Dear Ryan, On 9 October 2013 21:26, Ryan Morrison <ryan.r.morri...@me.com> wrote: > I'm attempting to use the bnlearn package to calculate conditional > probabilities, and > I'm running into a problem when the "cpquery" function is used within a loop. > I've > created an example, shown below, using data included with the package. When > using the cpquery function in a loop, a variable created in the loop ("evi" > in the > example) is not recognized by the function. I receive the error: > > Error in parse(text = evi) : object 'evi' not found [snip]
Based on the second example you emailed me off-list, it appears to be a scoping problem; that's why the same code works if it's not inside a function. I will try to debug this soon, but I am not an expert in R parsing mechanisms so it will take some time. In the mean time, you can use cpquery(..., method = "lw") instead of the default cpquery(..., method = "ls") if your query looks like the one in the example. The former does not rely on unevaluated expressions, but takes the conditioning values as a list, and it should work regardless. However, if you do so I suggest you should install the latest bugfix snapshot from bnlearn.com to avoid a few other bugs in cpquery(..., method = "lw"). Cheers, Marco -- Marco Scutari, Ph.D. Research Associate, Genetics Institute (UGI) University College London (UCL), United Kingdom ______________________________________________ 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.