Specify x increments for vertcross function

[andreas-h]

It seems to me that currently the vertcross function's return value includes one x point for every WRF grid cell crossed by the line.

For some applications (i.e., integrate concentrations along the x axis) it would be very useful if one could not only specify levels to prescribe the points in z direction, but also specify the number of sampling points along the cross-section which vertcross result should contain.

Would you be interested in including this functionality in wrf-python, or should I rather do this as a post-processing step on my own?

[bladwig1]

This would probably be useful in wrf-python and NCL, but I'm not sure when I'll be able to get to it.