I agree with this and I'm not very sure why you feel you need the signs
fixed one way: they are arbitrary and how they come out is generally a
function of things in the handling of rounding as values hit the limit
of the finite arithmetic in the particular program and OS and hardware
on which it's
Dear Aaron,
Many thanks for your reply.
Please allow me to illustrate my query a bit.
I take some data, throw it to prcomp and extract the x data frame from prcomp.
>From ?prcomp:
x: if ‘retx’ is true the value of the rotated data (the centred
(and scaled if requested) data mu
First one needs to remove the extraneous line-ends that you created by using an
editor that inserts those line-ends (or perhaps it was your mail-client that
added them because you failed to post in plain-text. I removed those files "by
hand" and then created a text "file".
txt <- "2015-01-01 00
Use absolute value
Tim
-Original Message-
From: R-help On Behalf Of Ashim Kapoor
Sent: Wednesday, October 12, 2022 7:48 AM
To: R Help
Subject: [R] prcomp - arbitrary direction of the returned principal components
[External Email]
Dear R experts,
>From ?prcomp,
snip -
Note:
Dear R experts,
>From ?prcomp,
snip -
Note:
The signs of the columns of the rotation matrix are arbitrary, and
so may differ between different programs for PCA, and even between
different builds of R.
snip --
My problem is that I am building an index based on Pr
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