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Tryphon

36 Posts
Posted - 09/08/2016 :  7:57:50 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello,

I use successfully a two way ANOVA test on my worksheet (input data indexed).
Factor A : week of measurement (from week 1 to week 24)
Factor B : animal group (2 different groups of 10 animals)
Data : measurements on animals (weight for example)

Now I want to apply a post-test like a Bonferonni test. The algorithm seems to be confused because it does not understand that factor A is a time variable and it is out of context to compare all the combinations of weeks !!

I only need to compare the two groups for each week, that is to say I want to know the significance on week 24 comparing the two groups, on week 23 comparing the two groups, ..., on week 1 comparing the two groups (= 24 p-values to compute). GraphPad Prism understands this kind of situation.

How to perform this under Origin ?

Thank you.

Operating System: Windows 8.1
OriginPro 2015 64 bits Sr2

yuki_wu

896 Posts
Posted - 09/08/2016 :  10:50:03 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

I think you can go through this tutorial, and find the way to analysis whether there are any significant differences between the groups.
http://www.originlab.com/doc/Tutorials/ThreeWay-ANOVA#Comparing_Same_Level_Between_Different_Groups

Hope it helps.

Regards,
Yuki
OriginLab
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Tryphon

36 Posts
Posted - 09/09/2016 :  1:01:02 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thank you for the suggestion.

I do not have a factor C in my study which only needs ANOVA 2 way for repeated measures and I cannot find this option "comparing same level between different groups" in Origin for ANOVA 2 way.

For ANOVA 3 way, I will need to upgrade but I do not know what will happen to my big labtalk code. Moreover, I own only one license and I will need to transfer it to Origin 2016. This is not possible before the end of the animal protocol I follow.

Thanks.
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Tryphon

36 Posts
Posted - 09/10/2016 :  1:45:06 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Sorry, I misunderstood the ANOVA 2 way GUI. I have to check the interaction box to get what I asked.

Thank you.
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