ParsingManualXRayPeaks.swift

import Foundation

let data = try! Data(contentsOf: URL(fileURLWithPath: "/Users/philipturner/Desktop/data.txt"))
print(data.count)

let inputString = String(data: data, encoding: .utf8)!
let inputLines = inputString.split(separator: "\n").map(String.init)
for line in inputLines {
  let fragments = line.split(separator: " ").map(String.init)
  guard fragments.count == 3 else {
    fatalError("Unexpected fragment count.")
  }
  
  let numbers = fragments.map { Double($0)! }
  let angle = numbers[0]
  let intensity = numbers[1]
  let FWHM = numbers[2]
  
  let leftX = angle - FWHM / 2
  let middleX = angle
  let rightX = angle + FWHM / 2
  let bottomY: Double = 0
  let topY: Double = intensity
  
  let reprLeftX = String(format: "%.2f", leftX)
  let reprMiddleX = String(format: "%.2f", middleX)
  let reprRightX = String(format: "%.2f", rightX)
  let reprBottomY = String(format: "%.2f", bottomY)
  let reprTopY = String(format: "%.2f", topY)
  
  print(reprLeftX + ", " + reprBottomY)
  print(reprLeftX + ", " + reprTopY)
  print(reprMiddleX + ", " + reprTopY)
  print(reprRightX + ", " + reprTopY)
  print(reprRightX + ", " + reprBottomY)
}