Polynomial Regression vs Think in Numbers

Polynomial Regression is your calculator and, more importantly, learning tool. You will be able to: * Construct polynomials of up to 20 degrees from either real or complex roots. * Interpolate polynomials from points by Lagrange, Newton or Vandermonde methods and Quadratic or Cubic splines. * Perform Least Squares approximation by orthogonal projection, with or without QR factorization, or partial derivatives. * Learn about each of the algorithms with derivations, proofs, step by step demonstrations, and visual tools. * Have an option to enter data by either typing or tapping on XY plane, and save data sets between program runs.

Make numbers second nature with a little practice every day. Think in Numbers is a focused mental arithmetic game, with no ads and no account. CLASSIC STAYS FREE Every original feature stays free: unlimited addition, subtraction, multiplication, division and mixed play; Easy, Medium, Hard and Extreme difficulties; three answer choices; score and streak bonuses; best scores, accuracy and elapsed time; pause, saved games and result sharing. Your existing scores and preferences carry forward. GROW WITH NUMBERS PLUS An optional auto-renewing subscription adds: • Eight practice areas: the four core operations, percentages, fractions, negative numbers and missing-number equations. • A fresh ten-question daily workout, daily streaks and a 30-day archive. • Smart practice that focuses on less-practiced or weaker skills and adjusts difficulty as you answer. • A 60-second sprint to challenge your own pace. • Custom workouts with your chosen skills, difficulty, question count and multiplication tables from 1 to 20. • Clear answer explanations and a personal mistake-review queue. • Accuracy charts, skill summaries, daily goals, milestones and recent workout history. • CSV progress export and Ocean, Rose, Forest and Sunset training themes. Practice and progress are stored on your device. Classic and training questions work offline; an internet connection is needed to purchase or restore subscriptions through Apple. No login, analytics, ads or AI provider is required. Both monthly and yearly Numbers Plus plans unlock the same features. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage or cancel in Apple Account settings. Restore Purchases is available in the app. Classic stays free if you cancel. Privacy: https://oanarinaldi.com/thinkinnumbersprivacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/