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Plotting contour or colored map

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  Plotting contour or colored map Ayurzana badarch <badarchiinayurzana@gmail.com> - 2015-04-03 07:13 -0700

#2866 — Plotting contour or colored map

Hi there.
I am new on using Gnuplot. Currently I am trying to plot velocity contour map of shear driven cavity flow, using x, y coordinate and corresponded point velocity value. I spend lot of time to read previous subjects about creating contour. Eventually I confused every command such as pm3d, dgrid3dData so on. I need advice from experts /from you/ right way to create contour just in my case. Thanks so much. File structure is following (x, y, velocity):
0.17450271E-04  0.17450281E-04  0.35246905E-03
0.25383109E-04  0.41755888E-04  0.32849953E-03
0.27085474E-04  0.65709156E-04  0.35437746E-03
0.28079854E-04  0.89819845E-04  0.34445891E-03
0.28533417E-04  0.11428388E-03  0.34509057E-03
0.28791838E-04  0.13892376E-03  0.34464071E-03
0.28964875E-04  0.16366655E-03  0.34592254E-03
0.29088113E-04  0.18847221E-03  0.34763721E-03
0.29181504E-04  0.21331912E-03  0.34962841E-03
0.29254988E-04  0.23819450E-03  0.35177104E-03
0.29314351E-04  0.26309054E-03  0.35395102E-03
0.29363198E-04  0.28800206E-03  0.35609803E-03
0.29403923E-04  0.31292553E-03  0.35817186E-03
0.29438179E-04  0.33785844E-03  0.36014927E-03
0.29467155E-04  0.36279893E-03  0.36201770E-03
0.29491746E-04  0.38774560E-03  0.36377149E-03
0.29512649E-04  0.41269733E-03  0.36540992E-03
0.29530437E-04  0.43765323E-03  0.36693622E-03
0.29545607E-04  0.46261253E-03  0.36835707E-03
0.29558607E-04  0.48757456E-03  0.36968232E-03
0.29569863E-04  0.51253872E-03  0.37092488E-03
0.29579797E-04  0.53750441E-03  0.37210073E-03
0.29588841E-04  0.56247104E-03  0.37322895E-03
0.29597448E-04  0.58743801E-03  0.37433195E-03
0.29606106E-04  0.61240462E-03  0.37543599E-03
this will be continue ....

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