/**
* construct multigraph
*/
public function Values($values)
{
parent::Values($values);
if (!$this->values->error) {
$this->multi_graph = new MultiGraph($this->values, $this->force_assoc, $this->datetime_keys, $this->require_integer_keys);
}
}
/**
* Process the values
*/
public function Values($values)
{
if (!empty($values)) {
parent::Values($values);
$values = array();
// find min, max, strip out nulls
$min = $max = NULL;
foreach ($this->values[0] as $item) {
if (!is_null($item->value)) {
if (is_null($min) || $item->value < $min) {
$min = $item->value;
}
if (is_null($max) || $item->value > $max) {
$max = $item->value;
}
$values[] = $item->value;
}
}
// calculate increment?
if ($this->increment <= 0) {
$diff = $max - $min;
if ($diff <= 0) {
$inc = 1;
} else {
$inc = pow(10, floor(log10($diff)));
$d1 = $diff / $inc;
if (($inc != 1 || !is_integer($diff)) && $d1 < 4) {
if ($d1 < 3) {
$inc *= 0.2;
} else {
$inc *= 0.5;
}
}
}
$this->increment = $inc;
}
// prefill the map with nulls
$map = array();
$start = $this->Interval($min);
$end = $this->Interval($max, true) + $this->increment / 2;
Graph::SetNumStringOptions($this->settings['decimal'], $this->settings['thousands']);
for ($i = $start; $i < $end; $i += $this->increment) {
$key = (int) $i;
$map[$key] = null;
}
foreach ($values as $val) {
$k = (int) $this->Interval($val);
if (!array_key_exists($k, $map)) {
$map[$k] = 1;
} else {
$map[$k]++;
}
}
if ($this->percentage) {
$total = count($values);
$pmap = array();
foreach ($map as $k => $v) {
$pmap[$k] = 100 * $v / $total;
}
$values = $pmap;
} else {
$values = $map;
}
// turn off structured data
$this->structure = NULL;
$this->structured_data = FALSE;
// set up options to make bar graph class draw the histogram properly
$this->minimum_units_y = 1;
$this->subdivision_h = $this->increment;
// no subdiv below bar size
$this->grid_division_h = max($this->increment, $this->grid_division_h);
$amh = $this->axis_min_h;
if (empty($amh)) {
$this->axis_min_h = $start;
}
}
parent::Values($values);
}
/**
* construct multigraph
*/
public function Values($values)
{
parent::Values($values);
$this->multi_graph = new MultiGraph($this->values, $this->force_assoc);
}
