Howdy folks, I am very new to OpenDX, as you will soon find out, and I am having some issues with plotting vector magnitude. I have a data set with u and v wind components which are grouped into a 2-vector variable. When I compute the magnitude of the vector (using compute mag(a)) and display an isosurface of the surfaces are propogating in the opposite direction of the wind flow which to me was a little unexpected. In the fortran script I used to generate the data I calculated the magnitude:
mag=sqrt((u*u)+(v*v)) and stored that in a seperate data set. When I plot the same isosurface there, they move in the same direction as the wind. I also created a dataset with u and v components as individual scalar variables. When I plot either of them the isosurfaces are moving in the same direction as the wind vectors. Am I misinterpreting the way OpenDX calculates vector magnitude or am I doing something else foolish? If any more info (.general file or the data files) is needed please let me know. Thanks in advance. Regards, Matt
