- I have a dataset. Columns represents different variables.
- A variable may start with NaN or any double type number.
- If it starts with double number it continues with double type numbers.
- If it starts with NaN, we do not know when it ends.
- Return the row index where last NaN is observed in overall dataset. (Think column-wise)
Input
[ 1 NaN 5 NaN 2
2 NaN 4 4 8
6 NaN 8 2 4
0 0 0 0 0]
should return 3 because last NaN is observed in third row.
Test suite may be changed!
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there seem to be some problems with the testsuite, in particular some of those matrices contain different number of elements per row (e.g. perhaps "5,7" should be "5.7"). I guess the same applies to your example dataset where the last row contains only four numbers instead of five?
I have fixed test suite.
The example from the problem description isn't a valid matrix; the last row has 4 entries rather than 5.