How to combine 2 plots ggplot into one plot

Question

By using R  is it possible to place 2 ggplot together  i e   on the same plot   I wish to show a trend from 2 different data frames and instead of putting them one next to the other  I d like to integrate them together in one plot and only to change the color of one of them  the black dot    To be more specific  I have the following 2 visuals   ggplot visual1  aes ISSUE DATE COUNTED     geom point     geom smooth fill  blue   colour  darkblue   size 1    and  ggplot visual2  aes ISSUE DATE COUNTED     geom point     geom smooth fill  red   colour  red   size 1    They look like this  both have black dots and I ll need to change one of them to something different      and

User · Answer

Just combine them  I think this should work but it s untested   p  lt - ggplot visual1  aes ISSUE DATE COUNTED     geom point           geom smooth fill  blue   colour  darkblue   size 1   p  lt - p   geom point data visual2  aes ISSUE DATE COUNTED           geom smooth data visual2  fill  red   colour  red   size 1   print p

User · Answer

Dummy data  you should supply this for us   visual1   data frame ISSUE DATE runif 100 2006 2008  COUNTED runif 100 0 50   visual2   data frame ISSUE DATE runif 100 2006 2008  COUNTED runif 100 0 50     combine   visuals   rbind visual1 visual2  visuals vis c rep  visual1  100  rep  visual2  100     100 points of each flavour   Now do    ggplot visuals  aes ISSUE DATE COUNTED group vis col vis         geom point     geom smooth     and adjust colours etc to taste

User · Answer

Creating a single combined plot with your current data set up would look something like this  p  lt - ggplot             blue plot       geom point data visual1  aes x ISSUE DATE  y COUNTED            geom smooth data visual1  aes x ISSUE DATE  y COUNTED   fill  blue           colour  darkblue   size 1            red plot       geom point data visual2  aes x ISSUE DATE  y COUNTED            geom smooth data visual2  aes x ISSUE DATE  y COUNTED   fill  red           colour  red   size 1    however if you could combine the data sets before plotting then ggplot will automatically give you a legend  and in general the code looks a bit cleaner  visual1 group  lt - 1 visual2 group  lt - 2  visual12  lt - rbind visual1  visual2   p  lt - ggplot visual12  aes x ISSUE DATE  y COUNTED  group group  col group  fill group           geom point           geom smooth size 1

[r] How to combine 2 plots (ggplot) into one plot?

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