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                | mskrifva | 
                Posted - 11/04/2005 : 5:26:30 PM   Origin Version (Select Help-->About Origin): 7.5  Operating System: Windows 2000 
  I have a problem with adding a reference line to a set of data and calculating the area of a curve under it. 
  Imagige a study were 8 blood pressure values (72, 68, 64, 66, 76, 79, 76, 73) are measured every 10 minutes. I would then like to draw a graph of this over time and then ad a reference line with the blood pressure value 70. Then I would like to count the area under and over the graph and the reference line. 
  I would be very glad for some help. 
  Kind regards, 
  Markus, Helsinki, Finland
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