توضیح 1
Time series: daily visits for two weeks.
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درس 3 از 12
Recognize when data describes change through time, a snapshot across units, or a panel-style combination.
Theory
Time series data tracks a variable through ordered periods, so date order and periodicity matter. Cross-sectional data compares many units at a single time or period. A panel-style data set follows several units through time, which combines both ideas.
توضیح 1
Time series: daily visits for two weeks.
توضیح 2
Cross-sectional: learner snapshot by province and device.
توضیح 3
Panel preview: repeated learner rows across several dates.
فعالیت تعاملی
Periodicity matters because the order of dates carries meaning.
ارتباط با R
Use a line chart for dates and a bar chart for a cross-sectional category.
Live R Lab
Compare a daily time series with a cross-sectional learner snapshot using clear plots.
Ready to run
مثال حلشده
سناریو
A manager asks whether site traffic is improving and which devices learners use. The first question needs a time-ordered trend; the second needs a snapshot comparison.
Chart choice follows data shape.
دستیار
Help me decide whether an example is time series, cross-sectional, or panel-style, and ask me one question at a time.
ارزیابی پایانی