QlikView Reference Manual.pdf - QlikCommunity - QlikView

linest_df ([{set_expression}][ distinct ] [total [] ]
y-expression, x-expression [, y0 [, x0 ]] )
returns the aggregated degrees of freedom of a linear regression defined by the equation y=mx+b for a series
of coordinates represented by paired numbers in x-expression and y-expression iterated over the chart dimension(s).
Text values, null values and missing values in any or both pieces of a data-pair will result in the
entire data-pair to be disregarded.
An optional valye y0 may be stated forcing the regression line to pass through the y-axis at a given point.
By stating both y0 and x0 it is possible to force the regression line to pass through a single fixed coordinate.
Unless both y0 and x0 are stated, the function requires at least two valid data-pairs to calculate. If y0 and x0
are stated, a single data pair will do.
This function has the same limitations for nested aggregation as the avg([{set_expression}] [ distinct ] [
total []] expression) (page 774) function. The linest_df function supports Set Analysis (page
799) and the total qualifier in the same way as the avg([{set_expression}] [ distinct ] [ total []] expression) (page 774) function.
Examples:
linest_df( Y, X )
linest_df( A/B, X*Y/3 )
linest_df( total Y, X )
linest_df( total Y, X)
linest_df( Y, X, 0 )
linest_df( Y, X, 1, 1 )
linest_f ([{set_expression}][ distinct ] [ total [] ]
y-expression, x-expression [, y0 [, x0 ]] )
returns the aggregated F statistic (r2/(1-r2)) of a linear regression defined by the equation y=mx+b for a series
of coordinates represented by paired numbers in x-expression and y-expression iterated over the chart dimension(s).
Text values, null values and missing values in any or both pieces of a data-pair will result in the
entire data-pair to be disregarded.
An optional valye y0 may be stated forcing the regression line to pass through the y-axis at a given point.
By stating both y0 and x0 it is possible to force the regression line to pass through a single fixed coordinate.
Unless both y0 and x0 are stated, the function requires at least two valid data-pairs to calculate. If y0 and x0
are stated, a single data pair will do.
This function has the same limitations for nested aggregation as the avg([{set_expression}] [ distinct ] [
total []] expression) (page 774) function. The linest_f function supports Set Analysis (page
799) and the total qualifier in the same way as the avg([{set_expression}] [ distinct ] [ total []] expression) (page 774) function.
Examples:
linest_f( Y, X )
linest_f( A/B, X*Y/3 )
linest_f( total Y, X )
linest_f( total Y, X)
linest_f( Y, X, 0 )
linest_f( Y, X, 1, 1 )
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