Hi Khalid,

it depends on which format of data you have. The most straightforward is Tecplot format (.dat). In this way you have written VARIABLES = "x" "y" "t" in the first row followed by the n x 3 matrix (each row for each data point x, y, and t). In Tecplot, go to File -> Load Data File and choose Tecplot Data Loader and load the file. After loaded data, set 2D Cartesian Initial Plot and then go to Data -> Triangulate. Set the zone and click on "Compute". Finally, check the box for Contour at the left-hand menu.