[R] barplot with log base 2 scale or shift the x-axis

From: Summer Nitely <summer.nitely_at_gmail.com>
Date: Fri, 02 May 2008 16:13:33 -0600

I have data that is on a log base 2 scale. It goes from negative factors of 2 to positive ones. I am using barplot. However, I don't want the data centered at 0 - I want the min of the yaxis to be just below the lowest value in the data. The plots are kind of deceptive switching between positive and negative. I see that barplot has a log option, but that doesn't seem to be adjustable for a log base 2 scale. Does anyone know how to adjust the x-axis, so it's at y= -value rather than at y=0? I''d rather not add a factor to the data, unless I can have accurate labels on the y-axis.
Any ideas?

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