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Hi All, I need to calculate the median for even number of data points.However instead of calculating the arithmetic mean of the two middle values,I need to calculate their geometric mean. Though I can code this in R, possibly in a few lines, but wondering if there is already some built in function. Can somebody give a hint? Thanks in advance [[alternative HTML version deleted]]

...his modification of the median for, I would consider >>> modifying the (quite short) median.default function, >>> with appropriate additional data checks. >>> >>> Peter Ehlers >>> >>>> >>>>>>> Skull Crossbones<witch.of.agnessi at gmail.com> ? 15/01/2011 16:26>>> >>>> Hi All, >>>> >>>> I need to calculate the median for even number of data points.However >>>> instead of calculating >>>> the arithmetic mean of the two middle values,I need to calculate...

Hello all, I was trying to make a volcano plot with some real data, using log2(ratio) vs. Z-value significance. However the scatter of the points is too less contrary to 'normal' volcano plots and I'm getting a sharp 'V' shaped plot. *Am I doing something wrong here?* The data(ratio) is available from pastebin: http://pastebin.com/m2Jss3qF data <-