Stats

Represents basic descriptive statistics calculated for a Column. See samples: https://public.datagrok.ai/js/samples/data-frame/stats

Constructors

new Stats()

new Stats(dart): Stats

Parameters

Parameter	Type
dart	any

Returns

Stats

Source

src/dataframe.ts:1925

Properties

Property	Modifier	Type
dart	private	any

Accessors

avg

get avg(): number

Returns

number

• average

Source

src/dataframe.ts:1976

---

kurt

get kurt(): number

Returns

number

• kurtosis

Source

src/dataframe.ts:1996

---

max

get max(): number

Returns

number

• maximum

Source

src/dataframe.ts:1966

---

med

get med(): number

Returns

number

• median value

Source

src/dataframe.ts:2001

---

min

get min(): number

Returns

number

• minimum

Source

src/dataframe.ts:1961

---

missingValueCount

get missingValueCount(): number

Number of missing (empty) values.

Returns

number

Source

src/dataframe.ts:1946

---

q1

get q1(): number

Returns

number

• first quartile

Source

src/dataframe.ts:2006

---

q2

get q2(): number

Returns

number

• second quartile

Source

src/dataframe.ts:2011

---

q3

get q3(): number

Returns

number

• third quartile

Source

src/dataframe.ts:2016

---

skew

get skew(): number

Returns

number

• skewness

Source

src/dataframe.ts:1991

---

stdev

get stdev(): number

Returns

number

• standard deviation

Source

src/dataframe.ts:1981

---

sum

get sum(): number

Returns

number

• sum

Source

src/dataframe.ts:1971

---

totalCount

get totalCount(): number

Total number of values (including missing values).

Returns

number

Source

src/dataframe.ts:1941

---

uniqueCount

get uniqueCount(): number

Number of unique values.

Returns

number

Source

src/dataframe.ts:1951

---

valueCount

get valueCount(): number

Number of non-empty values.

Returns

number

Source

src/dataframe.ts:1956

---

variance

get variance(): number

Returns

number

• variance

Source

src/dataframe.ts:1986

Methods

corr()

corr(otherColumn): number

Pearson correlation between this column and another column.

Parameters

Parameter	Type
otherColumn	Column<any, any>

Returns

number

Source

src/dataframe.ts:2021

---

spearmanCorr()

spearmanCorr(otherColumn): number

Spearman correlation between this column and another column.

Parameters

Parameter	Type
otherColumn	Column<any, any>

Returns

number

Source

src/dataframe.ts:2024

---

toString()

toString(): string

Returns

string

Source

src/dataframe.ts:2032

---

fromColumn()

static fromColumn(col, mask): Stats

Calculates statistics for the specified column, optionally filtered by a mask.

Parameters

Parameter	Type	Default value	Description
col	Column<any, any>	undefined	-
mask	null | BitSet	null

Returns

Stats

Source

src/dataframe.ts:1931

---

fromValues()

static fromValues(values): Stats

Calculates statistics for the array of values.

Parameters

Parameter	Type
values	number[] | Int8Array | Int16Array | Int32Array | Float32Array | Float64Array

Returns

Stats

Source

src/dataframe.ts:1936

---

histogramsByCategories()

static histogramsByCategories(valueColumn, catColumn): Int32Array[]

Returns distributions of [valueColumn] for each category in [catColumn].

Parameters

Parameter	Type
valueColumn	Column<any, any>
catColumn	Column<any, any>

Returns

Int32Array[]

Source

src/dataframe.ts:2027