Hi Deb,
Good to hear you have discovered the PAST package. Perhaps you are not correctly assigning your groups? Did you download the latest version or the older version (which is still available on the website)? I'm asking, because there is a difference in assigning groups for analysis between the two versions.
If you are using the new version, just giving the different groups a unique color is not enough to define them as separate groups. It's a bit more complicated than it was in the previous version, but it allows you to color/name your groups independently of the groups you assign for you DFA.
This is how you define groups for analysis:
- first you add an extra column in front of your data matrix
- Then you give the same name to each individual of the same group (e.g. "male" for all the male specimens and "female" for all the females,...). You can leave the unique names of your specimens in the first column untouched.
- You then have to check the "column attribute"-button in the upper left corner
- Now you can see that two extra pink rows have been added named "type" and "name"
- If you now click on the first cell next to 'type', you get a drop down menu from which you can select "group"
- Now uncheck the "column attribute"-button, select your data matrix and run the Discriminant Function Analysis.
This should normally do the job... Perhaps there's an easier way to do it, but this works for me.
To be honest I think the old version is a bit more straightforward in that you just have to give your groups a unique color to define them as separate groups.
Let me know if this works;
All the best,
Ben
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