title: Change direction of axis title and label in 3dplots in R?
body: <p>I have a question that might be easy for a person who is expert in R plot. I need to draw 3D plot in R. My data is as follows:</p>
  
  <pre><code>df &lt;- data.frame(a1 = c(489.4,  505.8,  525.8,  550.2,  576.6),
  a2 = c(197.8,  301,    389.8,  502,    571.2),
  b1 = c(546.8,  552.6,  558.4,  566.4,  575),
  b2 = c(287.2,  305.8,  305.2,  334.4,  348.6), c1 = c(599.6,  611.4,  
  623.6,  658,    657.4), c2 = c(318.8,  423.2,  510.8,  662.4,  656),
  d1 = c(616,    606.8,  600.2,  595.6,  595),
    d2 = c(242.4,  292.8,  329.2,  378,    397.2),
  e1 = c(582.4,  580,    579,    579,    579),
  e2 = c(214,    255.4,  281.8,  303.8,  353.8))
  
  colnames(df) &lt;- rep(c("V1", "V2"), 5)
  df.new &lt;- rbind(df[, c(1, 2)],df[, c(3, 4)],df[, c(5, 6)],               
  df[, c(7, 8)],df[, c(9, 10)])
  df.new$Group &lt;- factor(rep(c("a","b","c","d","e"), each = 5))
  df.new$Class &lt;- rep(c(1:5), 5)
  </code></pre>
  
  <p>I am drawing a 3D Plot using scatterplot3d package. </p>
  
  <pre><code>x=df.new$Class
  y=V1
  z=V2
  scatterplot3d(x,y,z, pch = 16, color=colors,main="3D V1 v.s V2",xlab = 
  "Class",ylab = "V1", zlab = "V2")
  </code></pre>
  
  <p>Now I want to do 2 modifications. One is to make the vertical title of those axis horizontal and the next is to put a label for values of x and for example put a label "first interval" for 1 in x values and so one and so forth. How an I do it? </p>
  
  <p>Also, how can I make the points linear or plane instead of dots.</p>