Function getSymbols

packages/plugin-plot/src/plot-utils.ts:3–17

(expr: math.MathNode)

import * as math from 'mathjs'

export function getSymbols(expr: math.MathNode) {
  return expr
    .filter((node) => {
      if (node instanceof math.SymbolNode && node.isSymbolNode) {
        try {
          const e = node.evaluate()
          return !!e.units
        } catch {
          return node.name !== 'x'
        }
      }
      return false
    })
    .map((node: unknown) => (node as math.SymbolNode).name)
}

export function parseExpression(expression: string, get: (path: string) => any) {
  const parsed = math.parse(expression)