Hi Ghansham,This question was asked in another unrelated thread. It's always best to start new threads for each new topic. I thought I'd split it off into a new topic.
On 2/24/2014 5:40 PM, Ghansham Sangar wrote:
hi sir thanks a lot for informative mail. regarding substitution stuff, i gave a count variable like this TIR[timedim][dimx][dimy] where timedim is 1 in size.the data range of this variable is 0 to 1023. I have another variable TIR_TEMP which is 1 dimensional of size 1024. I want to use TIR dara values to index into TIR_TEMP values to create a TIR_TEMP 3d variableghansham
I still don't know if I understand what you mean about indexing into another variable. Here are a couple of possibly related topics that may get you started.
1) You can define an axis from the data in a variable. If TIR_TEMP represents time in known units since some date, then this would looks like
yes? define axis/t/t0="time string"/units="time units" tax = TIR_TEMPThen, if the time coordinate variable of your TIR[timedim][dimx][dimy] has the same time origin and units as the axis "tax", you can
yes? let tir_on_tax = tir[gt=tax]and the variable will be defined on axis "tax", with data only at that time step. This is a regridding operation, so you could choose any of the different regridding transformations.
2) Look up "conformability" in the Users Guide Index. This is about working with variables on different-dimensioned grids and combining them in an expression.
3) Have a look at the topic "timestamp". Do you want to start with a set of snapshots in XY, give each one a time stamp so that each becomes a timestep on a common T axis, and then assemble them into an XYT dataset?
-Ansley