IDL again

today I had to take an array(matrix) of data from Chris and put it through IDL program and subtract certain parts. It actually turned out much more confusing than I thought it would be and I asked someone else for help. After he showed me how to do it, i had to rearrange all the data because it did not show up as two columns. At the end of the day I was given more data, but when I tried to put it through IDL, it stopped so that was frustrating. Tomorrow I will try and figure out what to do with IDL and how to fix it.