GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
gap> START_TEST("HAP library"); gap> Read(Concatenation(dir,"data246.txt")); gap> F:=ThickeningFiltration(T,20); gap> P1:=PersistentBettiNumbers(F,1);; gap> BarCodeCompactDisplay(P1); gap> P2:=PersistentBettiNumbers(F,1);; gap> BarCodeCompactDisplay(P2); gap> STOP_TEST( "tst.tst", 1000 );