NBA 2014–15 Shot Logs · 33,362 Three-Point Shots

Model Builder

Explore what predicted 3-point shot makes in the 2014–15 NBA season. Test whether adding different shot conditions improves the model — or build one from scratch.

All six shot-condition variables are pre-selected. Add or remove them to see how model fit changes. Use the simulator at the bottom to test individual scenarios.

How to Use This Tool

Not sure where to start? All six shot-condition variables are pre-selected. Click Run Analysis at the bottom to see how the model performs, then add or remove variables to explore.

1. Pick an outcome

The outcome is 3-Point Shot Make — whether the shot went in (1 = made, 0 = missed). The case study uses this single outcome; all models predict it.

2. Pick predictors

Use the search box and category buttons to find shot-condition variables across Shot Mechanics, Shot Defense, and Game Context. All six published-model predictors are pre-checked as a starting point; add or remove any. Run Analysis is capped at 20 predictors; Auto-Build searches the full set and isn't capped.

3. Fit and read

Click Run Analysis to fit the model with whatever variables you've checked. Or use Auto-Build Standard to let the algorithm search all variables automatically, or Auto-Build Actionable Predictors to weight selection toward variables coaches and players can influence (shot distance, defender distance) over fixed game context (period, game margin).

Optional: player

By default, the model is fit on all 33,362 shots from the 2014–15 season. Optionally pick a single player using the Model shots for dropdown to fit on just their attempts — useful for asking "what predicts this shooter's makes?" Players with fewer than 100 attempts are hidden.

After you run — what to expect

Review results

Results show how well the model predicts shot makes and how much each condition contributes. The Other Conditions in This Data section lists every variable not yet in your model — each card shows whether adding it would likely improve fit.

Use the simulator

Click Launch in the Simulator panel to open an interactive tool. Set any combination of shot conditions — e.g. Defender Distance "Tight" and Shot Clock "Late" — and watch the predicted make probability update instantly.

Iterate and compare

Each run is saved in the Saved Analyses tray. Click Load to restore a run, or Pin two runs to view them side by side. Each card shows Tjur R², AUC, and Brier — higher Tjur R² and AUC, lower Brier means a better-performing model.

If you ran with a synthetic variable, results show three sections:

Full Model

Complete model including all selected predictors and the synthetic variable.

Base Model

Model performance without the synthetic variable.

Synthetic Variable Performance

How well the synthetic met its specifications and its impact on model fit.

What are you trying to predict?

Choose the outcome your model will try to explain.

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Shot Conditions to Include in Your Model

The six highlighted variables are from the published three-point make rate model. Check or uncheck any, then scroll down to Run Analysis or Auto-Build.
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Outcome: …
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Advanced options — synthetic-variable vulnerability check (optional)

Vulnerability check. Inserts a synthetic predictor with a known relationship to the outcome. If the synthetic shows up as a significant predictor in the result, the model may be absorbing signal that doesn't really belong to your chosen variables — a sign it's vulnerable to omitted variables of similar strength.

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The model you're about to fit
Predictors (X)
No predictors selected yet. Check variable cards above or click Auto-Build below.
Outcome (Y)
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A logistic regression model uses the predictors on the left to estimate the probability of the outcome on the right. This summary updates as you change your selection — and shows exactly what gets submitted when you click Run Analysis. Auto-Build ignores this selection and chooses predictors for you.

Run Analysis

Build a model from exactly the predictors you've selected above. Full analyst control.

Returns: model fit, predictor strengths, calibration, and an interactive simulator.

Auto-Build

Ignores your selection above. Searches the full set of available predictors and picks the best subset for you. Actionable Predictors is selected by default — switch to Standard below if you prefer pure fit:

Finds the predictors that can actually be changed — useful for planning.

Returns: a chosen subset of predictors plus full model fit, strengths, and an interactive simulator.

Auto-Building Optimal Model… 0s

Section 1: Full Model Performance

Complete model including all predictor variables and the synthetic variable