Tutorial for boxcox transformation

hpolmann · Post by **hpolmann** » Mon Sep 11, 2023 6:10 pm

I would like to know if there is a tutorial to perform boxcox transformation. I have tried but I was not successful

MAgojam · Post by **MAgojam** » Mon Sep 11, 2023 9:00 pm

Hey @hpolmann,
you are probably using an outdated version of jamovi.
Here you will find a bug report (probably what is happening to you) related to the use of BOXCOX():
viewtopic.php?p=7907#p7907

The bug was fixed about a month ago.
In the screenshot I attach you can see that it does its job correctly.

: ScreenShot_20230911223707.jpeg (214.5 KiB) Viewed 7380 times

Cheers,
Maurizio
https://www.jamovi.org/about.html

hpolmann · Post by **hpolmann** » Wed Sep 13, 2023 12:50 pm

Thank you so much for yout attention.
I installed the currect version (2.4.8 ) and tried to follow your steps.
however nothing happenned, the column gets empty:

hpolmann · Post by **hpolmann** » Wed Sep 13, 2023 1:01 pm

MAgojam · Post by **MAgojam** » Wed Sep 13, 2023 9:02 pm

Hey @hpolmann,
Is it possible for you to attach the file to take a look at it so you can understand what's going on
Here you can see the sources of jamovi's BOXCOX function (Python code):
https://github.com/jamovi/jamovi/blob/c ... #L295-L312

I am attaching a .omv file with a single variable that is transformed with native BOXCOX() and also transformed with a (bare bones) function myboxcox() that I wrote on the fly in the Rj+ editor.

Rj_BOXCOX_Transform.omv: (4.03 KiB) Downloaded 236 times

Cheers,
Maurizio
https://www.jamovi.org/about.html

jamovi