I have a data set in the format below. I would like to perform a factor
analysis on BM1-BM20 as they are 20 biomechanical measurements of the trial
(hitting a baseball). However, my observations are not independent and, I
assume, I have to account for this. I have consulted the R literature via
RSeek and Google (and I have consulted some very knowledgeable colleagues)
and cannot find any method of doing this in R. Is someone aware of a method
of reducing the 20 biomechanical measurements?
Thank you for your help.
Greg
ID PitchType Location SwingNumber BM1...BM20 Hit
Velocity
1 Fastball 1 1 xx ... xx 1
62
1 Fastball 1 2 xx ... xx 1
68
1 Fastball 1 3 xx ... xx 0
1 Fastball 1 4 xx ... xx 0
1 Fastball 1 5 xx ... xx 1
71
1 Fastball 2 1 xx ... xx 0
1 Fastball 2 2 xx ... xx 1
61
1 Fastball 2 3 xx ... xx 1
64
1 Fastball 2 4 xx ... xx 1
59
1 Fastball 2 5 xx ... xx 0
1 Fastball 2 6 xx ... xx 0
1 Fastball 2 7 xx ... xx 0
1 Fastball 2 8 xx ... xx 0
1 Fastball 3 1 xx ... xx 1
78
1 Fastball 3 2 xx ... xx 0
1 Fastball 3 3 xx ... xx 1
74
1 Fastball 4 1 xx ... xx 0
1 Fastball 4 2 xx ... xx 1
69
1 Fastball 4 3 xx ... xx 1
72
1 Fastball 4 4 xx ... xx 1
65
1 Fastball 4 5 xx ... xx 0
1 Fastball 4 6 xx ... xx 0
1 Fastball 4 7 xx ... xx 0
1 Fastball 4 8 xx ... xx 1
74
1 Fastball 4 9 xx ... xx 1
78
1 Fastball 4 10 xx ... xx 1
76
1 Fastball 5 1 xx ... xx 0
1 Fastball 5 2 xx ... xx 1
53
1 Fastball 5 3 xx ... xx 0
1 Fastball 5 4 xx ... xx 1
51
1 Fastball 5 5 xx ... xx 0
1 Fastball 5 6 xx ... xx 1
55
.
.
.
40 Fastball 5 1 xx ... xx 0
40 Fastball 5 2 xx ... xx 0
40 Fastball 5 3 xx ... xx 1
60
40 Fastball 5 4 xx ... xx 0
40 Fastball 5 5 xx ... xx 0
--
Gregory E. Gilbert, EdD, MSPH, PStat®
ASA Accredited Professional Statistician™
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
