I used RMySQL for import database, sometimes when I try to close the connection, I receive the following error: Error in mysqlCloseConnection(conn, ...) : connection has pending rows (close open results set first) I have no other ways of correcting this other than restarting the computer, anything I can do so solve this? Thanks!
As the title says: How can I plot a legend outside the plotting area when using base graphics? I thought about fiddling around with layout and produce an empty plot to only contain the legend, but I would be interested in a way using just the base graph facilities and e.g., par(mar = ) to get some space on the right of the plot for the legend. Here an example: plot(1:3, rnorm(3), pch = 1, lty = 1,
I've been creating some bar-charts and I was wondering is it possible to colour bars on a chart depending on whether they lie above or below the x-axis? For clarification, this is the type of bar-chart I mean: Ideally I would like to be able to colour the bars above a separate colour to those below so the graph looks more appealing, I've been searching but I can't find any method of doing this, ca
Suppose I have a vector that is nested in a dataframe with one or two levels. Is there a quick and dirty way to access the last value, without using the length() function? Something ala PERL's $# special var? So I would like something like: dat$vec1$vec2[$#] instead of: dat$vec1$vec2[length(dat$vec1$vec2)]
Let's say we have a statement that produces integer(0), e.g. a <- which(1:3 == 5) What is the safest way of catching this?
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