Split data based on column values and create scatter plot.

Question

I need to make a scatter plot for days vs age for the f group (sex=1) and make another scatter plot for days vs age for the m group (sex=2) using R

Answer 1

spread splits data by column values. This is also called converting data from "long" to "wide".

I haven't tested this, but something like

spread(data, sex, age) 

should get you

days  1    2
 306  74   NA
 455  NA   67   
1000  55   NA
 505  65   NA
 399  NA   54   
 495  NA   66