Implement extract_function for transpose matrix

[blegat]

BenchmarkTools.Trial: 5550 samples with 1 evaluation per sample.
 Range (min … max):  844.629 μs …   6.681 ms  ┊ GC (min … max): 0.00% … 84.35%
 Time  (median):     872.664 μs               ┊ GC (median):    0.00%
 Time  (mean ± σ):   899.857 μs ± 170.774 μs  ┊ GC (mean ± σ):  1.34% ±  5.28%

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  845 μs           Histogram: frequency by time         1.03 ms <

 Memory estimate: 393.92 KiB, allocs estimate: 17.

With transpose:

BenchmarkTools.Trial: 10000 samples with 1 evaluation per sample.
 Range (min … max):  22.285 μs …   5.641 ms  ┊ GC (min … max):  0.00% … 99.26%
 Time  (median):     26.119 μs               ┊ GC (median):     0.00%
 Time  (mean ± σ):   44.105 μs ± 122.671 μs  ┊ GC (mean ± σ):  13.06% ±  5.26%

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  █████████████▇▆▅▄▄▅▅▅▃▄▁▃▁▁▃▁▃▃▁▁▁▁▁▃▃▁▃▁▁▄▁▁▃▁▁▁▁▄▆███████▇ █
  22.3 μs       Histogram: log(frequency) by time       142 μs <

 Memory estimate: 393.92 KiB, allocs estimate: 17.