Dataframe

Command	Description
polars	Operate with data in a dataframe format.
polars agg-groups	Creates an agg_groups expression.
polars all-false	Returns true if all values are false.
polars all-true	Returns true if all values are true.
polars append	Appends a new dataframe.
polars arg-max	Return index for max value in series.
polars arg-min	Return index for min value in series.
polars arg-sort	Returns indexes for a sorted series.
polars arg-true	Returns indexes where values are true.
polars arg-unique	Returns indexes for unique values.
polars as-date	Converts string to date.
polars as-datetime	Converts string to datetime.
polars cache	Caches operations in a new LazyFrame.
polars cast	Cast a column to a different dtype.
polars columns	Show dataframe columns.
polars concat	Concatenate two or more dataframes.
polars contains	Checks if a pattern is contained in a string.
polars count	Returns the number of non-null values in the column.
polars count-null	Counts null values.
polars cumulative	Cumulative calculation for a column or series.
polars decimal	Converts a string column into a decimal column
polars drop	Creates a new dataframe by dropping the selected columns.
polars drop-duplicates	Drops duplicate values in dataframe.
polars drop-nulls	Drops null values in dataframe.
polars dummies	Creates a new dataframe with dummy variables.
polars expr-not	Creates a not expression.
polars filter-with	Filters dataframe using a mask or expression as reference.
polars first	Show only the first number of rows or create a first expression
polars get	Creates dataframe with the selected columns.
polars get-day	Gets day from date.
polars get-hour	Gets hour from date.
polars get-minute	Gets minute from date.
polars get-month	Gets month from date.
polars get-nanosecond	Gets nanosecond from date.
polars get-ordinal	Gets ordinal from date.
polars get-second	Gets second from date.
polars get-week	Gets week from date.
polars get-weekday	Gets weekday from date.
polars get-year	Gets year from date.
polars implode	Aggregates values into a list.
polars integer	Converts a string column into a integer column
polars into-df	Converts a list, table or record into a dataframe.
polars into-nu	Converts a dataframe or an expression into nushell value for access and exploration.
polars is-duplicated	Creates mask indicating duplicated values.
polars is-not-null	Creates mask where value is not null.
polars is-null	Creates mask where value is null.
polars is-unique	Creates mask indicating unique values.
polars last	Creates new dataframe with tail rows or creates a last expression.
polars lowercase	Lowercase the strings in the column.
polars max	Creates a max expression or aggregates columns to their max value.
polars mean	Creates a mean expression for an aggregation or aggregates columns to their mean value.
polars min	Creates a min expression or aggregates columns to their min value.
polars n-unique	Counts unique values.
polars not	Inverts boolean mask.
polars open	Opens CSV, JSON, NDJSON/JSON lines, arrow, avro, or parquet file to create dataframe. A lazy dataframe will be created by default, if supported.
polars pivot	Pivot a DataFrame from wide to long format.
polars profile	Profile a lazy dataframe. This will run the query and return a record containing the materialized DataFrame and a DataFrame that contains profiling information of each node that is executed. The units of the timings are microseconds.
polars query	Query dataframe using SQL. Note: The dataframe is always named 'df' in your query's from clause.
polars rename	Rename a dataframe column.
polars replace	Replace the leftmost (sub)string by a regex pattern.
polars replace-all	Replace all (sub)strings by a regex pattern.
polars reverse	Reverses the LazyFrame
polars rolling	Rolling calculation for a series.
polars sample	Create sample dataframe.
polars schema	Show schema for a dataframe.
polars set	Sets value where given mask is true.
polars set-with-idx	Sets value in the given index.
polars shape	Shows column and row size for a dataframe.
polars shift	Shifts the values by a given period.
polars slice	Creates new dataframe from a slice of rows.
polars std	Creates a std expression for an aggregation of std value from columns in a dataframe.
polars store-get	Gets a Dataframe or other object from the plugin cache.
polars store-ls	Lists stored polars objects.
polars store-rm	Removes a stored Dataframe or other object from the plugin cache.
polars str-join	Concatenates strings within a column or dataframes
polars str-lengths	Get lengths of all strings.
polars str-slice	Slices the string from the start position until the selected length.
polars strftime	Formats date based on string rule.
polars sum	Creates a sum expression for an aggregation or aggregates columns to their sum value.
polars summary	For a dataframe, produces descriptive statistics (summary statistics) for its numeric columns.
polars take	Creates new dataframe using the given indices.
polars unique	Returns unique values from a dataframe.
polars unpivot	Unpivot a DataFrame from wide to long format.
polars uppercase	Uppercase the strings in the column.
polars value-counts	Returns a dataframe with the counts for unique values in series.
polars var	Create a var expression for an aggregation.
polars with-column	Adds a series to the dataframe.