Examples

Keep the penguins with a recorded body mass, and add the mass in kilograms and a size label.

Count the penguins and find the mean and largest body mass for each species, with some masses missing.

Add airport names and altitudes to hourly weather readings from the nycflights13 tables.

Count penguins per species with one column per study year, then stack the years into rows.

Translate an R analysis that cleans, reshapes, and models data.

Short analyses that combine data pipelines with model fits.

Summarize the Palmer penguins by species with several expressions in one grouped aggregation.

Count late departures from each New York City airport in the 33 MB nycflights13 flights file with a lazy query plan.

Match JFK departures to the latest weather reading and a 3-hour rolling mean of temperature.

Reads mtcars by URL in a JupyterLab notebook, summarizes fuel economy by cylinder count, and plots it against weight.

Estimate fuel economy from weight and cylinders in mtcars and predict new cars with intervals.

Model labor-force participation in mroz and insurance claim rates with an exposure offset.

Give each sleepstudy subject its own intercept and read how much subjects vary.

Evaluate the normal and Student's t distributions and draw reproducible samples.

Read sleepstudy with Polars, fit subject intercepts, and chart one fitted line per subject.

See how fits handle incomplete rows and report the rows they used.

Adds a fitted line to a scatterplot and explains what its confidence band covers.

Draws one panel per group and explains shared and free axis scales.

Writes one chart as an interactive HTML page and as static SVG and PNG images.

Link several charts to the filters of one Livewire component.

Browse charts by type, from distributions and heatmaps to linked brushing.

Estimates the effect of SAT coaching in eight schools from Rubin's published data with a hierarchical model, and checks that the chains converged.

Fit the example models that ship with CmdStanPHP.