Question

I have a large matrix mdat (1000 rows and 16 columns) contains first column as x variable and other columns as y variables. What I want to do is to make scatter plot in R having 15 figures on the same window. For example:

mdat <- matrix(c(1:50), nrow = 10, ncol=5)

In the above matrix, I have 10 rows and 5 columns. Is it possible that to use the first column as variable on x axes and other columns as variable on y axes, so that I have four different scatterplots on the same window? Keep in mind that I will not prefer par(mfrow=, because in that case I have to run each graph and then produce them on same window. What I need is a package so that I will give it just data and x, y varaibeles, and have graphs on same windows.
Is there some package available that can do this? I cannot find one.

Answer 1

@user4299 You can re-write shujaa’s ggplot command in this form, using qplot which means ‘quick plot’ which is easier when starting out. Then instead of faceting, use variable to drive the color. So first command produces the same output as shujaa’s answer, then the second command gives you all the lines on one plot with different colors and a legend.

qplot(data = molten, x = V1, y = value, facets = . ~ variable, geom = "point")
qplot(data = molten, x = V1, y = value, color = variable, geom = "point")