I have data presented in a free format list, where the title begins on the first charater of the line and may be one or two characters, it is then followed by a series of numbers (one number per line, begins in the second column) that I need to read in as an array, before the next block begins. It isn't strictly delimited. The following is example input: 
C
 -2.3242E-003
 1.32423
 0.34243E+002

..etc...

 -3.23134
H
 more numbers

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I need to get it as an array of arrays, i.e. 
C -2.3242E-003 1.32423 0.34243E+002 ... -3.23134
H numbers

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I don't necessarily know the length of the array and they aren't necessarily the same. I've been trying to test on the first character of the line, but it seems to produce garbage. Any help appreciated. 
my $i=0;

while <$input>{
if (/^[A-Z]){
   $AA[$i][0] = $_;
   my $j=1;
   }
else{
   $AA[$i][$j] = $_;
   $j++;
   }
$i++;
}

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In reply to Read fortran list output by madd

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