在两个数字范围之间缩放 [英] Scaling between two number ranges

问题描述

我记得在某个时候使用方程式来完成此操作–您如何使用Javascript做到这一点?

I remember using an equation to do this at some point – how do you do this in Javascript?

插入两个数字范围:

rangeX = 1 (through) 10;
rangeY = 300.77 (through) 559.22;

输入范围Y范围内的值:

Input a value in the rangeY scale:

inputY = 328.17;

转换为rangeX比例的比例值:

Convert to proportional value in rangeX scale:

outputX = 1.43;

推荐答案

使用百分比:

xMax = 10;
xMin = 1;

yMax = 559.22;
yMin = 300.77;

percent = (inputY - yMin) / (yMax - yMin);
outputX = percent * (xMax - xMin) + xMin;

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