search for: newscore

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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