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Language Reference » Dataset functions » setAbsicssaPosition
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setAbscissaPosition - Set the position of the abcissa axis This function allows you to define the position of the abcissa axis (X). Calling this function
setAbscissaName($Position) Where : Position can be either set to AXIS_POSITION_BOTTOM or AXIS_POSITION_TOP. Sample script 
/* pChart library inclusions */
include("../class/pData.class.php");
include("../class/pDraw.class.php");
include("../class/pImage.class.php");
/* Create and populate the pData object */
$MyData = new pData();
$MyData->addPoints(array(4,VOID,VOID,12,8,3),"Probe 1");
$MyData->addPoints(array(3,12,15,8,5,5),"Probe 2");
$MyData->addPoints(array(2,7,5,18,19,22),"Probe 3");
$MyData->setPalette("Probe 1",array("R"=>220,"G"=>60,"B"=>20));
$MyData->setSerieTicks("Probe 2",4);
$MyData->setSerieWeight("Probe 3",2);
$MyData->setAxisName(0,"Temperatures");
$MyData->addPoints(array("Jan","Feb","Mar","Apr","May","Jun"),"Labels");
$MyData->setSerieDescription("Labels","Months");
$MyData->setAbscissa("Labels");
/* Reverse the Y axis trick */
$MyData->setAbsicssaPosition(AXIS_POSITION_TOP);
$MyData->negateValues(array("Probe 1","Probe 2","Probe 3"));
$MyData->setAxisDisplay(0,AXIS_FORMAT_CUSTOM,"NegateValuesDisplay");
function NegateValuesDisplay($Value) { if ( $Value == VOID ) { return(VOID); } else { return(-$Value); } }
/* Create the pChart object */
$myPicture = new pImage(700,230,$MyData);
/* Turn of Antialiasing */
$myPicture->Antialias = FALSE;
/* Draw a background */
$Settings = array("R"=>190, "G"=>213, "B"=>107, "Dash"=>1, "DashR"=>210, "DashG"=>223, "DashB"=>127);
$myPicture->drawFilledRectangle(0,0,700,230,$Settings);
/* Add a border to the picture */
$myPicture->drawRectangle(0,0,699,229,array("R"=>0,"G"=>0,"B"=>0));
/* Write the chart title */
$myPicture->setFontProperties(array("FontName"=>"../fonts/Forgotte.ttf","FontSize"=>11));
$myPicture->drawText(150,35,"Average temperature",array("FontSize"=>20,"Align"=>TEXT_ALIGN_BOTTOMMIDDLE));
/* Set the default font */
$myPicture->setFontProperties(array("FontName"=>"../fonts/pf_arma_five.ttf","FontSize"=>6));
/* Define the chart area */
$myPicture->setGraphArea(60,60,650,220);
/* Draw the scale */
$scaleSettings = array("XMargin"=>10,"YMargin"=>10,"Floating"=>TRUE,"GridR"=>200, "GridG"=>200,"GridB"=>200,"DrawSubTicks"=>TRUE, "CycleBackground"=>TRUE);
$myPicture->drawScale($scaleSettings);
/* Turn on Antialiasing */
$myPicture->Antialias = TRUE;
/* Draw the line chart */
$myPicture->drawSplineChart();
$myPicture->drawPlotChart(array("PlotBorder"=>TRUE,"BorderSize"=>1,"Surrounding"=>-60,"BorderAlpha"=>80));
/* Write the chart legend */
$myPicture->drawLegend(540,20,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));
/* Render the picture (choose the best way) */
$myPicture->autoOutput("pictures/example.drawSplineChart.simple.png");
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