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Perfect! Thanks so much, Sarah! -- View this message in context: http://r.789695.n4.nabble.com/Changing-x-axis-values-displayed-on-histogram-tp4636032p4636051.html Sent from the R help mailing list archive at Nabble.com.

Thank you David! David Winsemius wrote: > > > How.... did you do the "t-test"? > > t.test(Score,Color) John -- View this message in context: http://www.nabble.com/Selecting-groups-with-R-tp25088073p25088342.html Sent from the R help mailing list...

Thank you so much, Michael. This solution is just what I was looking for. Many thanks! John -- View this message in context: http://r.789695.n4.nabble.com/Mean-and-individual-growth-curve-trajectories-tp3021672p3021746.html Sent from the R...

Hi Phil and Jeff, Thanks so much for taking the time to help me solve this issue! Both approaches work perfectly. Each of your approaches helped me learn more about what R can do. I really appreciate your help! Very...

David Winsemius wrote: > > t.test expects two numeric vectors, not a numeric vector and a > grouping indicator. > > > t.test(dataset[dataset$Color=="RED", "Score"], dataset[dataset > $Color=="WHITE", "Score"] ) > > Thank you again, David! I also just realized I could have...

I was trying to save a data frame to an excel file using the following command: write.table(myData, file="myData.csv",sep=",", row.names=F) The command works for some data frames, but for other data frames, I get...

I'm trying to understand how to plot individual growth curve trajectories, with the overall mean trajectory superimposed (preferably in a slightly thicker line, maybe in black) over the individual trajectories. Using the sleepstudy data in lme4, here is the...

Tal, Thanks for the information. I actually did read through the help for the reshape package, though being relatively new to R, I don't quite understand the ins and outs of the command. I tried using the melt command...

I just upgraded my version of R from 2.8.1 to 2.9.0. After doing so, I now have problems using the package installer to reinstall all my packages. Some download and install without problems, but for others...

Is it possible to change the x-axis values in a histogram to reflect binned values? Here are my data: histexample<-c(6,7,7,8,8,8,9,9,9,9,9,10,10,10,10,10,10,10...

I'm trying to obtain within-group correlations on a subset of variables. I first selected my variables using the following command: mydata$x<-mydata[c("iq","education","achievement")] I'd like to look at correlations among those variables separately...

I have a data set similar to the following: Color Score RED 10 RED 13 RED 12 WHITE 22 WHITE 27 WHITE 25 BLUE 18 BLUE 17 BLUE 16 and I am trying to to select just the values of...

I am trying to reshape data that are in the wide format into the long format. The design is a repeated-measures design, which combined 3 levels of shape (circle, square, triangle) with 3 levels of color (Blue, Red, Green...