Perfect! Thanks for the help. On Wed, Nov 9, 2011 at 4:27 PM, John Fox <j...@mcmaster.ca> wrote: > Dear Dustin, > >> -----Original Message----- >> From: Dustin Fife [mailto:fife.dus...@gmail.com] >> Sent: November-09-11 2:12 PM >> To: John Fox >> Cc: r-help@r-project.org >> Subject: Re: [R] path.diagram in SEM--display covariances without >> variances >> >> Thanks for the quick response...I've never edited someone else's >> package before. How do I go about doing that? > > I wouldn't change the sem package, but rather create your own version of > pathDiagram(). You could examine the package sources, but, more simply, to > see the code for the function, type its name at the command prompt: > >> library(sem) > Loading required package: MASS > Loading required package: matrixcalc >> pathDiagram > function (model, ...) > { > UseMethod("pathDiagram") > } > <bytecode: 0000000006E1CEA8> > <environment: namespace:sem> > > So pathDiagram() is a generic function. What methods are available? > >> methods(pathDiagram) > [1] pathDiagram.sem* > > Non-visible functions are asterisked > > There is, therefore just one method, for objects of class "sem", hidden in > the sem namespace. To see it (most lines elided): > >> sem:::pathDiagram.sem > function (model, file, min.rank = NULL, max.rank = NULL, same.rank = NULL, > variables = model$var.names, parameters = rownames(model$ram), > ignore.double = TRUE, edge.labels = c("names", "values", > "both"), size = c(8, 8), node.font = c("Helvetica", 14), > edge.font = c("Helvetica", 10), rank.direction = c("LR", > "TB"), digits = 2, standardize = FALSE, output.type = c("graphics", > "dot"), graphics.fmt = "pdf", dot.options = NULL, ...) > { > . . . > cat(file = handle, "}\n") > if (output.type == "graphics" && !missing(file)) { > cmd <- paste("dot -T", graphics.fmt, " -o ", graph.file, > " ", dot.options, " ", dot.file, sep = "") > cat("Running ", cmd, "\n") > result <- try(system(cmd)) > } > invisible(NULL) > } > <bytecode: 00000000071B9568> > <environment: namespace:sem> > > Just copy the functions into an editor and make whatever changes you want. > > Best, > John > >> >> On Wed, Nov 9, 2011 at 12:47 PM, John Fox <j...@mcmaster.ca> wrote: >> > Dear Dustin, >> > >> >> -----Original Message----- >> >> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- >> >> project.org] On Behalf Of Dustin Fife >> >> Sent: November-09-11 10:57 AM >> >> To: r-help@r-project.org >> >> Subject: [R] path.diagram in SEM--display covariances without >> >> variances >> >> >> >> Forgive me if I'm posting to the wrong place....It's my first time >> >> posting. >> >> >> >> Here's the situation: I'm using the sem package and making path >> >> diagrams using path.diagrams. Suppose I have the following code: >> >> >> > . . . >> > >> >> The diagram is produces is hard to read because of the many >> variances >> >> that are shown. The covariance estimates are important for my >> >> diagram, but the variances are not. Is there a way to suppress the >> >> variance arrows without suppressing the covariance arrows? >> > >> > No, but (1) pathDiagram() (the name of the function in the current >> > version of the sem package) produces an editable text file, from >> which >> > you could remove the arrows that you don't want to see; and (2) you >> > could modify >> > pathDiagram() -- the code for the function is, after all, available >> to >> > you >> > -- so that it does what you want. >> > >> > I hope this helps, >> > John >> > >> > -------------------------------- >> > John Fox >> > Senator William McMaster >> > Professor of Social Statistics >> > Department of Sociology >> > McMaster University >> > Hamilton, Ontario, Canada >> > http://socserv.mcmaster.ca/jfox >> > >> > >> > >> >> >> >> -- >> >> Dustin Fife >> >> Graduate Student, Quantitative Psychology University of Oklahoma >> >> >> >> ______________________________________________ >> >> 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. >> > >> > >> >> >> >> -- >> Dustin Fife >> Fife Photography >> www.fifephotography.com >> i...@fifephotography.com >> fife.dus...@gmail.com >> 405.414.5599 > >
-- Dustin Fife Fife Photography www.fifephotography.com i...@fifephotography.com fife.dus...@gmail.com 405.414.5599 ______________________________________________ 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.
