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  Adding Extra Fields to 3D Scatter Chart
Posted by Jane Wilson on Jul-06-2016 01:58
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Hi! I'm using php and trying to create a 3D Scatter Chart with labels on each of the data points - is that possible?


# The data for the bar chart
$data = array($BK_E1_0052_pcnt, $BK_E2_0341_pcnt, $BK_E3_0261_pcnt, $BK_E4_0171_pcnt, $BK_E5_0271_pcnt, $BK_E6_0252_pcnt, $BK_E7_0211_pcnt, $BK_E8_0321_pcnt, $BK_E9_0161_pcnt);

# The XYZ data for the 3D scatter chart as 3 random data series
$r = new RanSeries(3);
$xData = $r->getSeries2(20, 100, -9, 9);
$yData = $r->getSeries2(20, 100, -9, 9);
$zData = $data;

# Create a ThreeDScatterChart object of size 720 x 520 pixels
$c = new ThreeDScatterChart(720, 520);

# Add a title to the chart using 20 points Times New Roman Italic font
#$c->addTitle("3D Scatter Chart (2)  ", "timesi.ttf", 20);

# Set the center of the plot region at (350, 240), and set width x depth x height to 360 x 360 x 270
# pixels
$c->setPlotRegion(350, 240, 360, 360, 270);

# Set the elevation and rotation angles to 15 and 30 degrees
$c->setViewAngle(15, 30);

# Add a scatter group to the chart using 13 pixels glass sphere symbols, in which the color depends
# on the z value of the symbol
$g = $c->addScatterGroup($xData, $yData, $zData, "Sites", GlassSphere2Shape, 13, SameAsMainColor);

# Add labels to the chart as an extra field
$g->addExtraField("BES", "CES", "DES", "EES", "MES", "PGES", "SHES", "SES", "WES");

# Add grey (888888) drop lines to the symbols
$g->setDropLine(0x888888);

# Add a color axis (the legend) in which the left center is anchored at (645, 220). Set the length
# to 200 pixels and the labels on the right side. Use smooth gradient coloring.
$colorAxisObj = $c->setColorAxis(645, 220, Left, 200, Right);
$colorAxisObj->setColorGradient();

# Set the x, y and z axis titles using 10 points Arial Bold font
#$c->xAxis->setTitle("X-Axis Place Holder", "arialbd.ttf", 10);
#$c->yAxis->setTitle("Y-Axis Place Holder", "arialbd.ttf", 10);
$c->zAxis->setTitle("% of Goal", "arialbd.ttf", 10);

# Output the chart
#header("Content-type: image/png");
#print($c->makeChart2(PNG));
$chart_BES_MO_URL = $c->makeSession("chart_BES_MO");
# Create an image map for the chart
$imageMap_BES_MO = $c->getHTMLImageMap("cylinderbar.php");

I can create the chart just fine without the addExtraField parameter but when I include it, I get this message:
Fatal error: Call to undefined method ThreeDScatterGroup::addExtraField() 

Is it possible for me to add labels to each of the points?
Thanks,
Jane

  Re: Adding Extra Fields to 3D Scatter Chart
Posted by Peter Kwan on Jul-07-2016 00:16
| Reply | Monitor
Hi Jane,

You would need to use BaseChart.addText to label the symbols in the ThreeDScatterChart. It is like:

.... create the chart as usual ....

#auto-scale the axis
$c->layout();

for ($i = 0; $i < count($xData); ++$i) {
    $xCoor = $c->getXCoor($xData[$i], $yData[$i], $zData[$i];
    $yCoor = $c->getYCoor($xData[$i], $yData[$i], $zData[$i]);
    $c->addText($xCoor, $yCoor, $data[$i], "arialbd.ttf", 8, 0x000000, Left);
}

Hope this can help.

Regards
Peter Kwan