title: My R plots are not showing any colors and entire plot become hidden,
body: <pre><code>&gt; library(ggplot2)
  &gt; library(gcookbook)
  &gt; cabbage_exp
    Cultivar Date Weight        sd  n         se
  1      c39  d16   3.18 0.9566144 10 0.30250803
  2      c39  d20   2.80 0.2788867 10 0.08819171
  3      c39  d21   2.74 0.9834181 10 0.31098410
  4      c52  d16   2.26 0.4452215 10 0.14079141
  5      c52  d20   3.11 0.7908505 10 0.25008887
  6      c52  d21   1.47 0.2110819 10 0.06674995
  
  
  &gt; b3 = ggplot(cabbage_exp, aes(x = Date, y = Weight, fill = Cultivar))
  &gt; b3 + geom_bar(stat = "identity",position = "dodge")
  &gt; b3 + scale_fill_brewer(palette = "Accent")
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/otJGM.jpg" alt="plot"></p>
  
  <p>Idon't know why colors are not showing inside my plots whenever i enter scale_fill_brewer or scale_fill_manual the plot doesn't show</p>
  
  <p>but when i use only this part of code it shows this figure</p>
  
  <pre><code>&gt; library(ggplot2)
  &gt; library(gcookbook)
  &gt; cabbage_exp
    Cultivar Date Weight        sd  n         se
  1      c39  d16   3.18 0.9566144 10 0.30250803
  2      c39  d20   2.80 0.2788867 10 0.08819171
  3      c39  d21   2.74 0.9834181 10 0.31098410
  4      c52  d16   2.26 0.4452215 10 0.14079141
  5      c52  d20   3.11 0.7908505 10 0.25008887
  6      c52  d21   1.47 0.2110819 10 0.06674995
  &gt; b3 = ggplot(cabbage_exp, aes(x = Date, y = Weight, fill = Cultivar))
  &gt; b3 + geom_bar(stat = "identity",position = "dodge")
  </code></pre>
  
  <p>the oucome is</p>
  
  <p><img src="https://i.stack.imgur.com/4xym0.jpg" alt="plot"></p>