title: fitting semivariogram using R
body: <p>I've fitted my semivariogram using "geoR" package as follows:</p>
  
  <pre><code>#loading geoR
  library(geoR)
  #calculating the semivariogram
  bin1 &lt;- variog(geodata)
  #plotting
  plot(bin1)
  #fitting the model
  lines.variomodel(cov.model = "exp", cov.pars = c(0.571,0.2527), nug = 0.13, max.dist=1)
  </code></pre>
  
  <p>Is there any way to know the goodness-of-fit of the exponential model (with ease)??</p>
  
  <p>Thanks in advance ...</p>