LINESTGiven partial data about a linear trend, calculates various parameters about the ideal linear trend using the least-squares method.

Sample Usage

LINEST(B2:B10, A2:A10)

LINEST(B2:B10, A2:A10, FALSE, TRUE)

Syntax

LINEST(known_data_y, [known_data_x], [calculate_b], [verbose])

known_data_y – The array or range containing dependent (y) values that are already known, used to curve fit an ideal linear trend.

If known_data_y is a two-dimensional array or range, known_data_x must have the same dimensions or be omitted.

If known_data_y is a one-dimensional array or range, known_data_x may represent multiple independent variables in a two-dimensional array or range. I.e. if known_data_y is a single row, each row in known_data_x is interpreted as a separated independent value, and analogously if known_data_y is a single column.

known_data_x – [ OPTIONAL – {1,2,3,…} with same length as known_data_y by default ] – The values of the independent variable(s) corresponding with known_data_y.

If known_data_y is a one-dimensional array or range, known_data_x may represent multiple independent variables in a two-dimensional array or range. I.e. if known_data_y is a single row, each row in known_data_x is interpreted as a separated independent value, and analogously if known_data_y is a single column.

calculate_b – [ OPTIONAL – TRUE by default ] – Given a linear form of y = m*x+b, calculates the y-intercept (b) if TRUE. Otherwise, forces b to be 0 and only calculates the m values if FALSE, i.e. forces the curve fit to pass through the origin.

verbose – [ OPTIONAL – FALSE by default ] – A flag specifying whether to return additional regression statistics or only the linear coefficients and the y-intercept (default).

If verbose is TRUE, in addition to the set of linear coefficients for each independent variable and the y-intercept, LINEST returns

The standard error for each coefficient and the intercept,

The coefficient of determination (between 0 and 1, where 1 indicates perfect correlation),

Standard error for the dependent variable values,

The F statistic, or F-observed value indicating whether the observed relationship between dependent and independent variables is random rather than linear,

The degrees of freedom, useful in looking up F statistic values in a reference table to estimate a confidence level,

The regression sum of squares, and

The residual sum of squares.

See Also

TREND: Given partial data about a linear trend, fits an ideal linear trend using the least squares method and/or predicts further values.

LOGEST: Given partial data about an exponential growth curve, calculates various parameters about the best fit ideal exponential growth curve.

GROWTH: Given partial data about an exponential growth trend, fits an ideal exponential growth trend and/or predicts further values.

Examples