What causes the Surfer gridding error:"Insufficient data (collinear)"? Is it because all my Y values are 0?

One of the new features of Surfer 15 is the ability to grid collinear data!  If you are receiving this message using Surfer 15 or a newer version, try using one of the following gridding methods:
  • Inverse Distance
  • Nearest Neighbor
  • Moving Average
  • Data Metrics
Surfer 14 and older versions can not grid data if all of the points are collinear (all in a straight line). 


To work around this in older versions, either add more data points not in the line, or change one of the values by a small amount (e.g. 0.001), save the changes, and grid the data.


Updated October 30, 2018

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