Appending point to 2D plot

[IasonManolas]

I want to iteratively add points to a 2d plot similar to this post.
Can I do this with matplotplusplus?

[alandefreitas]

If you want to iteratively add points to a plot, have a look at this: https://alandefreitas.github.io/matplotplusplus/examples/appearance/multiplot/hold.html

If you want to iteratively change the points in a plot, just put the commands in a loop without hold.

[IasonManolas]

Isn't hold in these examples used to add lines and not points to the same plot?
I expected something along the lines of:
plotHandle->addPoint(p_x,p_y);

[alandefreitas]

"Hold" means the next plot (be it points, lines, histograms, bar plots, contour lines, whatever) will not replace the previous plot.