search for: diagnosis1

...ows of the matrix, levels(marker) the columns and values are the actual content of the matrix. However, as can been seen in the dataframe, some observations are missing and should result in <NAs> in the resulting matrix, giving a result like this: marker 1 2 3 diagnosis1 value value value diagnosis2 value value value diagnosis3 value NA value Can anyone help out with some code for this? I have tried to look this up in the mailing list as it has probably been answered before but only found aspects of the problem which I was just not...

Hi, I am still new to R and have, in spite of searching all over, found no "understandable" documentation for how to join two (or more) frequency tables. Why would I want to do that and what do I mean by "joining" ? Let me try to explain: I have a diagnosis form that allows registration of up to three diagnosis codes on animals with birth defects, like this: father.id