Here is "DATAPACKING=BLOCK" format of the above mesh. If we change "DATAPACKING=POINT" to "DATAPACKING=BLOCK", then tecplot expects all the x coordinates, then all the y coordinates and finally all the z-coordinates. The first line contains the x,y, and z coordinates of the first point and so on. That is we read the data points (suppose they are stored in the array A) as follows i=1, i=2, i=3, i=4, i=5. Note that the i index corresponds to the inner loop (the fast loop). The line "zone i=5, j=4, DATAPACKING=POINT" states that we have 20 points in our mesh, the mesh is 5 x 4. Here is a mesh and the simple data file that produced it. You may use either upper or lower case letters. See the manual if you are interested in the shortcuts. Spaces and blank lines are ignored by Tecplot and there are some short cuts that will eliminate a line or two from the header.
You may use your favorite editor to add the headers to your data. Structured Data Structured data may be either 1, 2 or 3 dimensional. Your progams should call FORTRAN or C functions supplied by Tecplot to write the data. Tecplot can read binary files that have been created by "preplot" or created by your programs. These are ascii files that tecplot converts to binary using a program called "preplot". Tecplot Data Formats Tecplot can read in several data formats, including structured, unstructured or one dimensional(for Graphs).
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