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Hello, I have two questions: 1. How can I get black and white graphics using the pdf() device? I have tried pdf(Name.pdf, bg="white", fg"black"), but I still get full-color graphics. 2. When using lattice, how do I change the title for each panel? By default it uses the categories of the grouping factor. I would like to modify the labels in the graphic without changing

Hello all, I posted a question some days ago without getting any answers, perhaps, as one of you kindly pointed out, because the question was not clearly stated. Let me reformulate it: In a frame, a column named C2 represents a numeric variable (checked with is.numeric(C2)). Some rows in the frame have an undefined value for C2, represented in the table by a ? sign. The remaining rows have

Hello, I have a problem with the values for one column in a table. The variable represented in this column is numeric (I get TRUE when I ask is.numeric(x)). However, the values are listed ordinally and with row numbers as values, not with the ones that appear in the table. Some rows have an undefined value for this column, which appears as ? in the table (this is not an error). I wonder whether