title: How to plot a Radar chart in ggplot2 or R
body: <p>I am trying to make a Radar plot as in attached <a href="https://dl.dropboxusercontent.com/u/6258283/Radarchart.jpg" rel="nofollow noreferrer">image</a> using and ggplot2 ( or any other package in R).<a href="https://stackoverflow.com/questions/9614433/creating-radar-chart-a-k-a-star-plot-spider-plot-using-ggplot2-in-r">This</a> talk about this but my case is different as i am trying to create a spider plot for response data with certain range.
  I made a plot using a code as below, but i couldn't figure out howto make this like in the image. Kindly help me with this.</p>
  
  <pre><code>Impcts &lt;- c("system","supply","security","well-being")
  present &lt;- c(5,5,3,5)
  past &lt;- c(6,6,4,5)
  group.names &lt;- c("present", "past")
  ddf.pre &lt;- data.frame(matrix(c(rep(group.names[1], 4), Impcts), nrow = 4,      ncol = 2), var.order = seq(1:4), value = present)
  ddf.pas &lt;- data.frame(matrix(c(rep(group.names[2], 4), Impcts), nrow = 4, ncol = 2), var.order = seq(1:4), value = past)
   ddf &lt;- rbind(ddf.pre, ddf.pas)
   colnames(ddf) &lt;- c("Group", "Impcts", "var.order", "var.value")
   library(ggplot2)
   ggplot(ddf, aes(y = var.value, x = reorder(Impcts, var.order),
   group =   Group, colour = Group))+
   coord_polar() + 
   geom_path() +
   geom_point()+
   labs(title = "Impacts Analysis").
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/nlUse.jpg" alt="enter image description here"></p>