possible reason for merge not working
On Aug 1, 2011, at 12:17 PM, world peace wrote:
Hi Guys, working on a "merge" for 2 data frames. Using the command: x <- merge(annotatedData, UCSCgenes, by.x="names", by.y="Ensembl.Gene.ID", all.x=TRUE) names and Ensembl.Gene.ID are columns with similar elements from the x and y data frames. annotatedData has 8909 entries, so has x(as expected). x has columns for UCSCgenes, but there is no data in them, all n/a, as if no match exists. This is not true as I can manually see and find many similarities
The merge function does not work on "similarities". Matches need to be exact.
between the names and UCSCgenes columns. I am wondering if there is any syntax error, or logical.
Probably logical.
David Winsemius, MD West Hartford, CT