How to create multiple plots in jsGraph (PHP) using arrays of varying sizes?

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To create multiple plots in jsGraph using arrays of varying sizes, you will need to use loops and conditional statements. Here is a sample code that demonstrates how to achieve this:

<?php 
  // Sample data for plotting 
  $xdata = array(0, 1, 2, 3, 4); 
  $ydata1 = array(0, 2, 4, 6, 8); 
  $ydata2 = array(1, 3, 5); 
  $ydata3 = array(1, 2, 3, 4); 

  // Initialize jsGraph object 
  require_once('jsgraph/jsgraph.php'); 
  $graph = new Graph(); 

  // Create data sets 
  $datasets = array( 
    array($xdata, $ydata1), 
    array($xdata, $ydata2), 
    array($xdata, $ydata3) ); 

  foreach ($datasets as $idx => $data) { // loop through each dataset 
    $xdata = $data[0]; 
    $ydata = $data[1]; 
    $dataset = new DataSet(); 
    $dataset->AddPoints($xdata, $ydata); 

    // Create new plot 
    $plotNew = new LinePlot($dataset); 
    $plotNew->SetColor('blue'); 
    $plotNew->SetWeight(2); 

    // Add plot to graph 
    $graph->Add($plotNew); 
  } 

  // Generate graph 
  $graph->Stroke(); 
?>

In this code, we first define the sample data for plotting, including three arrays of varying sizes. We then initialize the jsGraph object and create an array of data sets, with each data set containing an array of x-data and y-data.

Next, we loop through each data set and extract the x-data and y-data arrays. We then create a new DataSet object and populate it with the x-data and y-data arrays using the AddPoints() method.

We then create a new LinePlot object and set its color and weight properties. We add the plot to the graph using the Add() method.

Finally, we generate the graph using the Stroke() method.

Note that in this example, we assume that the x-data array is the same for all plots. If your x-data arrays are different, you will need to modify the code accordingly.