使用JavaScript在数组外部添加值

Question

I want to add the values from an array after subtracting another constant value and then squaring each value. I have tried the reduce method on the values, but I get an error. Here is the for loop I need to use:

 var dataset_1 = [1, 2, 3];
 var count_1 = dataset_1.length;
 var sum_1 = dataset_1.reduce(function(a,b){
 return a + b;
 }, 0  );
 var mean_1 = sum_1 / count_1;

 for(i = 0; i < count_1; i++){

  var stat_sq = Math.pow(dataset_1[i] - mean_1, 2);


  }

I need to add the values from the result of stat_sq, but the reduce method gives me this error, TypeError: stat_sq.reduce is not a function. I think I need to somehow get the values back into an array, but I don't know how.

Answer 1

In line 2 dataset variable is not defined. You call it dataset_1.