Hi folks,

I have only started to play around with SystemML. The documentation here 
(http://apache.github.io/incubator-systemml/beginners-guide-to-dml-and-pydml.html#creating-a-matrix)
 says that matrices are supposed to index from 1 in both DML and PyDML. 
However, the example code throws an error, clearly indicating out-of-bounds 
indices.

at 
org.apache.sysml.runtime.controlprogram.ForProgramBlock.execute(ForProgramBlock.java:186)
... 5 more
Caused by: org.apache.sysml.runtime.DMLRuntimeException: Invalid values for 
matrix indexing: [2:2,4:4] must be within matrix dimensions [4,3]
at 
org.apache.sysml.runtime.matrix.data.MatrixBlock.sliceOperations(MatrixBlock.java:4033)
...

The PyDML language reference .doc on the other hand says indexing is 0-based in 
PyDML.

I was going to submit a PR to correct the Beginner's Guide, but I wanted to 
first check what the intent was.

Thanks for your help!


<http://apache.github.io/incubator-systemml/beginners-guide-to-dml-and-pydml.html#creating-a-matrix>
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