function drawtriSSS($a, $b, $c)
{
$labels = array_slice(func_get_args(), 3);
for ($i = 0; $i < 6; $i++) {
if (!isset($labels[$i])) {
$labels[$i] = '';
}
$len[$i] = strlen($labels[$i]);
}
$xp = ($a * $a + $b * $b - $c * $c) / (2 * $b);
$yp = sqrt($a * $a - $xp * $xp);
//$com = "setBorder(10); initPicture(".(-.1*$m*$len[3]).','.($w+.1*$m*$len[1]).','.(-.1*$m*$len[2]).','.($h+.1*$m*$len[0]).');';
$m = max(max($b, $xp), $yp);
$com = "setBorder(10); initPicture(-.1*{$m},1.1*{$m},-.1*{$m},1.1*{$m});";
$com .= "path([[0,0],[{$xp},{$yp}],[{$b},0],[0,0]]);";
if ($len[0] > 0) {
$com .= "text([{$xp}/2-.1*{$b}/{$yp},{$yp}/2+.1*{$b}/{$yp}],\"{$labels[0]}\",\"left\");";
}
if ($len[1] > 0) {
$com .= "text([{$b}/2,0],\"{$labels[1]}\",\"below\");";
}
if ($len[2] > 0) {
if ($xp > $b) {
$com .= "text([({$b}+{$xp}+.1*{$b}/{$yp})/2,{$yp}/2+.1*{$b}/{$yp}],\"{$labels[2]}\",\"right\");";
} else {
$com .= "text([({$b}+{$xp}+.1*{$b}/{$yp})/2,{$yp}/2+.1*{$b}/{$yp}],\"{$labels[2]}\",\"right\");";
}
}
$dw = 200;
$dh = 200;
return showasciisvg($com, $dw, $dh);
}
function graphdrawschedule($sc, $w = 600, $h = -1, $names = array())
{
$p = count($sc);
if ($h == -1) {
$h = 70 * $p;
}
//text label is around 40 px, so can do w/40 labels. Divide ct / (w/40)
$colors = array('red', 'blue', 'green', 'orange', 'cyan', 'yellow', 'purple');
$ct = graphschedulecompletion($sc);
$sp = ceil($ct / ($w / 25));
//penacto - video thing
$com = "setBorder(12,8,12,20);initPicture(0,{$ct},0,{$p});stroke='gray';";
for ($i = 0; $i <= $ct; $i++) {
$com .= "line([{$i},-.1],[{$i},{$p}+.1]);";
}
$com .= "stroke='black';";
for ($i = 0; $i <= $ct; $i += $sp) {
$com .= "text([{$i},{$p}],'{$i}','above');";
$com .= "line([{$i},-.1],[{$i},{$p}+.1]);";
}
$com .= "fill='gray';rect([0,0],[{$ct},{$p}]);";
for ($i = 1; $i < $p; $i++) {
$com .= "line([0,{$i}],[{$ct},{$i}]);";
}
$com .= "fontbackground='white';";
$cnt = 0;
foreach ($sc as $n => $tl) {
foreach ($tl as $ti) {
$col = $colors[$cnt % 7];
$cnt++;
if (count($names) == 0) {
$tn = 'T' . ($ti[0] + 1);
} else {
$tn = $names[$ti[0]];
}
$com .= "fill='{$col}';rect([" . $ti[1] . "," . ($p - $n - 1) . "],[" . ($ti[1] + $ti[2]) . "," . ($p - $n) . "]);";
$com .= "text([" . ($ti[1] + 0.5 * $ti[2]) . "," . ($p - $n - 0.5) . "],'{$tn}');";
}
}
return showasciisvg($com, $w, $h);
}
function boxplot($arr, $label)
{
if (func_num_args() > 2) {
$dlbls = func_get_arg(2);
}
if (is_array($arr[0])) {
$multi = count($arr);
} else {
$multi = 1;
}
$st = '';
$bigmax = -10000000;
$bigmin = 100000000;
$alt = "Boxplot, axis label: {$label}. ";
for ($i = 0; $i < $multi; $i++) {
if ($multi == 1) {
$a = $arr;
} else {
$a = $arr[$i];
}
sort($a, SORT_NUMERIC);
$max = $a[count($a) - 1];
if ($max > $bigmax) {
$bigmax = $max;
}
if ($a[0] < $bigmin) {
$bigmin = $a[0];
}
$q1 = percentile($a, 25);
$q2 = percentile($a, 50);
$q3 = percentile($a, 75);
$yl = 2 + 5 * $i;
$ym = $yl + 1;
$yh = $ym + 1;
$st .= "line([{$a['0']},{$yl}],[{$a['0']},{$yh}]); rect([{$q1},{$yl}],[{$q3},{$yh}]); line([{$q2},{$yl}],[{$q2},{$yh}]);";
$st .= "line([{$max},{$yl}],[{$max},{$yh}]); line([{$a['0']},{$ym}],[{$q1},{$ym}]); line([{$q3},{$ym}],[{$max},{$ym}]);";
$alt .= 'Boxplot ';
if (isset($dlbls[$i])) {
$alt .= "for {$dlbls[$i]}";
} else {
$alt .= $i + 1;
}
$alt .= ": Left whisker at {$a[0]}. Leftside of box at {$q1}. Line through box at {$q2}. Rightside of box at {$q3}. Right whisker at {$max}.\n";
}
if ($GLOBALS['sessiondata']['graphdisp'] == 0) {
return $alt;
}
$outst = "setBorder(15); initPicture({$bigmin},{$bigmax},-3," . 5 * $multi . ");";
$dw = $bigmax - $bigmin;
if ($dw > 100) {
$step = 20;
} else {
if ($dw > 50) {
$step = 10;
} else {
if ($dw > 20) {
$step = 5;
} else {
$step = 1;
}
}
}
$outst .= "axes({$step},100,1,null,null,1,'off');";
$outst .= "text([" . ($bigmin + 0.5 * $dw) . ",-3],\"{$label}\");";
if (isset($dlbls)) {
for ($i = 0; $i < $multi; $i++) {
if ($multi > 1) {
$dlbl = $dlbls[$i];
} else {
$dlbl = $dlbls;
}
$st .= "text([{$bigmin}," . (5 + 5 * $i) . "],\"{$dlbl}\",\"right\");";
}
}
$outst .= $st;
return showasciisvg($outst, 400, 50 + 50 * $multi);
}
function normalcurve3($mu, $sigma, $a, $b, $axislabel = '', $x = null, $dirx = 'left', $y = null, $diry = 'right', $color = 'blue', $q = null, $dirq = 'left', $r = null, $dirr = 'right', $color2 = 'red', $w = 400, $h = 150)
{
if ($sigma <= 0) {
echo 'Invalid sigma';
return;
}
if ($y !== null && $y < $x) {
echo 'Second value should be bigger than the first';
return;
}
if ($a >= $b) {
echo 'xmin should be smaller than xmax';
return;
}
if ($y !== null && $dirx == $diry) {
echo 'directions should not be equal';
return;
}
$za = ($a - $mu) / $sigma;
$zb = ($b - $mu) / $sigma;
if ($x !== null) {
$zx = ($x - $mu) / $sigma;
}
if ($y !== null) {
$zy = ($y - $mu) / $sigma;
}
if ($q !== null) {
$zq = ($q - $mu) / $sigma;
}
if ($r !== null) {
$zr = ($r - $mu) / $sigma;
}
$dz = ($zb - $za) / 80;
$zab = $za - $sigma;
$zbb = $zb + $sigma;
$plot = "setBorder(10,30,10,5);initPicture({$za},{$zb},-.1,.45);line([{$zab},0],[{$zbb},0]);";
for ($i = ceil($za); $i < $zb + $dz; $i++) {
$label = $mu + $i * $sigma;
$plot .= "line([{$i},.02],[{$i},-.02]);text([{$i},-.01],\"{$label}\",\"below\");";
}
$midx = $w / 2;
$plot .= "textabs([{$midx},0],'{$axislabel}','above');";
$pts = array();
$xpts = array();
$ypts = array();
$qpts = array();
$rpts = array();
$coef = 1 / sqrt(2 * 3.1415926);
if ($x !== null && $dirx == 'right') {
$py = $coef * exp(-$zx * $zx / 2);
$xpts[] = "[{$zx},0]";
$xpts[] = "[{$zx},{$py}]";
}
if ($y !== null && $diry == 'right') {
$py = $coef * exp(-$zy * $zy / 2);
$ypts[] = "[{$zy},{$py}]";
}
if ($q !== null && $dirq == 'right') {
$pr = $coef * exp(-$zq * $zq / 2);
$qpts[] = "[{$zq},0]";
$qpts[] = "[{$zq},{$pr}]";
}
if ($r !== null && $dirr == 'right') {
$pr = $coef * exp(-$zr * $zr / 2);
$rpts[] = "[{$zr},{$pr}]";
}
for ($z = $za; $z <= $zb + 1.0E-5; $z += $dz) {
$py = $coef * exp(-$z * $z / 2);
$pts[] = "[{$z},{$py}]";
if ($x !== null && ($dirx == 'left' && $z < $zx || $dirx == 'right' && $z > $zx && ($y === null || $z < $zy))) {
$xpts[] = "[{$z},{$py}]";
}
if ($y !== null && $diry == 'right' && $z > $zy) {
$ypts[] = "[{$z},{$py}]";
}
if ($q !== null && ($dirq == 'left' && $z < $zq || $dirq == 'right' && $z > $zq && ($r === null || $z < $zr))) {
$qpts[] = "[{$z},{$py}]";
}
if ($r !== null && $dirr == 'right' && $z > $zr) {
$rpts[] = "[{$z},{$py}]";
}
}
if ($x !== null && $dirx == 'left') {
$py = $coef * exp(-$zx * $zx / 2.0);
$xpts[] = "[{$zx},{$py}]";
$xpts[] = "[{$zx},0]";
$xpts[] = "[{$za},0]";
}
if ($x !== null && $dirx == 'right' && $y === null) {
$xpts[] = "[{$zb},0]";
}
if ($y !== null && $diry == 'left') {
$py = $coef * exp(-$zy * $zy / 2.0);
$xpts[] = "[{$zy},{$py}]";
$xpts[] = "[{$zy},0]";
$xpts[] = "[{$zx},0]";
}
if ($y !== null && $diry == 'right') {
$ypts[] = "[{$zb},0]";
$ypts[] = "[{$zy},0]";
}
if ($q !== null && $dirq == 'left') {
$py = $coef * exp(-$zq * $zq / 2.0);
$qpts[] = "[{$zq},{$py}]";
$qpts[] = "[{$zq},0]";
$qpts[] = "[{$zq},0]";
}
if ($q !== null && $dirq == 'right' && $r === null) {
$qpts[] = "[{$zb},0]";
}
if ($r !== null && $dirr == 'left') {
$py = $coef * exp(-$zr * $zr / 2.0);
$qpts[] = "[{$zr},{$py}]";
$qpts[] = "[{$zy},0]";
$qpts[] = "[{$zx},0]";
}
if ($r !== null && $dirr == 'right') {
$rpts[] = "[{$zb},0]";
$rpts[] = "[{$zy},0]";
}
$plot .= 'fill="none";path([' . implode(',', $pts) . ']);';
if ($x !== null) {
$plot .= 'fill="' . $color . '";path([' . implode(',', $xpts) . ']);';
}
if ($y !== null && $diry == 'right') {
$plot .= 'fill="' . $color . '";path([' . implode(',', $ypts) . ']);';
}
if ($q !== null) {
$plot .= 'fill="' . $color2 . '";path([' . implode(',', $qpts) . ']);';
}
if ($r !== null && $dirr == 'right') {
$plot .= 'fill="' . $color2 . '";path([' . implode(',', $rpts) . ']);';
}
return showasciisvg($plot, $w, $h);
}