How do I get specific points to show up on plot?

`First I plot the data given on a graph (xy) `Every 8hrs (runs in a while loop doing a calculation) I need the graph to plot the point on the graph with a different color.`

Answer 1

[KSSV]

figure
hold on
for i = 1:10 
    x = rand ; y = rand ;
    plot(x,y,'.','markersize',50,'color',rand(1,3)) ;
end

[hi hey]

why are you settin I=10 and x and y = rand? Could you explain what's going on

[KSSV]

I have taken plots of 10 random points with a loop. I want to demonstrate how to put different colors.