title: Statistical significance of a nls model in R
body: <p>I have some multiple linear models without intercept like below:</p>
  
  <pre><code>Y = a*X1 + b*X2 + c*X3
  </code></pre>
  
  <p>However this model is a linear model, but since it does not have an intercept we have to write it as a non-linear model in R:</p>
  
  <pre><code>model1= nls(Y ~ a*X1+b*X2, data = trainDat, start = list(a = 1, b=1))
  </code></pre>
  
  <p>The problem is that the <code>summary(model1)</code> does not give us the statistics of the model like F-statistics because it is not <code>lm</code>.
  How can we report the significance of these models in R?</p>