struct

Crysda::DataCol

Inherits Struct / Value / Object

Constructors

new(name : String)
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Instance methods

*(val : Number)
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*(val : DataCol)
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+(val : Number)
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+(val : DataCol)
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+(val : Iterable)
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+(val : String)
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-(val : Number)
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-(val : DataCol)
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-
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/(val : Number)
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/(val : DataCol)
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<(val : Any | DataCol)
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<=(val : Any | DataCol)
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==(i : Any)
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==(other : self)
>(val : Any | DataCol)
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>=(val : Any | DataCol)
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[](*args, **options)
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[](*args, **options, &)
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[]?(*args, **options)
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[]?(*args, **options, &)
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apply

Apply a function to each non-null value

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as_b
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as_f64
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as_i
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as_i64
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as_s
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between(min_val, max_val) : Array(Bool)

Check if numeric values are between min and max (inclusive)

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bfill

Backward fill nulls (propagate next valid value)

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clip(min_val, max_val) : DataCol

Clip values to a range

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clip_lower(min_val) : DataCol

Clip values to minimum

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clip_upper(max_val) : DataCol

Clip values to maximum

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coalesce(other : DataCol) : DataCol

Column-level coalesce - return first non-null from self or other

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compare(left : Int32, right : Int32, null_last = true) : Int32
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cumsum
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cut(bins : Array(Number), labels : Array(String) | Nil = nil, right : Bool = true) : StringCol

Bin values into discrete intervals (like pandas cut) bins: Array of bin edges (must be sorted ascending) labels: Optional labels for each bin (size must be bins.size - 1) right: If true (default), bins are (left, right], otherwise [left, right)

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desc
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div(val)
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equals(other : self)
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ffill

Forward fill nulls (propagate last valid value)

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first

Get first non-null value from column

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has_nulls?
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hash(hasher)

See Object#hash(hasher)

in?(set : Array) : Array(Bool)

Check if values are in a given set

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is_in(set : Array) : Array(Bool)

Check if values are in a given set (alias)

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is_na
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is_not_na
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lag(n = 1, default : Any = nil)
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last

Get last non-null value from column

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lead(n = 1, default : Any = nil)
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map
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matching(missing_as = false, &) : Array(Bool)
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max(remove_na = false)
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mean(remove_na = false)
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median(remove_na = false)
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min(remove_na = false)
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minus(val)
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name
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nunique

Count of unique values

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order(na_last = true)
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pct_change
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plus(val)
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qcut(q : Int32, labels : Array(String) | Nil = nil) : StringCol

Quantile-based binning (like pandas qcut) q: Number of quantiles (e.g., 4 for quartiles, 10 for deciles) labels: Optional labels for each bin

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rank(na_last = true)
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sd(remove_na = false)
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size(*args, **options)
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size(*args, **options, &)
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str_contains(pattern : String | Regex, case_sensitive : Bool = true) : Array(Bool)

Check if strings contain a pattern

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str_downcase

Convert strings to lowercase

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str_ends_with(suffix : String, case_sensitive : Bool = true) : Array(Bool)

Check if strings end with suffix

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str_extract(pattern : Regex) : StringCol

Extract regex pattern from strings

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str_len

Get string lengths

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str_replace(pattern : String | Regex, replacement : String) : StringCol

Replace pattern in strings

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str_slice(start : Int32, length : Int32 | Nil = nil) : StringCol

Substring extraction

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str_starts_with(prefix : String, case_sensitive : Bool = true) : Array(Bool)

Check if strings start with prefix

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str_strip

Strip whitespace from strings

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str_upcase

Convert strings to uppercase

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sum(remove_na = false)
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times(val)
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to_s(io : IO) : Nil

Same as #inspect(io).

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to_s

Returns a nicely readable and concise string representation of this object, typically intended for users.

This method should usually not be overridden. It delegates to #to_s(IO) which can be overridden for custom implementations.

Also see #inspect.

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unique

Get unique values in the column

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values
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