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After delving deep I discovered that the data the OP used was probably not the same as the data he posted. Some of the files were not in the correct format (it had multiple spaces between the x and y coordinates). I have solved the problem.

Hello.

I am trying to include plots of airfoils in my report and have tried using this method:
http://www.texample.net/tikz/examples/airfoil-profiles/

When I try it I get a bunch of errors and have no success. I am completely new to latex and really do not know how to correct this. The way the ...