Change rows to columns and columns to rows, similar to transpose.
Result should be
(hint: use permute)
Extract leading non-zero digit
2 b | ~ 2 b
Back to basics 15 - Benchmark
Determine Whether an array is empty
Extract a specific part of matrix!
Make roundn function
Weighted moving average
Change string to number
Calculate inverse matrix in m by n matrix
Solve the system of linear equations
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