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Release Notes

LOGEST

This function calculates an exponential curve that fits the data and returns an array of values that describes the curve.

Syntax

LOGEST(y, [x], [constant], [stats])

Arguments

The equation for the curve is y=b*m^x or y=(b*(m1^x1)*(m2^x2)*_).

This function has these arguments:

Argument	Description
y	[Required] Set of y values that are known in the relationship y=b*m^x
x	[Optional] X is an optional set of x values that may be known in the relationship y=mx+b
constant	[Optional] Logical value that specifies whether to force the constant b to equal 0. If true or omitted then b is calculated normally; if false then b is equal to 0 and the m values are adjusted so that y=m^x.
stats	[Optional] Logical value that specifies whether to return additional regression statistics. If true, then the additional regression statistics are returned if false or omitted then only the m-coefficients and b are returned.

If x is omitted then x defaults to the array {1,2,3...}, which has the same dimensions as y.

Remarks

Use the INDEX function to get individual elements from the returned array.

Examples

LOGEST(A2:A7,C2:C7,TRUE,FALSE)