text: user2094: I have a basic ggplot2 R question. I have a dataframe in which data looks like this:
  AA 4
  AA 6
  BB 6
  AB 5
  BA 4
  AA 3
  NN 2
  AN 6
  NN 5
  AN 4
  NA 3
  BB 6
  BN 5
  NB 1
  BN 7
  
  The file is of multiple lines. I want to make a histogram using gplot2 that will plot the 9 kinds of variables AA,BB,AB,BA,AN,BN,NN,NB,NA on the x-axis and the sum of it's corresponding values in the next column on the y-axis. 
  So for example, here the y-values should be 
  AA= 13
  BB= 12
  AB= 5
  BA= 4
  NN= 7
  AN= 10
  NA= 3
  BN= 12
  NB= 1
  
  
  user77: This isn't a bioinformatics question, but it's quicker to answer than to close.
  df1 <- read.table(text = "
  AA 4
  AA 6
  BB 6
  AB 5
  BA 4
  AA 3
  NN 2
  AN 6
  NN 5
  AN 4
  NA 3
  BB 6
  BN 5
  NB 1
  BN 7", na.strings = "")
  
  library(ggplot2)
  
  ggplot(df1, aes(x = V1, y = V2)) +
    geom_bar(stat = "identity")
  
  
  
original_text: 2094: <p>I have a basic ggplot2 R question. I have a dataframe in which data looks like this:</p>
  
  <pre><code>AA 4
  AA 6
  BB 6
  AB 5
  BA 4
  AA 3
  NN 2
  AN 6
  NN 5
  AN 4
  NA 3
  BB 6
  BN 5
  NB 1
  BN 7
  </code></pre>
  
  <p>The file is of multiple lines. I want to make a histogram using gplot2 that will plot the 9 kinds of variables AA,BB,AB,BA,AN,BN,NN,NB,NA on the x-axis and the sum of it's corresponding values in the next column on the y-axis. </p>
  
  <p>So for example, here the y-values should be </p>
  
  <pre><code>AA= 13
  BB= 12
  AB= 5
  BA= 4
  NN= 7
  AN= 10
  NA= 3
  BN= 12
  NB= 1
  </code></pre>
   77: <p>This isn't a bioinformatics question, but it's quicker to answer than to close.</p>
  
  <pre><code>df1 &lt;- read.table(text = "
  AA 4
  AA 6
  BB 6
  AB 5
  BA 4
  AA 3
  NN 2
  AN 6
  NN 5
  AN 4
  NA 3
  BB 6
  BN 5
  NB 1
  BN 7", na.strings = "")
  
  library(ggplot2)
  
  ggplot(df1, aes(x = V1, y = V2)) +
    geom_bar(stat = "identity")
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/2srXF.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2srXF.jpg" alt="enter image description here"></a></p>
  