Gibberish

Posts tagged ‘point’

Adding point to Matlab plot

Here is the code to plot a data point to a 2D diagram.

plot(x,y) %plot the line
yi=interp1(x,y,a)
% a is a real number of the
% x-axis value of the data point
hold on
plot(a,yi,'*')

For example:

x=[0:0.01:1];
y=[0:10:1000];
plot(x,y);
% Now add a data point with x=0.25
yi=interp1(x,y,0.25);
hold on;
plot(0.25,yi,'*')

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