MATLAB: Plot only some points of a vector

plotvector

Hi everyone,

I have a row vector of length N, I want to plot only few points of the vector, eg I plot the first point of the vector and then I jump 3 points of the vector and I plot the 5th and so on, keeping a regular step of 3 for instance. Please could someone help me to do that on Matlab?

Best Answer

   plot(yourVector(1:3:end))

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MATLAB: Marking some points.

Silpa - you could try something like

A=[0.8570,  1.0447  ,  1.2136  ,  1.3637  ,  1.4670   , 1.4576  ,  1.3731  ,  0.9696  ,  0.6505 ,   0.2845]
B=[1.2136,.2845];
plot(A);
hold on;
plot(cell2mat(arrayfun(@(x)find(abs(A-x)<eps),B, 'UniformOutput',false)), B,'*');

where we use arrayfun to get the indices of the element of B in A (so that they are drawn at the correct coordinates).

Note that the above doesn't handle the case where the elements of B are NOT in A, so you would need to add code to guard against this.

MATLAB: Plot a 3D area on a ellipsoid

Chewed a bit

Best Answer

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MATLAB: Marking some points.

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