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=PY( from sklearn.linear_model import LinearRegression import numpy as np df = xl("HistoricalData!A1:B100", headers=True); X = df[["Month"]].values; y = df["Sales"].values; model = LinearRegression().fit(X, y); prediction = model.predict([[13]]) # next month prediction[0] ) Result appears in the cell – 95, 103.2, whatever your model predicts. No need to export. Excel charts are decent but limited. Python’s seaborn creates publication-quality plots directly in the worksheet:

The xl() function pulls Excel ranges into a pandas DataFrame. After processing, Python returns the result – which can be a single value, a DataFrame (automatically spilled into cells), or a plot. 1. Rapid Data Cleaning (Seconds, Not Hours) Manually cleaning messy data is a nightmare. With pandas:

=PY( df = xl("SalesData!A1:F200000", headers=True); summary = df.groupby(["Year", "Region"]).agg( Total_Sales = ("Amount", "sum"), Avg_Order = ("Amount", "mean"), Transaction_Count = ("OrderID", "nunique") ).reset_index(); summary ) You get a compact aggregated table ready for reporting. Need to run a regression or forecast next quarter? Scikit-learn and statsmodels work inside Excel:

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