Struct VarSample 

pub struct VarSample;

Estimates sample variance using n-1 in the denominator.

VAR.S is the squared counterpart of STDEV.S for sample-based variability.

Remarks

• Requires at least two numeric values.
• Returns #DIV/0! when fewer than two numeric values are provided.
• Non-numeric values in referenced ranges are ignored.

Examples

title: "Sample variance from scalar arguments"
formula: "=VAR.S(2,4,6)"
expected: 4

title: "Sample variance from a range"
grid:
  A1: 1
  A2: 2
  A3: 3
formula: "=VAR.S(A1:A3)"
expected: 1

related:
  - VAR.P
  - STDEV.S
  - STDEV.P
faq:
  - q: "Why does VAR.S return #DIV/0!?"
    a: "Sample variance requires at least two numeric observations."

Trait Implementations

impl Debug for VarSample

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Function for VarSample

[formualizer-docgen:schema:start] Name: VAR.S Type: VarSample Min args: 1 Max args: variadic Variadic: true Signature: VAR.S(arg1…: number@range) Arg schema: arg1{kinds=number,required=true,shape=range,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false} Caps: PURE, REDUCTION, NUMERIC_ONLY, STREAM_OK [formualizer-docgen:schema:end]

fn caps(&self) -> FnCaps

Capability flags for this function

fn name(&self) -> &'static str

fn aliases(&self) -> &'static [&'static str]

Optional list of additional alias names (case-insensitive) that should resolve to this function. Default: empty slice. Implementors can override to expose legacy names. Returned slice must have ’static lifetime (typically a static array reference).

fn min_args(&self) -> usize

fn variadic(&self) -> bool

fn arg_schema(&self) -> &'static [ArgSchema]

fn eval<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

The unified evaluation path.

fn namespace(&self) -> &'static str

fn volatile(&self) -> bool

fn function_salt(&self) -> u64

fn eval_reference<'a, 'b, 'c>( &self, _args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Option<Result<ReferenceType, ExcelError>>

Optional reference result path. Only called by the interpreter/engine when the callsite expects a reference (e.g., range combinators, by-ref argument positions, or spill sources).

fn dispatch<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

Dispatch to the unified evaluation path with automatic argument validation.