;0.002069412;0.001727074;0.001369789;0.001713017;0.002084764;0.00173648;0.00137873;0.000855225;0.000414625;0.001187851;0.000125043;0;0.000124721];
N = 15;
xv = linspace(min(x), max(x), N);
yv = linspace(min(y), max(y), N);
[X,Y] = ndgrid(xv, yv);
Z = griddata(x,y,z,X,Y,'linear');
figure
contourf(X, Y, Z, 'ShowText','on')
xlabel('x')
ylabel('y')
Change ’N’ to get different results.

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the problem is the graph came out like this it went beyond the geometry and my geometry is l shaped
Star Strider
Star Strider 2021-1-8
I went back and plotted your original data to understand what you want.
Add this assignment to limit ‘Z’ appropriately:
Z((X>=0.01) & (Y>=0.01)) = NaN;
so the code is now:
x = [0;0.03;0.03;0.01;0.01;0;0.02;0.02;0.01;0;0.01;0.02;0.015;0.005;0.025;0.03;0.025;0.01;0.005;0;0.01;0.005;0];
y = [0;0;0.01;0.01;0.04;0.04;0;0.01;0.025;0.025;0;0.005;0.01;0.005;0;0.005;0.01;0.0175;0.025;0.0125;0.0325;0.04;0.0325];
z = [0.002071017;0.002090221;0.001384402;0.001358957;0;0;0.002078694;0.001373731;0.000432053;0.000422168;0.002069412;0.001727074;0.001369789;0.001713017;0.002084764;0.00173648;0.00137873;0.000855225;0.000414625;0.001187851;0.000125043;0;0.000124721];
N = 150;
xv = linspace(min(x), max(x), N);
yv = linspace(min(y), max(y), N);
[X,Y] = ndgrid(xv, yv);
Z = griddata(x,y,z,X,Y,'linear');
Z((X>=0.01) & (Y>=0.01)) = NaN;
figure
contourf(X, Y, Z, 'ShowText','on')
xlabel('x')
ylabel('y')
producing this filled contour plot:
See the documentation for contourf to change the number of contours or to define specific contours, among other options.
cheers mate this really helped
Star Strider
Star Strider 2021-1-8
Cheers indeed!
Thank you!

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