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fr32
2005 Mar 24
1
RE: [R] Mapping actual to expected columns for princomp object
...> rm(x1,x2,y,frx,frxy)
>
> z1 <- rnorm(10)
> z2 <- rnorm(10)
> frz <- data.frame(z1,z2)
>
> predict(lm1, frz) # gives error: Object "x1" not found
> predict(pca1, frz) # gives no error, indicating column names ignored
>
> z3 <- rnorm(10)
> fr3z <- data.frame(frz,z3)
> predict(pca1,fr3z) # gives error due to unexpected number of columns
>
> loadings(pca1) # shows linear combos of variables corresponding to PCs
>
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2005 Mar 24
0
Mapping actual to expected columns for princomp object
...)
lm1 <- lm(y~x1+x2,frxy)
pca1 <- princomp(frx)
rm(x1,x2,y,frx,frxy)
z1 <- rnorm(10)
z2 <- rnorm(10)
frz <- data.frame(z1,z2)
predict(lm1, frz) # gives error: Object "x1" not found
predict(pca1, frz) # gives no error, indicating column names ignored
z3 <- rnorm(10)
fr3z <- data.frame(frz,z3)
predict(pca1,fr3z) # gives error due to unexpected number of columns
loadings(pca1) # shows linear combos of variables corresponding to PCs