import { Pipe, PipeTransform } from '@angular/core'; @Pipe({ name: 'arctangantquotient' }) export class ArctangantquotientPipe implements PipeTransform { transform(input: any, quotient: any): number { var convert = (typeof input === 'string') ? Number(input) : input; var convertSecond = (typeof quotient === 'string') ? Number(quotient) : quotient; return Math.atan2(convert,convertSecond); } }