Implementing Basic Cross-Filtering Between Two Charts

Show how to synchronize two charts so that interacting with one (e.g., selecting a data range) updates the data displayed in the other.

// Assume we have two charts initialized, chart1 and chart2

// Function to redraw chart2 based on the selection made in chart1
function updateChart2BasedOnChart1(selectedData) {
    // Logic to update and redraw chart2
    // This could involve filtering dataset for chart2 based on selectedData from chart1
    // and then calling the update/redraw function of chart2
    chart2.update(selectedData); // Example call, assuming 'update' method exists
}

// Attach an event listener to chart1 for the 'selection' event
// Replace 'selection' with the actual event name based on your charting library
chart1.on('selection', function(event) {
    // event.selectedData contains the data selected by the user in chart1
    // Call the function to update chart2 based on the selection in chart1
    updateChart2BasedOnChart1(event.selectedData);
});

This code snippet demonstrates the basic setup for cross-filtering between two charts. When a user makes a selection in chart1 (e.g., selects a data range), the 'selection' event is triggered, and the corresponding data is passed to a function that updates chart2 based on the selected data in chart1. The actual implementation of the update logic in 'updateChart2BasedOnChart1' depends on the specific charting library and data structure you are using.