#648 Method to determine total number of elements in a dataset

[Ivar Christopher]

There are QDataSet methods for determining the length of each dimension (length(), with varying arguments). It would be helpful to have a method that returns the total number of elements in a dataset, regardless of the number or length of the dimensions (or whether or not it is a Qube).

Or is there a standard python/jython function that can reliable serve this function?

[Jeremy Faden]

Sorry I missed this, Ivar. If the data is a QUBE (data from almost any source is), then it's easier, but here is code for either case:

# print the total number of elements of a QUBE dataset, where each record has the same form:
ds= zeros(20,30,40)
from org.das2.qds import DataSetUtil
print DataSetUtil.product( DataSetUtil.qubeDims(ds) ) 

# print the total number of elements of a non-QUBE, where each record might be different:
count=0
for d in ds:
    count= count + DataSetUtil.product( DataSetUtil.qubeDims(d) ) 
print count