react-native-chart-kit/dist/v2/core/scales/linear.js

Beautiful React Native charts for dashboards, reports, and data-rich mobile apps.

import { resolveNumericDomain } from "./domain";
export const createLinearScale = ({ domain = "auto", values = [], range }) => {
    const resolvedDomain = resolveNumericDomain(values, domain);
    const domainSpan = resolvedDomain[1] - resolvedDomain[0];
    const rangeSpan = range[1] - range[0];
    return {
        domain: resolvedDomain,
        range,
        scale: (value) => {
            if (domainSpan === 0) {
                return range[0];
            }
            return range[0] + ((value - resolvedDomain[0]) / domainSpan) * rangeSpan;
        },
        invert: (value) => {
            if (rangeSpan === 0) {
                return resolvedDomain[0];
            }
            return resolvedDomain[0] + ((value - range[0]) / rangeSpan) * domainSpan;
        }
    };
};