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    📊 Data Analysis & Visualization

    10 tested tools2 playbooksFree or paid: clearly marked

    Roadmap · Question to chart

    1. 01

      Write the question you want the data to answer.

    2. 02

      Clean the file (dates, duplicates, empty rows).

    3. 03

      Use an AI assistant to suggest formulas, then check them by hand on a few rows.

    4. 04

      Build the chart in a visualisation tool and add the source.

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    Watch out: AI can produce confident but wrong numbers. Every figure you publish must be reproducible.