A chart can simplify a complex subject while hiding a unit, date or missing observation. Charts Haven makes these details part of the learning experience.
Six chapters lead from asking a question to writing a reproducible note. Original examples let you check every calculation. No account is needed to practise.
Charts Haven publishes accessible educational material for curious beginners. The language editions share the same programme and worked examples.
Sources & review
Original Charts Haven example. All stated numbers are illustrative and allow you to repeat the calculation.