Looking at the documentation for try() I am not sure how it would be best applied in this situation. My background is not extensively programming. Would writing a function first be appropriate?
Also, I'm not sure just a simple error catch would solve my first problem. I do, in fact, need it to plot the barplot based on the table which is created above. However, R doesn't like the lack of several columns. Further guidance would be appreciated. -- all the best, Lee Mueller ISA Certified Arborist MI-4148A Registered Forester #46043 On Wed, May 9, 2012 at 4:30 AM, Jim Holtman <jholt...@gmail.com> wrote: > ?try > > Sent from my iPad > > On May 8, 2012, at 22:03, Lee <muell...@gmail.com> wrote: > > > I have a series of data which is managed through a loop. The loop creates > > "pivot tables" of my data using the *cast* function in the > > *reshape*library. For the most part, the data is all plotted > > correctly. > > Unfortunately, there are a couple of data sets which create errors and > halt > > the loop. > > > > One of the tables looks like the following: > > > > dbh Black Walnut > > 1 8 38.19722 > > 2 10 48.89244 > > 3 12 38.19722 > > > > When the loop attempts the barplot() function, the following error is > > returned: > > Error in seq_len(p) : argument must be coercible to non-negative integer > > > > In other cases, there is simply no data in the specified set of data. > > Therefore, the table is full of NA's. Obviously, this does not need to be > > plotted, but I cannot simply remove it from the larger database. I need > my > > loop to continue regardless of if it runs into these issues. > > > > *Question: What can I do to ensure the above single variable table will > > plot correctly? and what can I do to suppress errors on the datasets > which > > do not have data so the loop continues?* > > > > full code: http://pastebin.com/LB88hpfM > > > > Thank you in advance. > > > > -- > > all the best, > > Lee Mueller > > ISA Certified Arborist MI-4148A > > Registered Forester #46043 > > > > [[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. > [[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.
