[R] Sourcing my file does not print command outputs

[William Dunlap]

You can leave your script as it was and use source()'s
print.eval=TRUE or echo=TRUE arguments to get the
autoprinting done as it is at the command line
(echo=TRUE also prints the commands).

E.g., for the file "/tmp/x.R" containing the 2 lines
  d <- mtcars[,c("am","gear","hp","mpg")]
  summary(lm(data=d, mpg~.))
I get
  > source("/tmp/x.R")
or
  > source("/tmp/x.R", echo=TRUE) # this is the only line I typed

  > d <- mtcars[,c("am","gear","hp","mpg")]

  > summary(lm(data=d, mpg~.))

  Call:
  lm(formula = mpg ~ ., data = d)
  [... many output lines elided ...]
  F-statistic: 34.83 on 3 and 28 DF,  p-value: 1.377e-09
or
  > source("/tmp/x.R", echo=FALSE, print.eval=TRUE) # only line I typed
  
  Call:
  lm(formula = mpg ~ ., data = d)
  [... many output lines elided ...]
  F-statistic: 34.83 on 3 and 28 DF,  p-value: 1.377e-09

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf
> Of John Kane
> Sent: Thursday, February 07, 2013 10:57 AM
> To: James Jong; r-help at r-project.org
> Subject: Re: [R] Sourcing my file does not print command outputs
> 
> From ?source
> "Note that running code via source differs in a few respects from entering it at the R
> command line. Since expressions are not executed at the top level, auto-printing is not
> done. So you will need to include explicit print calls for things you want to be printed"
> 
> John Kane
> Kingston ON Canada
> 
> 
> > -----Original Message-----
> > From: ribonucleico at gmail.com
> > Sent: Thu, 7 Feb 2013 13:36:56 -0500
> > To: r-help at r-project.org
> > Subject: [R] Sourcing my file does not print command outputs
> >
> > I looked at the documentation of source() and summary(), and I could not
> > find the reason why calling something like:
> >
> >> summary(resamps)
> >
> > from the command line, works (it prints the summary)
> >
> > whereas calling
> >
> > summary(resampls)
> >
> > from a file that I source with source("my_file.r") does not print
> > anything.
> >
> > How can I get summary(resamps) to print when I source a file with this
> > command?
> >
> > Thanks,
> >
> > James
> >
> > 	[[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at 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.
> 
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