In Plotly, you can use the plotly_selected event to access the currently lassoed or selected points in JavaScript. The plotly_selected event is triggered when the user selects or lassoes data points on the plot, and it provides information about the selected data.

Here's how you can access the currently lassoed or selected points in Plotly:

  1. Add Event Listener: First, add an event listener for the plotly_selected event on your Plotly graph. You can do this using the on method provided by Plotly.
javascript
// Assuming you have a Plotly graph with the id 'myGraph' var graph = document.getElementById('myGraph'); graph.on('plotly_selected', handleSelectedPoints);
  1. Handle Selected Points: Define the handleSelectedPoints function to process the selected points. The event object passed to this function will contain information about the selected points.
javascript
function handleSelectedPoints(event) { var selectedPoints = event.points; console.log('Selected Points:', selectedPoints); // You can now use the selectedPoints array to access the selected data points. // For example, if you want to get the x and y values of the selected points: var xValues = selectedPoints.map((point) => point.x); var yValues = selectedPoints.map((point) => point.y); console.log('X Values of Selected Points:', xValues); console.log('Y Values of Selected Points:', yValues); // Perform any other operations you need with the selected data points. }

The event.points array will contain information about the selected data points, including their x and y values, and any other properties associated with those points.

By using the plotly_selected event and the event.points array, you can access the currently lassoed or selected points in Plotly and perform further actions or analysis on the selected data as needed.

Have questions or queries?
Get in Touch