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ref: work-0 tags: distilling free-form natural laws from experimental data Schmidt Cornell automatic programming genetic algorithms date: 09-14-2018 01:34 gmt revision:5 [4] [3] [2] [1] [0] [head]

Distilling free-form natural laws from experimental data

  • There critical step was to use partial derivatives to evaluate the search for invariants. Even yet, with a 4D data set the search for natural laws took ~ 30 hours.
    • Then again, how long did it take humans to figure out these invariants? (Went about it in a decidedly different way..)
    • Further, how long did it take for biology to discover similar invariants?
      • They claim elsewhere that the same algorithm has been applied to biological data - a metabolic pathway - with some success.
      • Of course evolution had to explore a much larger space - proteins and reculatory pathways, not simpler mathematical expressions / linkages.

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ref: -0 tags: perl shuffle lines from sdtdin date: 10-31-2010 13:57 gmt revision:0 [head]

Shuffle lines read in from stdin. I keep this script in /usr/local/bin on my systems, mostly for doing things like ls | shuffle > pls.txt && mplayer -playlist pls.txt

#!/usr/bin/perl -w
use List::Util 'shuffle';

while (<STDIN>) {
    push(@lines, $_);
@reordered = shuffle(@lines);
foreach (@reordered) {
    print $_;