Try this: plot(January[January[,3] > 0, 3:4])
On Thu, Sep 4, 2008 at 1:28 PM, Steve Murray <[EMAIL PROTECTED]> wrote: > > > Dear all, > > I have a dataset of four columns, and I wish to plot (as a scatter graph) > the values of the third column where the values are greater than zero, and > the fourth column. > > I tried doing this via the plot command itself, but got into a bit of a > mess (resulting in errors!). My dataframe is called 'January': > > > plot(January[3(>0):4]) > Error: unexpected '>' in "plot(January[3(>" > > > After a few variations on this, I thought I'd try making a new object which > includes all values from the third column of January>0 (to plot in a > separate step) as follows: > > > JanFilter <- January[3]>0 > > No error here. However, when I display the 'values' of JanFilter, it shows > that instead of keeping the numerical values, the above operation simply > displays the results of the logical test: > > > head(JanFilter) > Value > [1,] FALSE > [2,] TRUE > [3,] TRUE > [4,] TRUE > [5,] TRUE > [6,] TRUE > > > This is obviously no good for plotting the numerical values on axes! > > So my question is, how do I perform 'if' statements in order to filter out > various parts of a dataset, for plotting on a graph. > > Many thanks, > > Steve > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
