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Rich-
> We often initialize the sea floor with a certain thickness of sediment
> and then want to see how the bed changes with time. To see this
> clearly it would be nice to create a formula that subtracts the
> initial value of the sediment thickness (at time step =1) from every
> other time step of sediment thickness, so that the initial change
> field would show all zeros, and then we would see the changes with
> time.
>
> Is this possible?
Anything's possible. ;-) If you don't want to wait for Jeff, you could
try something in Jython like:
def diffFromStart(data):
newData = data.clone()
first = data[0]
for t in range(data.length):
newData[t] = data[t]-first
return newData
I tried this on one grid and it worked. ;-) You may have to tweak it some. It
assumes that this is a time sequence.
> The bundle I'd like to do this with is at:
> http://coast-enviro.er.usgs.gov/models/share/bed_thick_coast2_2.xidv
Don
Ticket Details
===================
Ticket ID: ZMQ-488883
Department: Support IDV
Priority: Normal
Status: Open