Error bars are graphical representations of the variability of data and used on graphs to indicate the error or uncertainty in a reported measurement.

Its really easy to make Error bars graphical representation in chartphp.

Step 1: Include Charts 4 PHP Library

include("../../lib/inc/chartphp_dist.php");
$p = new chartphp();

Step 3: Set Array Configuration

$errbar_data = 
       array( 
          array( 
            array("Jan",80.25,51), 
            array("Feb",138.75,15.5), 
            array("Mar",185.50,12), 
            array("Apr",370.50,52.5), 
            array("May",266.80,78.5), 
            array("Jun",350,55.5), 
            array("Jul",245,63), 
            array("Aug",129,99.5), 
            array("Sep",490,33.9), 
            array("Oct",323,26), 
            array("Nov",255,15.5), 
            array("Dec",450,31.5)
               ) ); 
$p->data = $errbar_data ;

Step 3: Set Chart type

$p->chart_type = "error-bar";

Step 4: Render Chart

$out = $p->render("c1");

 

Whats Next:

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