#Charting examples

Simple chart

  $chart = array(
      '#chart_id' => 'test_chart',
      '#title' => t('Servings'),
      '#type' => CHART_TYPE_PIE_3D,
    );
    
  $chart['#data']['fruits'] = 3;
  $chart['#data']['meats']  = 2;
  $chart['#data']['dairy']  = 5;

  echo chart_render($chart);

Labels, title styling, and chart size

  $chart = array(
      '#chart_id' => 'test_chart',
      '#title' => chart_title(t('Servings'), 'cc0000', 15),
      '#type' => CHART_TYPE_PIE,
      '#size' => chart_size(400, 200),
    );
    
  $chart['#data']['fruits'] = 3;
  $chart['#data']['meats']  = 2;
  $chart['#data']['dairy']  = 5;

  $chart['#labels'][] = t('Fruits');
  $chart['#labels'][] = t('Meats');
  $chart['#labels'][] = t('Dairy');

  echo chart_render($chart);

Custom data colors

Alternatively use the the Color Schemes Hook which can be then associated to multiple charts containing some or all of the same content. You may want to consider chart_unique_color();

  $chart = array(
      '#chart_id' => 'test_chart',
      '#title' => chart_title(t('Servings'), 'cc0000', 15),
      '#type' => CHART_TYPE_PIE,
      '#size' => chart_size(400, 200),
    );
    
  $chart['#data']['fruits'] = 3;
  $chart['#data']['meats']  = 2;
  $chart['#data']['dairy']  = 5;

  $chart['#labels'][] = t('Fruits');
  $chart['#labels'][] = t('Meats');
  $chart['#labels'][] = t('Dairy');
  
  $chart['#data_colors'][] = '00ff00';
  $chart['#data_colors'][] = 'ff0000';
  $chart['#data_colors'][] = '0000ff';

  echo chart_render($chart);

Line chart, legends, resolution adjustment, and label positioning

As you can see in the chart below, the resolution of the encoding type chosen does not reflect well with the data provided. So in the chart below it, we set "'#adjust_resolution' => TRUE,".

 $chart = array(
      '#chart_id' => 'test_chart',
      '#title' => chart_title(t('Servings'), 'cc0000', 15),
      '#type' => CHART_TYPE_LINE,
      '#size' => chart_size(400, 200),
      '#adjust_resolution' => TRUE,
    );
    
  $chart['#data']['fruits'] = array(1, 3, 5, 4, 2);
  $chart['#data']['meats']  = array(2, 2, 4, 3, 1);
  $chart['#data']['dairy']  = array(5, 2, 3, 1, 2);

  $chart['#legends'][] = t('Fruits');
  $chart['#legends'][] = t('Meats');
  $chart['#legends'][] = t('Dairy');

  $chart['#data_colors'][] = '00ff00';
  $chart['#data_colors'][] = 'ff0000';
  $chart['#data_colors'][] = '0000ff';

  $chart['#mixed_axis_labels'][CHART_AXIS_Y_LEFT][0][] = chart_mixed_axis_range_label(0, 5);
  $chart['#mixed_axis_labels'][CHART_AXIS_Y_LEFT][1][] = chart_mixed_axis_label(t('Count'), 95);
  
  $chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][1][] = chart_mixed_axis_label(t('Mon'));
  $chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][1][] = chart_mixed_axis_label(t('Tue'));
  $chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][1][] = chart_mixed_axis_label(t('Wed'));
  $chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][1][] = chart_mixed_axis_label(t('Thu'));  
  $chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][1][] = chart_mixed_axis_label(t('Fri'));
  $chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][2][] = chart_mixed_axis_label(t('Days of the week'), 50);

  echo chart_render($chart);

Grid lines and chart fill

  $chart = array(
      '#chart_id' => 'test_chart',
      '#title' => chart_title(t('Servings'), 'cc0000', 15),
      '#type' => CHART_TYPE_LINE,
      '#size' => chart_size(400, 200),
      '#chart_fill' => chart_fill('c', 'eeeeee'),          
      '#grid_lines' => chart_grid_lines(20, 20, 1, 5),          
    );
    
  for ($i = 0; $i < 80; $i++){
    $chart['#data'][] = $i + rand(0, $i);
  }

  echo chart_render($chart);

Bar sizing & color mapping

Spacing and sizing of bars can be adjusted using the #bar_size attribute. Colors are mapped to content id's with chart_unique_color(id), no matter how many charts on the page use test_a, test_b, or test_c, they will always have the same corrosponding color.

  $chart = array(
      '#chart_id' => 'test_chart',
      '#title' => chart_title(t('Bar Chart'), '0000ee', 15),
      '#type' => CHART_TYPE_BAR_V_GROUPED,
      '#size' => chart_size(400, 200),
      '#grid_lines' => chart_grid_lines(30, 15),
      '#bar_size' => chart_bar_size(15, 5), 
    );
    
  $chart['#data'][] = array(40, 50, 70);
  $chart['#data'][] = array(60, 50, 30);
  $chart['#data'][] = array(40, 60, 20);
  
  $chart['#data_colors'][] = chart_unique_color('test_a');
  $chart['#data_colors'][] = chart_unique_color('test_b');
  $chart['#data_colors'][] = chart_unique_color('test_c');

  echo chart_render($chart);