title: interpolating a data along y axis at points defined along x axis
body: <p>Due to lack of explaining i am going to edit my question a bit. 
  I have a data set along y axis plotted against x axis with step of 0.01 along x axis. Of course along y axis the step can be any arbitrary value. For example i have 0.02 and 0.03 then 0.05. Which means value 0.04 is  missing along y axis. I want to interpolate this and values like this. </p>
  
  <p>Please help me out.</p>
  
  <p>Data: (Its just part of data, Actuall data goes till 1 in both columns)</p>
  
  <pre><code>0 0.154994
  0.01 0.161559
  0.02 0.16794
  0.03 0.168151
  0.04 0.172584
  0.05 0.177927
  0.06 0.187229
  0.07 0.194835
  0.08 0.195799
  0.09 0.200876
  0.1 0.207076
  0.11 0.213972
  0.12 0.220275
  0.13 0.227207
  0.14 0.234465
  0.15 0.238785
  0.16 0.250232
  0.17 0.257551
  </code></pre>