Small graph problem

[waynew]

Hey guys I have a problem. Okay, I'm just going paste the code first:

Explanation of code in code...  :-\

Problem stated below code.

 

Thanks.

 

<?php
include('stats.php');
//This graph shows profit, cost and end price.

if(isset($_GET['startdate']) && isset($_GET['enddate'])){ //check to see if user is wanting to limit dates
   
   $dates_selected = true; //this means that the user has chosen to select a time period.
   $start_date = $_GET['startdate']; //begin date.
   $end_date = $_GET['enddate']; //end date.
   
   $end_date =  $end_date - $start_date;
   
   //Start date and end dates are not really dates. They are index keys.
   //If there are three months and the user wants to see only the last two months
   //the start date will be 1 and the end date will be 2. indexes begin at 0
   
   //Split up together in order to maintain sync of timeline and sum.
   $x_months = array_slice($x_months,$start_date,$end_date+1); //$x_months is an array of ten months
   $monthly_profit = array_slice($monthly_profit,$start_date,$end_date+1); //$monthly_profit syncs in key with $x_months
}

include ( 'src/jpgraph.php');
include ('src/jpgraph_line.php' );
$graph = new Graph(900,400,"auto");
$graph->SetScale( "textlin");

$lineplot1 = new LinePlot($monthly_profit);
$lineplot1 ->SetColor("blue");

$graph->xaxis->SetTickLabels($x_months);

$lineplot1->SetLegend ("Profit");


$graph ->legend->Pos( 0.05,0.5,"right" ,"center");
$graph->img-> SetMargin(80,80 ,80,80);
$graph->xaxis-> title->Set("Months" );
$graph->tabtitle->Set('Profit'); 
$graph->title->Set ('Roadway Sales');

$graph->Add($lineplot1);
$graph->Stroke();

?>

 

The problem is that when I try to resize the timescale on the graph, the actual figure for each month is off. For instance, in March 08, no profit was recorded, yet when I resize the graph, Dec 07 is shown to have no profit when that's not the case.

[waynew]

The problem isn't with the graph. It's with the arrays.

[waynew]

Please somebody help. Deadline is in an hour and I'm stumped.

[waynew]

I will explain a little clearer.

 

$monthly_profit at the moment contains 10 values.

$x_months contains 10 values.

 

$monthly_profit[1] is the total profit for $x_months[1] and so on etc

$x_months contains months, and $monthly_profit contains the total profit for those months. I've checked with sizeof and they are exact same size so they are on sync.