Here's the code. I don't want it to even touch the vector if there are
already "1's & 2's"
structure(list(subject = c(8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L,
8L, 42L, 42L, 42L, 42L, 42L, 42L, 42L, 42L, 42L, 42L, 6L, 6L,
6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L), resp = c(2, 1, 1, 2, 1, 2, 1,
1, 1, 1, 4, 4, 2, 2, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2,
1, 2)), .Names = c("subject", "resp"), row.names = c(1L, 2L,
3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 4161L, 4162L, 4163L, 4164L,
4165L, 4166L, 4167L, 4168L, 4169L, 4170L, 166L, 167L, 168L, 169L,
170L, 171L, 172L, 173L, 174L, 175L), class = "data.frame")
R version 2.12.2 (2011-02-25)
Platform: x86_64-pc-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United
States.1252 LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C LC_TIME=English_United
States.1252
attached base packages:
[1] splines stats graphics grDevices utils datasets
methods base
other attached packages:
[1] car_2.0-10 nnet_7.3-1 MASS_7.3-11 Hmisc_3.8-3
survival_2.36-5 RODBC_1.3-2
loaded via a namespace (and not attached):
[1] cluster_1.13.3 grid_2.12.2 lattice_0.19-17 tools_2.12.2
On Mon, Aug 8, 2011 at 10:43 AM, Joshua Wiley <jwiley.ps...@gmail.com>wrote:
> On Mon, Aug 8, 2011 at 8:23 AM, Edward Patzelt <patze...@umn.edu> wrote:
> > Thanks Josh for the code to post I have been trying to figure out how to
> do
> > that. Your code works except that it changes subjects that responded
> with
> > "1 & 2" to all 1's. What does the "ave" argument mean in the execution
> of
>
> Not in the example data you provided on my system. If you can provide
> data (preferablly using dput() or uploading a txt file on a file
> hosting service) that reproduces this issue, I will be happy to look
> at it for you. You might also try reporting your sessionInfo() ---
> this may be related to the version of R or the packages you are using,
> but at present I have no information.
>
> > the function?
>
> 'ave' is not an argument in the function. ave() *is* a function. I
> call with() to have the ave() function evaluated in an environment
> created from dat (the data). See ?ave and ?with I could have
> equivalently (though more cumbersomely) written:
>
> ave(dat$Slide1_RESP, dat$Subject, FUN = foo))
>
> because ave will now be evaluated in the global environment, it will
> not have access to the variables stored in 'dat' unless explicitly
> told that they are in dat (as above).
>
> Cheers,
>
> Josh
>
> > library(car)
> > foo <- function(x) {
> > if (any(grepl(4, x))) {
> > x <- recode(x, "2 = 1; 4 = 2")
> > }
> > return(x)
> > }
> > ## do it
> > dat$test <- with(dat, ave(Slide1_RESP, Subject, FUN = foo))
> > On Fri, Aug 5, 2011 at 4:56 PM, Joshua Wiley <jwiley.ps...@gmail.com>
> wrote:
> >>
> >> On Fri, Aug 5, 2011 at 2:34 PM, Edward Patzelt <patze...@umn.edu>
> wrote:
> >> >
> >> > The problem is that we were using a task where some subjects responded
> >> > with "1 & 2" and some responded with "2 & 4". So there is overlap for
> 2
> >> > because it means stimulus 1 for subject 1 and it means stimulus 2 for
> >> > subject 2.
> >> >
> >> > subject
> >> >
> >> > subject_1
> >> >
> >> > 1
> >> >
> >> > subject_1
> >> >
> >> > 1
> >> >
> >> > subject_1
> >> >
> >> > 1
> >> >
> >> > subject_1
> >> >
> >> > 2
> >> >
> >> > subject_1
> >> >
> >> > 2
> >> >
> >> > subject_2
> >> >
> >> > 4
> >> >
> >> > subject_2
> >> >
> >> > 2
> >> >
> >> > subject_2
> >> >
> >> > 2
> >> >
> >> > subject_2
> >> >
> >> > 4
> >> >
> >> > subject_2
> >> >
> >> > 2
> >> >
> >> > subject_2
> >> >
> >> > 2
> >> >
> >> > subject_2
> >> >
> >> > 2
> >> >
> >> > subject_2
> >> >
> >> > 4
> >>
> >> FYI providing data in the format above (this list is plain text) makes
> >> the job of those trying to help substantially harder. You can use
> >> dput(). For example, if I wanted to share the first 10 rows of the
> >> built in mtcars data set, I would just copy and paste the output from
> >> running:
> >>
> >> dput(mtcars[1:10, ])
> >>
> >> Anyway, here you go, this should be directly executable as long as you
> >> have installed the 'car' package.
> >>
> >> ## your data in a form easily copied and pasted into the console
> >> ## created using dput() (highly recommended for future posts)
> >> dat <- structure(list(subject = c("subject_1", "subject_1", "subject_1",
> >> "subject_1", "subject_1", "subject_2", "subject_2", "subject_2",
> >> "subject_2", "subject_2", "subject_2", "subject_2", "subject_2"
> >> ), val = c(1, 1, 1, 2, 2, 4, 2, 2, 4, 2, 2, 2, 4)), .Names =
> c("subject",
> >> "val"), row.names = c(NA, -13L), class = "data.frame")
> >>
> >> ## load the required package for recoding
> >> ## though it is overkill for only two levels
> >> require(car)
> >>
> >> ## define a function to do the recoding
> >> foo <- function(x) {
> >> if (any(grepl(4, x))) {
> >> x <- recode(x, "2 = 1; 4 = 2")
> >> }
> >> return(x)
> >> }
> >>
> >> ## do it
> >> dat$altval <- with(dat, ave(val, subject, FUN = foo))
> >>
> >> Cheers,
> >>
> >> Josh
> >>
> >>
> >> >
> >> > On Fri, Aug 5, 2011 at 4:25 PM, Joshua Wiley <jwiley.ps...@gmail.com>
> >> > wrote:
> >> >>
> >> >> Hi Edward,
> >> >>
> >> >> You can try something like:
> >> >>
> >> >> u.ppl <- unique(init.dat1$grid)
> >> >> l.ppl <- ifelse(grepl(4, init.dat1$Slide1_RESP), 2,
> >> >> init.dat1$Slide1_RESP)
> >> >>
> >> >> Note that this is not exact as you have not provided a reproducible
> >> >> example. I am not exactly sure how you are putting 1 for 2 and 2
> for
> >> >> 4, if the value is equal to 4, but presumably it is clearer with
> data.
> >> >> In any event, look at ?ifelse it is something like a vectorized if
> >> >> statement and is, I believe, preferable to your use of a for loop. I
> >> >> can probably give you a runnable solution if you can give the first
> >> >> few rows of the relevant data.
> >> >>
> >> >> Cheers,
> >> >>
> >> >> Josh
> >> >>
> >> >> On Fri, Aug 5, 2011 at 2:15 PM, Edward Patzelt <patze...@umn.edu>
> >> >> wrote:
> >> >> > I want to write code that says "If you find an element equal to 4
> in
> >> >> > this
> >> >> > vector for each person in the data set tested separately, then put
> in
> >> >> > 1 for
> >> >> > 2 and 2 for 4, else leave the variable as is"
> >> >> >
> >> >> > u.ppl <- (unique(init.dat1$grid))
> >> >> > l.ppl <- length(u.ppl)
> >> >> > for (i in 1:l.ppl)
> >> >> > {
> >> >> > if (grep("4",init.dat1$Slide1_RESP)) {2 == 1, 4 == 2};
> else
> >> >> > init.dat1$Slide1_RESP
> >> >> >
> >> >> > }
> >> >> >
> >> >> > --
> >> >> > Edward H. Patzelt
> >> >> > Research Assistant TRiCAM Lab
> >> >> > University of Minnesota Psychology/Psychiatry
> >> >> > VA Medical Center
> >> >> > Office: S355 Elliot Hall - Twin Cities Campus
> >> >> > Phone: 612-626-0072 Email: patze...@umn.edu
> >> >> >
> >> >> > Please consider the environment before printing this email
> >> >> > www.psych.umn.edu/research/tricam
> >> >> >
> >> >> > [[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.
> >> >> >
> >> >> >
> >> >>
> >> >>
> >> >>
> >> >> --
> >> >> Joshua Wiley
> >> >> Ph.D. Student, Health Psychology
> >> >> Programmer Analyst II, ATS Statistical Consulting Group
> >> >> University of California, Los Angeles
> >> >> https://joshuawiley.com/
> >> >
> >> >
> >> >
> >> > --
> >> > Edward H. Patzelt
> >> > Research Assistant TRiCAM Lab
> >> > University of Minnesota Psychology/Psychiatry
> >> > VA Medical Center
> >> > Office: S355 Elliot Hall - Twin Cities Campus
> >> > Phone: 612-626-0072 Email: patze...@umn.edu
> >> >
> >> > Please consider the environment before printing this email
> >> > www.psych.umn.edu/research/tricam
> >>
> >>
> >>
> >> --
> >> Joshua Wiley
> >> Ph.D. Student, Health Psychology
> >> Programmer Analyst II, ATS Statistical Consulting Group
> >> University of California, Los Angeles
> >> https://joshuawiley.com/
> >
> >
> >
> > --
> > Edward H. Patzelt
> > Research Assistant TRiCAM Lab
> > University of Minnesota Psychology/Psychiatry
> > VA Medical Center
> > Office: S355 Elliot Hall - Twin Cities Campus
> > Phone: 612-626-0072 Email: patze...@umn.edu
> >
> > Please consider the environment before printing this email
> > www.psych.umn.edu/research/tricam
> >
>
>
>
> --
> Joshua Wiley
> Ph.D. Student, Health Psychology
> Programmer Analyst II, ATS Statistical Consulting Group
> University of California, Los Angeles
> https://joshuawiley.com/
>
--
Edward H. Patzelt
Research Assistant TRiCAM Lab
University of Minnesota Psychology/Psychiatry
VA Medical Center
Office: S355 Elliot Hall - Twin Cities Campus
Phone: 612-626-0072 Email: patze...@umn.edu
Please consider the environment before printing this email
www.psych.umn.edu/research/tricam
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