Scatter plot without blank values [Excel]?

I am trying to create a scatter plot with the y values stored in the y1,y2,y3 columns. The objective is to obtain a ...

How to overlay scatterplots in R??

If I have three sets of data : a1= rnorm(10) a2= rnorm(10) a3= rnorm(10) rather than looking at these side by sid...