How to calculate the average value of javascript two-dimensional array

This article mainly introduces "how to calculate the average value of javascript two-dimensional array". In the daily operation, I believe many people have doubts about how to find the average value of javascript two-dimensional array. Xiaobian consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubt of "how to find the average value of javascript two-dimensional array". Next, please follow the editor to study!

JS two-dimensional array to calculate the average method: 1, nested double-layer for loop through all the elements of the two-dimensional array; 2, in the loop body, use the "sum+=arr1 [I] [j]" statement to add and sum all the array elements; 3, divide the sum of array elements by the number of array elements to get the average.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Average value of javascript two-dimensional array

To require the average of a two-dimensional array, we need to get each element in the two-dimensional array, add them up, and divide by the number of elements.

So how do you get every element of a two-dimensional array?

When you see this, you think of the for loop, which uses array subscripts to get elements. Because it is a two-dimensional array, two layers of for loops are used for nesting: the first layer controls the array row subscript and the second layer controls the array column subscript.

Ok, let's look at the implementation code:

Var sum=0;var Ball0; / / this variable is defined to record the total number of elements in the array var arr= [[12 beats 13, 14, 15], [16, 17, 18, 19], [20, 21, 22, 23]; for (var iPersoni.