Data type: data-data calculated from a function.

	$dx = ".3";
	$max = 6.4;
	$maxi = $max/$dx;
	for ($i=0; $i<$maxi; $i++) {
		$a = 4;
		$x = $dx*$i;
		$data[$i] = array("", $x, $a*sin($x), 
                              $a*cos($x), $a*cos($x+1)); 	
	}

Chart type: Lines Lines and points Points Thin bars