title: ggplot with two Y axes
body: <pre><code>dataframe:-  df
  
    Period        v1      v2
  1   2002        1       1
  2   2003        5       12
  3   2004        9       28
  4   2005        16      66
  5   2006        23      115
  
  Code:-
  
  ggplot() + geom_line(data=df, aes(x=Period, y=v1, group=1, color="v1")) + 
  geom_line(data=df, aes(x=Period, y=v2, group=1, color="v2"))+ theme(legend.title=element_blank()) + scale_y_continuous(name="Count") +
  geom_point(data=df, aes(x=Period, y=v1, group=1)) + geom_point(data=df, aes(x=Period, y=v2, group=1))
  </code></pre>
  
  <p>I am plotting two line graph along with points.The issue I am experiencing is that the values increase in different magnitude and so one of the line graphs <strong>"v1"</strong> gets condensed at the lower end of the scale and thus harder to read. can anyone please advice in solving this? Also can this code be shortened? </p>