CODEWITHSUNDEEP
javascriptarrays
KonVas
KonVas

Reputation: 267

Normalise range of values of array without knowing min/max values

Is it possible to arrange the values of an array to have a range of 0.0 - 1.0. but without having to know the min and max values of the array in advance. Say I have this below.

Event:7.3339,5.20755,25343052,11.8282,-1,1,146511,-0.584812,1.41411,1.23406,-2.27636,6.23602,2.3905,2.06042,-1.55016,5.8858,-1.81976,-3.85836,4.62525

So in the future I want to make sure it will be normalized to the given range by finding the min/max values programatically.

Upvotes: 1

Views: 540

Answers (1)

Nina Scholz
Nina Scholz

Reputation: 386604

You could take the min and max values and for every value subtract the min value and divide by the delta of max and min.

toFixed is only for displaying the normalised values.

function getNormalized(array) {
    var min = Math.min(...array),
        max = Math.max(...array);

    return array.map(v => (v - min) / (max - min));
}

var array = [7.3339, 5.20755, 25343052, 11.8282, -1, 1, 146511, -0.584812, 1.41411, 1.23406, -2.27636, 6.23602, 2.3905, 2.06042, -1.55016, 5.8858, -1.81976, -3.85836, 4.62525];

console.log(getNormalized(array).map(v => v.toFixed(10)));
.as-console-wrapper { max-height: 100% !important; top: 0; }

Upvotes: 1

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