Struct SlopeFn 

pub struct SlopeFn;

Returns the slope of the linear regression line for paired data.

SLOPE fits y = m*x + b and returns m, the rate of change in y per unit of x.

Remarks

• known_y and known_x must have the same numeric length.
• Returns #N/A for mismatched lengths.
• Returns #DIV/0! if all x values are identical.

Examples

title: "Positive slope from direct arrays"
formula: "=SLOPE({2,4,6},{1,2,3})"
expected: 2

title: "Negative slope from ranges"
grid:
  A1: 10
  A2: 8
  A3: 6
  B1: 1
  B2: 2
  B3: 3
formula: "=SLOPE(A1:A3,B1:B3)"
expected: -2

Trait Implementations

impl Debug for SlopeFn

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

Formats the value using the given formatter.

impl Function for SlopeFn

[formualizer-docgen:schema:start] Name: SLOPE Type: SlopeFn Min args: 2 Max args: 1 Variadic: false Signature: SLOPE(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 [formualizer-docgen:schema:end]

fn caps(&self) -> FnCaps

Capability flags for this function

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

fn min_args(&self) -> usize

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 variadic(&self) -> bool

fn volatile(&self) -> bool

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 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.