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How to use PC1 of PCA and dim1 of MCA as a predictor in logistic regression model for data reduction
2011 Aug 17
4
How to use PC1 of PCA and dim1 of MCA as a predictor in logistic regression model for data reduction
...101,] -1.86940216 0.5918128751 0.87352987 -1.118865117
[102,] -2.19096615 1.2845448725 0.25227354 -0.938612155
[103,] 0.77981265 -1.1931087587 0.23934034 0.627601413
[104,] -2.37058237 -1.4014005013 -0.73578248 -1.455055095
Then, I used mjca1$rowcoord[, 1] as the followings.
> mydata.df$NewScore <- mjca1$rowcoord[, 1]
I used this "NewScore" as one of the predictors for the model instead of
original 9 variables.
The final logistic model obtained by use of MCA was similar to the one
obtained by use of PCA.
My questions are;
1. Is it O.K. to perform PCA for data consisting of...
2010 Dec 03
3
recode letters to numbers
Hello,
I have a dataframe assigning various scores on around 20 variables to a list of
countries. The scores are rated on a scale of (D, C, B, A) and there are also
some not rated ones (NR) and others are left blank (NA). I now wanted to
transfer the scores into numeric values (such as NR=0, D=25, C=50, B=27, A=100),
while also leaving the NA in the dataframe. Can I transform the whole