topic Re: equivalent for excel SLOPE function in QlikView

equivalent for excel SLOPE function

lukas_sokol — Tue, 17 Nov 2015 12:51:27 GMT

Hi,

Is there any equivalent for Excel SLOPE function.

https://support.office.com/en-us/article/SLOPE-function-11fb8f97-3117-4813-98aa-61d7e01276b9

Regards

Łukasz

Re: equivalent for excel SLOPE function

swuehl — Tue, 17 Nov 2015 13:32:54 GMT

Look into the linest_m function:

linest_m ([{set_expression}][ distinct ] [total [<fld {,fld}>] ]y-expression, x-expression[, y0 [, x0 ]])

returns the aggregated m value (slope) 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 [<fld { , fld } >]] expression) function. The linest_m function supports Set Analysis and the total qualifier in the same way as the avg([{set_expression}] [ distinct ] [ total [<fld { , fld } >]] expression) function.

Examples:

linest_m( Y, X )

linest_m( A/B, X*Y/3 )

linest_m( total Y, X )

linest_m( total <Z> Y, X)

linest_m( Y, X, 0 )

linest_m( Y, X, 1, 1 )

Re: equivalent for excel SLOPE function

lukas_sokol — Tue, 17 Nov 2015 17:53:01 GMT

Thank you for the information and examples.
I have a question how to write an expression.

I have a measure "hits%", and I wanna determine the slope for 3 months.

For Example I have values 94.% 99% 99%, and months numbered 1,2,3.

In excel I get slope = 3%

Re: equivalent for excel SLOPE function

swuehl — Tue, 17 Nov 2015 17:59:11 GMT

LOAD * INLINE [

Month, Value

1,94%

2,99%

3,99%

];

In the frontend, create a text box with expression

=LINEST_M( Value, Month)

It returns 0.025, i.e. 2.5% which seems reasonable to me.

Re: equivalent for excel SLOPE function

lukas_sokol — Wed, 18 Nov 2015 10:11:55 GMT

Thank you for your help.

I have one small problem.

I have a lot of "values" for various periods.

I want to count linest_m for 3 months back

i try to use

LINEST_M( sum({<Month={'>=$(=only(Month)-2)<=$(=only(Month))'}>}hits) , Month)

LINEST_M( sum(aggr(rangesum(above(total sum({<Month=>}hits),0,3)),Month)), Month)

but it's doesn't work