title: How do I plot multiple columns on the X-axis in R?
body: <p>I start with a set of 100 genes that are most often found in a certain biological substance, this list is called "top100". Using MERGE I manage to get the counts for each of this 100 proteins out of this dataset for each of the samples. I want to plot the counts for each individual protein, per sample. </p>
  
  <p>So basically I want a plot that shows for instance: protein: PKM and than plots for each of the samples (N=2 in this case) the counts, than I want to repeat this process for all 100 proteins in individual plots.</p>
  
  <pre><code>            row.names   Gene.Symbol     Normalised.count.(B)        Normalised.count.(A)
      1           1           A2M             46.073855                   280.736354
      2           5           ACTN4           0.000000                    10.436296
      3           8           ALDOA           39.354751                   61.574145
      4           9           ANXA1           1.919744                    1.043630
      5           13          ANXA5           8.638848                    0.000000
      6           17          BSG             5.759232                    1.043630
      7           22          CD81            1.919744                    2.087259
      8           23          CD9             2.879616                    4.174518
      9           25          CFL1            5.759232                    10.436296
      10          26          CLIC1           1.919744                    10.436296
  </code></pre>
  
  <p>This is 1/10 of the total list, so for each gene symbol I want both noramlised count values plotted where </p>
  
  <p>X1 = gene symbol y= normalised.count.(A) </p>
  
  <p>X2= gene symbol y= normalised.count.(B)</p>
  
  <p>This is what I got so far to sort to the final list. </p>
  
  <pre><code> library("openxlsx") 
   library("dplyr")
   library("ggplot2")
   library('reshape2')
   library('gdata')
  
   protein_report &lt;- read.xlsx(file.choose(), sheet=1)
   top100 &lt;- read.xlsx(file.choose(), sheet=1)
  
   norm &lt;- matchcols(protein_report,with = "Norm")
   top &lt;- na.omit(merge(top100, protein_report[c("Gene.names",norm)], by.x="Gene.Symbol",by.y="Gene.names", all.x = T, all.y = F))     
  </code></pre>
  
  <p>How to plot these values? </p>