search for: clinicopathological

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2010 May 11
3
Advice needed on awkward tables
Dear r-help list members, I am quite new to R, and hope to seek advice from you about a problem I have been cracking my head over. Apologies if this seems like a simple problem. I have essentially two tables. The first (Table A) is a standard patient clinicopathological data table, where rows correspond to patient IDs and columns correspond to clinical features. Records in this table are stored as 1 or 0 (denoting presence). An example is provided below. The second (Table B) is a table that represents a 'key' to Table A. This Table B has a category field,...