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st: PCA, reverse scorings
Dear all,
I am working on creating an index using PCA.
When running PCA the first time, with the original values the loadings come up with some
unexpected signs
KI index loadings
original variables
skillw -0.51811
eduatt 0.576
rd 0.55153
itexp -0.30919
I would expect that skillw and itexp would have positive values affecting new variable I create
with the command score. I have multiplied both variables by -1 to get the opposite sign. the
results are:
KI index loadings
newskillw 0.51811
eduatt 0.576
rd 0.55153
newitexp 0.30919
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