MANOVA issue

[Kera Nab]

but i cant seem to figure out how to proceed

Attempting to undergo posthoc testing for a manova and a little stuck.

I understand I have to do manovatest, showorder
but I dont understand how to take the response from that and turn it into the matrix
In the example on the stata manual - I simply just have no idea how they got the values for the matrix c1 = (3,-1,-1,-1,0)

(also got a little stuck trying to use dataex to help this response)

Software : Stata15
My code :
manova alpha bravo charlie = delta
mvreg
mvreg, notable noheader corr
manovatest, showorder

[Joseph Coveney]

You got stuck using dataex? At its simplest syntax, you just type

dataex

at the command line, and then copy-and-paste its output, as-is, into your Statalist post.

Anyway, what post hoc testing do you plan to do? If it's just pairwise testing of differences between surgical-sponge treatment groups on the mean vector of the outcome variables, then you might be better off using hotel and manual adjustments for multiple testing. Something like

hotel alpha bravo charlie if inlist(delta, 1, 2), by(delta)

or however you've identified your treatment groups.

Depending upon the nature of the post hoc testing that you seek to do, you can also use a combination of margins and contrast after manova in lieu of manovatest. The postestimation help file for manova shows and example of that to help get you started.

help manova_postestimation##margins