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Diff for /loncom/homework/default_homework.lcpm between versions 1.58 and 1.59

version 1.58, 2003/03/25 22:53:22 version 1.59, 2003/03/25 23:00:18
Line 234  sub html { Line 234  sub html {
   }    }
 }  }
   
 sub problem {  
   return '1';  
 }  
   
 sub hinton {  sub hinton {
   return 0;    return 0;
 }  }
Line 424  sub log { log(shift) } Line 420  sub log { log(shift) }
 sub atan2 { atan2($_[0],$_[1]) }  sub atan2 { atan2($_[0],$_[1]) }
 sub sqrt { sqrt(shift) }  sub sqrt { sqrt(shift) }
   
 sub tan  { sin($_[0]) / cos($_[0]) }  sub tan  { CORE::sin($_[0]) / CORE::cos($_[0]) }
 #sub atan { atan2($_[0], 1); }  #sub atan { atan2($_[0], 1); }
 #sub acos { atan2(sqrt(1 - $_[0] * $_[0]), $_[0] ); }  #sub acos { atan2(sqrt(1 - $_[0] * $_[0]), $_[0] ); }
 #sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) );  }  #sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) );  }
   
 sub log10 { log($_[0])/log(10); }  sub log10 { CORE::log($_[0])/CORE::log(10); }
   
 sub factorial {  sub factorial {
     my $input = int(shift);      my $input = CORE::int(shift);
     return "Error - unable to take factorial of an negative number ($input)" if $input < 0;      return "Error - unable to take factorial of an negative number ($input)" if $input < 0;
     return "Error - factorial result is greater than system limit ($input)" if $input > 170;      return "Error - factorial result is greater than system limit ($input)" if $input > 170;
     return 1 if $input == 0;      return 1 if $input == 0;
Line 475  sub sub_string { Line 471  sub sub_string {
 }  }
   
 sub pow   {return $_[0] ** $_[1]; }  sub pow   {return $_[0] ** $_[1]; }
 sub ceil  {return (($_[0]-int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? (int($_[0])+ 1) : int($_[0])); }  sub ceil  {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? (CORE::int($_[0])+ 1) : CORE::int($_[0])); }
 sub floor  {return (($_[0]-int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? int($_[0]) : (int($_[0])-1)); }  sub floor  {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? CORE::int($_[0]) : (CORE::int($_[0])-1)); }
 #sub floor {return int($_[0]); }  #sub floor {return int($_[0]); }
   
 sub format {  sub format {
Line 719  sub array_moments { Line 715  sub array_moments {
     $kurt+=$x**4;      $kurt+=$x**4;
   }    }
   $output[2]=$var/($N-1);    $output[2]=$var/($N-1);
   $sdev=sqrt($output[2]);    $sdev=CORE::sqrt($output[2]);
   if ($sdev == 0) {    if ($sdev == 0) {
      $output[3]="inf-variance=0";       $output[3]="inf-variance=0";
      $output[4]="inf-variance=0";       $output[4]="inf-variance=0";
Removed from v.1.58  
changed lines
  Added in v.1.59

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