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#797 binary data source uris to support simple math
It would be really nice if the binary data source URIs would support simple math. For example, I need to read a 2-d array from each record, and each is 64x48 floats. I could do the math and put in 3072, but it also serves as documentation, making magic numbers less mysterious. I would just add support for a single operation, either plus or times (+ or * ).
Actually it's pretty easy to support multiple plus and times operations, so I've done that.
I also added a new "dims" control, which allows a rank 3 dataset to be read in from a binary file. For example, dims=[3,2] will read six numbers from each record and reform them into a 3 by 2 array.