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Jul 22, 2013 3:51 AM
(1042 views)

I'm trying to calculate a moving average for a data-set containing several rounds of the continuous data. That is, I want a calculated average for every data-point, including the first and last. The average should be 7 steps in either direction, except for either end, where non-existing data beyond the 7 step window should simply ignored. Of course I don't want data form different By-Groups to be included in the same average. I was hoping to use the "Col Mean" function, but I can't figure out how to make the average "move". Any suggestions?

BR

Jesper

Jesper

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Solution

Hi Jesper,

You can use the Summation function with an If() condition to do this.

Here's a picture of what it would look like in the formula editor.

And here's the text version:

Summation(

i = Row() - 7,

Row() + 7,

If( :DAY* == :DAY*

:DIAMETER*,*

.

)

) / Summation( i = Row() - 7, Row() + 7, If( :DAY* == :DAY, 1, . ) )*

Hope that helps.

-Jeff

-Jeff

4 REPLIES

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Jul 22, 2013 4:11 AM
(783 views)

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Jul 22, 2013 4:33 AM
(783 views)

I do have access to EST, but I have never used it. I was hoping to do it directly in the formula editor.

BR

Jesper

Jesper

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Hi Jesper,

You can use the Summation function with an If() condition to do this.

Here's a picture of what it would look like in the formula editor.

And here's the text version:

Summation(

i = Row() - 7,

Row() + 7,

If( :DAY* == :DAY*

:DIAMETER*,*

.

)

) / Summation( i = Row() - 7, Row() + 7, If( :DAY* == :DAY, 1, . ) )*

Hope that helps.

-Jeff

-Jeff

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Jul 22, 2013 10:53 PM
(783 views)