version 1.25, 2010/11/07 01:57:50
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version 1.28, 2010/11/07 13:15:28
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Line 553 sub d2dt2_cubic_hermite {
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Line 553 sub d2dt2_cubic_hermite {
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# |
# |
sub array_index { |
sub array_index { |
my ($xmin,$xmax,$x)=@_; |
my ($xmin,$xmax,$x)=@_; |
return int(($x-$xmin)/($xmax-$xmin)*200.+0.5); |
return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); |
} |
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# |
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# Actual x-value of array index |
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# |
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sub index_x { |
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my ($xmin,$xmax,$i)=@_; |
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return $i*($xmax-$xmin)/200.+$xmin; |
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} |
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# |
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# Assume function to be linear between array points |
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# Return the two indices and the scale factor |
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# |
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sub indices_scale { |
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my ($xmin,$xmax,$x)=@_; |
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my $i=&array_index($xmin,$xmax,$x); |
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my $xr=&index_x($xmin,$xmax,$i); |
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if ($xr<$x) { |
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# Desired x is right of array index |
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if ($i>=200) { return (200,200,0); } |
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return($i,$i+1,200.*($x-$xr)/($xmax-$xmin)); |
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} elsif ($xr>$x) { |
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# Desired x is left of array index |
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if ($i<=0) { return (0,0,0); } |
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return($i-1,$i,1.-200.*($xr-$x)/($xmax-$xmin)); |
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} else { |
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# Desired x is at array index (unlikely, but ...) |
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if ($i>=200) { return (200,200,0); } |
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if ($i<=0) { return (0,0,0); } |
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return ($i,$i,0); |
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} |
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} |
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# |
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# Function value |
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# |
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sub func_val { |
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my ($xmin,$xmax,$x)=@_; |
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my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
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my $fl=$Apache::functionplotresponse::func[$il]; |
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my $fh=$Apache::functionplotresponse::func[$ih]; |
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unless (defined($fl) || defined($fh)) { return undef; } |
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unless (defined($fl)) { return $fh; } |
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unless (defined($fh)) { return $fl; } |
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return $fl+$factor*($fh-$fl); |
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} |
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# |
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# First derivative |
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# |
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sub dfuncdx_val { |
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my ($xmin,$xmax,$x)=@_; |
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my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
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my $fl=$Apache::functionplotresponse::dfuncdx[$il]; |
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my $fh=$Apache::functionplotresponse::dfuncdx[$ih]; |
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unless (defined($fl) || defined($fh)) { return undef; } |
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unless (defined($fl)) { return $fh; } |
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unless (defined($fh)) { return $fl; } |
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return $fl+$factor*($fh-$fl); |
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} |
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# |
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# Second derivative |
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# |
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sub d2funcdx2_val { |
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my ($xmin,$xmax,$x)=@_; |
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my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
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my $fl=$Apache::functionplotresponse::d2funcdx2[$il]; |
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my $fh=$Apache::functionplotresponse::d2funcdx2[$ih]; |
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unless (defined($fl) || defined($fh)) { return undef; } |
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unless (defined($fl)) { return $fh; } |
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unless (defined($fh)) { return $fl; } |
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return $fl+$factor*($fh-$fl); |
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} |
} |
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# |
# |
Line 641 sub d2funcdx2_val {
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Line 562 sub d2funcdx2_val {
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sub populate_arrays { |
sub populate_arrays { |
my ($id,$xmin,$xmax)=@_; |
my ($id,$xmin,$xmax)=@_; |
for (my $i=0; $i<=200; $i++) { |
for (my $i=0; $i<=400; $i++) { |
$Apache::functionplotresponse::func[$i]=undef; |
$Apache::functionplotresponse::func[$i]=undef; |
$Apache::functionplotresponse::dfuncdx[$i]=undef; |
$Apache::functionplotresponse::dfuncdx[$i]=undef; |
$Apache::functionplotresponse::d2funcd2x[$i]=undef; |
$Apache::functionplotresponse::d2funcd2x[$i]=undef; |
Line 662 sub populate_arrays {
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Line 583 sub populate_arrays {
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$env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); |
# Run in small steps over spline parameter |
# Run in small steps over spline parameter |
for (my $t=0; $t<=1; $t+=0.00025) { |
for (my $t=0; $t<=1; $t+=0.0001) { |
my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); |
my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); |
if ($xi<$xiold) { return 'no_func'; } |
if ($xi<$xiold) { return 'no_func'; } |
if (($xi>$xiold) && ($xi>=0) && ($xi<=200)) { |
if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { |
if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } |
if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } |
$xiold=$xi; |
$xiold=$xi; |
# Function value |
# Function value |
$Apache::functionplotresponse::func[$xi]=&cubic_hermite($t,@yparms); |
$Apache::functionplotresponse::func[$xi]=&cubic_hermite($t,@yparms); |
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# Chain rule |
# dy/dx=dy/dt/(dx/dt) |
# dy/dx=dy/dt/(dx/dt) |
my $dxdt=&ddt_cubic_hermite($t,@xparms); |
my $dxdt=&ddt_cubic_hermite($t,@xparms); |
if ($dxdt) { |
if ($dxdt) { |
$Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; |
$Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; |
} |
} |
# d^2y/dx^2 |
# Faa di Bruno |
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# d^2y/dx^2=(d^2y/dt^2)/(dx/dt)^2+(dy/dt)/(d^2x/dt^2) |
my $d2xdt2=&d2dt2_cubic_hermite($t,@xparms); |
my $d2xdt2=&d2dt2_cubic_hermite($t,@xparms); |
if ($d2xdt2) { |
if (($dxdt) && ($d2xdt2)) { |
$Apache::functionplotresponse::d2funcd2x[$xi]=&d2dt2_cubic_hermite($t,@yparms)/$d2xdt2; |
$Apache::functionplotresponse::d2funcdx2[$xi]= |
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&d2dt2_cubic_hermite($t,@yparms)/($dxdt*$dxdt) |
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+&ddt_cubic_hermite($t,@yparms)/$d2xdt2; |
} |
} |
} |
} |
} |
} |
Line 786 sub start_functionplotresponse {
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Line 711 sub start_functionplotresponse {
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} |
} |
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sub compare_rel { |
sub compare_rel { |
my ($relationship,$value,$val,$tol)=@_; |
my ($relationship,$value,$realval,$tol)=@_; |
if (abs($value-$val)<$tol) { return 1; } |
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&Apache::lonnet::logthis("Rel $relationship Val $value RV $realval T $tol"); |
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# is the real value defined? |
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unless (defined($realval)) { |
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if ($relationship eq 'eq') { |
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if ($value eq 'undef') { |
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return 1; |
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} else { |
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return 0; |
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} |
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} elsif ($relationship eq 'ne') { |
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if ($value eq 'undef') { |
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return 0; |
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} else { |
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return 1; |
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} |
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} else { |
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return 0; |
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} |
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} |
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# it is defined. |
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if ($relationship eq 'gt') { |
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return ($realval>$value); |
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} elsif ($relationship eq 'ge') { |
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return ($realval>$value-$tol); |
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} elsif ($relationship eq 'lt') { |
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return ($realval<$value); |
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} elsif ($relationship eq 'le') { |
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return ($realval<$value+$tol); |
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} elsif ($relationship eq 'ne') { |
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return (abs($value-$realval)>$tol); |
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} else { |
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return (abs($value-$realval)<$tol); |
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} |
return 0; |
return 0; |
} |
} |
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Line 813 sub functionplotrulecheck {
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Line 773 sub functionplotrulecheck {
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if ($xinitial eq '') { |
if ($xinitial eq '') { |
$xinitial=0; |
$xinitial=0; |
} |
} |
if ($xfinal ne '') { |
if ($xfinal eq '') { |
if ($xinitial>$xfinal) { |
$xfinal=$xinitial; |
$xfinal=$xinitial; |
} |
} |
if ($xinitial>$xfinal) { |
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$xfinal=$xinitial; |
} |
} |
&Apache::lonnet::logthis("Init $xinitial Final $xfinal"); |
&Apache::lonnet::logthis("Init $xinitial Final $xfinal"); |
if (($xfinal eq '') || ($xinitial==$xfinal)) { |
my $tol=$tolfunc; |
# This is only one point |
if ($derivative==2) { |
&Apache::lonnet::logthis("One point $xinitial"); |
$tol=$told2fdx2; |
my $tol; |
} elsif ($derivative==1) { |
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$tol=$toldfdx; |
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} |
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my $li=&array_index($xmin,$xmax,$xinitial); |
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my $lh=&array_index($xmin,$xmax,$xfinal); |
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for (my $i=$li; $i<=$lh; $i++) { |
my $val; |
my $val; |
if ($derivative==2) { |
if ($derivative==2) { |
$val=&d2funcdx2_val($xmin,$xmax,$xinitial); |
&Apache::lonnet::logthis("Second ". |
$tol=$told2fdx2; |
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$Apache::functionplotresponse::d2funcdx2[$i-1].'__'.$Apache::functionplotresponse::d2funcdx2[$i].'__'.$Apache::functionplotresponse::d2funcdx2[$i+1]); |
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$val=$Apache::functionplotresponse::d2funcdx2[$i]; |
} elsif ($derivative==1) { |
} elsif ($derivative==1) { |
$val=&dfuncdx_val($xmin,$xmax,$xinitial); |
$val=$Apache::functionplotresponse::dfuncdx[$i]; |
$tol=$toldfdx; |
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} else { |
} else { |
$val=&func_val($xmin,$xmax,$xinitial); |
$val=$Apache::functionplotresponse::func[$i]; |
$tol=$tolfunc; |
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} |
} |
&Apache::lonnet::logthis("Value $value ActVal $val Tol $tol"); |
unless (&compare_rel($relationship,$value,$val,$tol)) { return 0; }; |
return &compare_rel($relationship,$value,$val,$tol); |
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} else { |
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# This is a range |
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} |
} |
return 0; |
return 1; |
} |
} |
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sub end_functionplotresponse { |
sub end_functionplotresponse { |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
&Apache::response::end_response; |
&Apache::response::end_response; |
Line 857 sub end_functionplotresponse {
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Line 820 sub end_functionplotresponse {
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&& &Apache::response::submitted() |
&& &Apache::response::submitted() |
&& $Apache::lonhomework::type eq 'exam') { |
&& $Apache::lonhomework::type eq 'exam') { |
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#&Apache::response::scored_response($partid,$id); |
&Apache::response::scored_response($partid,$id); |
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} elsif ($target eq 'grade' |
} elsif ($target eq 'grade' |
&& &Apache::response::submitted() |
&& &Apache::response::submitted() |
Line 876 sub end_functionplotresponse {
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Line 839 sub end_functionplotresponse {
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$ymin=(defined($ymin)?$ymin:-10); |
$ymin=(defined($ymin)?$ymin:-10); |
my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); |
my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); |
$ymax=(defined($ymax)?$ymax:10); |
$ymax=(defined($ymax)?$ymax:10); |
my $tolfunc=($ymax-$ymin)/100.; |
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my $percent=&Apache::lonxml::get_param('percenterror',$parstack,$safeeval); |
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$percent=(defined($percent)?$percent:5); |
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my $tolfunc=$percent*($ymax-$ymin)/100.; |
my $toldfdx=1; |
my $toldfdx=1; |
my $told2fdx2=1; |
my $told2fdx2=1; |
if ($xmax>$xmin) { |
if ($xmax>$xmin) { |