Find the sum of individual data points in chart.js by taking into consideration their respective

I created a line chart using the Chart.js library. My goal is to calculate the weighted sum when hovering over a specific data point, based on the difference between that point and its neighboring points. For instance, if point[0] = 5 with weight 2, point[1] = 10 with weight 3, and point[2] with weight 4, upon hovering on point[2], I would like to display a calculation like: 

point[0]*2 + (point[1]-point[0])*3 + (point[2]-point[1])*4

Do you have any suggestions on how I can achieve this? I've been experimenting with loops and conditionals, but it doesn't seem to be the most efficient solution given the multiple indexes involved.

javascripttypescriptchart.js

Answer №1

If you're looking for a solution, consider the following:

 point[0]*2 + (point[1]-point[0])*3 + (point[2]-point[1])*4

This equation simplifies to:

4* point[2]- (point[0]+ point[1])

To calculate this for any given point i, you will need to evaluate (i+2)*point[i], and then subtract the sum from point[0] to point[n-1]. Remember that a loop is necessary to perform these calculations.

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