Grabbing points from scatter plot

2020 6 18
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更新时间：2020 6 19
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I have 2 matrices and i plotted them on a scatter plot and i would like to highlight some points from the plot and discard all the other data points from the matrices i generated the scatter plot from. Is this possible.
e.g my plot is made out of 1000 data points and i would like to select 25 points from the plot and discard all the other data points from the matrices with the data.
Really Sorry if this is not possible or not clear

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Ameer Hamza
Ameer Hamza 2020-6-19

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This shows how you can randomly select points from the complete dataset
x = rand(1000, 1);
y = rand(1000, 1);
idx = randperm(1000, 25); % randomly select 25 points
scatter(x(idx), y(idx))

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