Get list of data points in the canvas after zoom jqplot

Question

I really appreciate if someone can help me out on this. We are using Jqplot to plot some statistical data and like the zooming functionality.

Specifically we want t

Answer 1

Ok, so after a lot of digging through the code, there is not really any simple way to get this data, but, there is a way.

In the solution below, I have a zoomChart jqPLot obj that acts as a zoom-proxy to my main jqPLot, called chart. Presumably, if you don't have a proxy, this should work just as well, as long as you bind to the right object.

What I'm doing is binding a custom function to the 'jqplotZoom' event, which is called after a zoom action has been completed.

    zoomChart.target.bind('jqplotZoom', function(ev, gridpos, datapos, plot, cursor){
        var plotData =  plot.series[0].data;
        for (var i=0; i< plotData.length; i++) {
            if(plotData[i][0] >= chart.axes.xaxis.min && plotData[i][0] <= chart.axes.xaxis.max ) {
                //this dataset from the original is within the zoomed region
                //You can save these datapoints in a new array
                //This new array will contain your zoom dataset
                //for ex: zoomDataset.push(plotData[i]);
            }
        }
    });

Does this make sense? Essentially, the chart.axes.xaxis contains the bounds of the zoomed area, and the plot.series[N].data is all your original data in the chart format.

Note that I used chart because I originally created var chart = $.jqplot("chartDiv", ...

You should use whatever variable name you gave your plot. Hope this helps!