frm_graph_data

This example will add a row of data to a graph. Replace 'My graph' with your graph title. Please note that you must include the title parameter in your graph shortcode.

add_filter('frm_graph_data', 'my_custom_graph_data', 10, 2);
function my_custom_graph_data( $data, $atts ) {
    if ( isset( $atts['title'] ) && $atts['title'] == 'My graph' ) {
        $data[] = array( 'X-axis label', 10, 20, 30 );
    }
    return $data;
}

Change the x-axis labels in your graph. Change First Label, Second Label, and Third Label to your new x-axis graph labels. Replace 'My graph' with your graph title. Please note that you must include the title parameter in your graph shortcode.

add_filter( 'frm_graph_data', 'change_my_graph_labels', 10, 2 );
function change_my_graph_labels( $data, $atts ) {
	if ( isset( $atts['title'] ) && $atts['title'] == 'My graph' ) {
		$new_labels = array( 'First label', 'Second label', 'Third label' );

		foreach ( $new_labels as $key => $label ) {
			$row_key = $key + 1;
			if ( isset( $data[ $row_key ] ) ) {
				$data[ $row_key ][0] = $label;
			}
		}
	}
	return $data;
}

Use the code below to change the format for dates on the x-axis of a graph. Replace 'created_at' with the value or date field you are setting for your x-axis. Replace 'F d' with the format you would like to use. You may use any of the date formats described here.

add_filter('frm_graph_data', 'change_my_graph_date_format', 10, 2);
function change_my_graph_date_format( $data, $atts ) {
	if ( isset( $atts['x_axis'] ) && $atts['x_axis'] == 'created_at' ) {
		$wp_date_format = get_option('date_format');
		$new_format = 'F d';

		for ( $i = 1, $l = count( $data ); $i<$l; $i++ ) {
			$date = $data[ $i ][0];
			$date = DateTime::createFromFormat( $wp_date_format, $date );
			$data[ $i ][0] = $date->format( $new_format );
		}
	}
	return $data;
}

Use the code below to convert a line graph of numbers to a cumulative graph. In order for this code to work, your graph shortcode must be graphing one field and an x_axis parameter must be set. It must also include data_type="total" and title="Your title". You can add the code below to the Code Snippets plugin or a child theme's functions.php file. Replace 'Cumulative graph' with the title you have given your graph.

add_filter('frm_graph_data', 'generate_cumulative_graph', 10, 2);
function generate_cumulative_graph( $data, $atts ) {
	if ( isset( $atts['title'] ) && $atts['title'] == 'Cumulative graph' ) {

		for ( $i=2, $l=count($data); $i<$l; $i++ ) {
			$data[ $i ][1]+= $data[ $i-1 ][1];
		}
	}
	return $data;
}