title: Plot multiple curves in R
body: <p>A have 2 datasets</p>
  
  <pre><code>Summer 1 :
  
  Time  Temerature
  1          12,5
  500        13,5
  1000       15    
  1500       16
  2000        19
  2500       20
  3000       21
  
  summer 2
  
  Time  Temperature
  1          12,5
  500        13,5
  1000       15    
  1500       16
  2000        19
  2500       20
  3000       21
  3500       23
  4000       34
  </code></pre>
  
  <p>I want to plot the 2 temperature curves  (summer 1 and summer 2) according to the time in R. The problem here concerns the axis for the 2 datasets which are not the same : summer 1 (from 1 to 3000) and summer 2 (from 1 to 4000). Can you help me please?</p>