Amelia February 2014

amelia@lists.gking.harvard.edu

4 participants
3 discussions

How to create a combined correlation matrix after using Amelia

by Estefania Ruiz

Hello, I have a dataset with some missing values, I used Amelia on this dataset and ended up with 5 imputed datasets. I calculated the correlation matrix for each dataset, therefore I have 5 correlation matrices. I would like to know how to combine these 5 matrices in order to get one final correlation matrix for my dataset? Thank you very much ERV

9 years, 11 months

Imputations with Amelia II

by Yunyan Zhang

Dear Amelia Initiator, This is Yunyan Zhang. I am a senior student majoring in Industrial and Operations Engineering at the University of Michigan. Our team is doing our senior design and we want to use R to deal with our missing data. What we want is to impute the missing data with EM algorithm. We found Amelia II on Inside R website and tried Amelia II. However, we are confused with the return value of *amelia {Amelia}. *Will it return the imputed data or something else? If it does not return the imputed dataset, what is the next step for us to impute our missing data in the original dataset so that we could proceed to the next step. Thanks for your help and patience. Sincerely, Yunyan Zhang (Jackie) 张云艳 Industrial and Operations Engineering, B.S.E. 2014 College of Engineering, University of Michigan Electrical and Computer Engineering, B.S.E. 2014 UM-SJTU Joint Institute, Shanghai Jiao Tong University jackiezh(a)umich.edu | 734-757-3234

9 years, 11 months

Amelia compatibility issue with Rcpp

by Garrett Glasgow

Hello all, I noticed when trying to run imputations in Amelia 1.7.2 that I would get error messages indicating some compatibility problems with the Rcpp package. For instance, I was getting the error: function 'dataptr' not provided by package 'Rcpp' I was able to solve this problem by first installing the latest version of the Rcpp package (0.11.0), and then installing Amelia. Hopefully this will be helpful to other people having this issue. Could Amelia be calling for the wrong version of Rcpp? There was a lot of recent discussion about fixing some compatibility issues between Rcpp and many CRAN packages (of which Amelia was one), and I think all the fixes are incorporated into Rcpp 0.11.0. -Garrett

10 years, 2 months

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Amelia February 2014