Sets resource values for a specified plot object.
ier = Ngl.set_values(plotid, res)
An instance of the Resources class having PyNGL resources as attributes containing the resources you want to set.
This function sets resource values for a plot object independently from a call to a plotting function. This allows for setting values for resources after a plotting function has been called. For example, if you are creating many plots that differ only in the setting of a given resource, then you can loop over the plots while changing only the appropriate resource.