1import { NumException } from "../../errors/NumException";
 2import { SheetColumnRowKey } from "../../models/common/SheetColumnRowKey";
 3import { Complex } from "../../models/common/Types";
 4import { Converters } from "../../utils/Converters";
 5import { AbstractFormula } from "../AbstractFormula";
 6import { FormulaName } from "../FormulaName";
 7
 8export class LN extends AbstractFormula {
 9  static SELF: LN = new LN();
10  NAME = FormulaName.LN;
11
12  internal(origin: SheetColumnRowKey, ...values: Array<Complex>) {
13    AbstractFormula.checkLength(values.length, 1, this.NAME);
14    const value = Converters.toNumber(Converters.first(this.collateralLookup(origin, values[0])));
15    if (value <= 0) {
16      return new NumException(`LN parameter 1 value is ${value}. It should be greater than 0.`);
17    }
18    return Math.log(value);
19  }
20}