What code.
Also, the forum has a "no homework" policy. Your subject implies this is
homework, so you might not get any answers. You might get a hint or two
though.
On Aug 10, 2014 10:00 PM, "michelle maurin" wrote:
> I think my code is very close I can seem to be able to debug it Might be
> some
We can try, but we're not going to be able to do much without the code
being pasted in the email. -- H
On 10 August 2014 19:08, michelle maurin wrote:
> I think my code is very close I can seem to be able to debug it Might be
> something very simple I know the problem is on the last 3 lines of
I think my code is very close I can seem to be able to debug it Might be
something very simple I know the problem is on the last 3 lines of code can you
please help?
Thanks
Michelle __
R-help@r-project.org maili
Well, it says that it's from Hadley Wickham.
https://github.com/hadley/adv-r
This is code and text behind the Advanced R programming book.
The site is built using jekyll, with a custom plugin to render .rmd
files with knitr and pandoc. To create the site, you need:
jekyll and s3_websiter gems:
On Sun, Aug 10, 2014 at 1:51 PM, Grant Rettke wrote:
>
> Good afternoon,
>
> Today I was working on a practice problem. It was simple, and perhaps
> even realistic. It looked like this:
>
> • Get a list of all the data files in a directory
OK, I assume this results in a vector of file names in a
Err... sorry... you have to use do.call with base rbind as David illustrates. I
am spoiled by rbind.fill from the plyr package. rbind.fill accepts the list
directly and also fills in any missing columns with NA, which avoids having to
dig through all the files to find any oddballs.
-
On Aug 10, 2014, at 11:51 AM, Grant Rettke wrote:
> Good afternoon,
>
> Today I was working on a practice problem. It was simple, and perhaps
> even realistic. It looked like this:
>
> • Get a list of all the data files in a directory
> • Load each file into a dataframe
> • Merge them into a si
Dear Josh and Elizabeth,
Josh suggested one way of doing it with the psych package. As of today, the
psych package (version psych_1.4.8) , I have included a new function (faBy)
that will work with the statsBy function to do EFA for each of multiple groups.
Basically, it just calls the statsBy
Dear Thanoon,
You might look at the various item simulation functions in the psych package.
In particular, for your problem:
R1 <- sim.irt(10,1000,a=3,low = -2, high=2)
R2 <- sim.irt(10,1000,a=3,low = -2, high=2)
R12 <- data.frame(R1$items,R2$items)
#this gives you 20 items, grouped with high c
Just load the data frames into a list and give that list to rbind. It is way
more efficient to be able to identify how big the final data frame is going to
have to be at the beginning and preallocate the result memory than to
incrementally allocate larger and larger data frames along the way usi
Good afternoon,
Today I was working on a practice problem. It was simple, and perhaps
even realistic. It looked like this:
• Get a list of all the data files in a directory
• Load each file into a dataframe
• Merge them into a single data frame
Because all of the columns were the same, the simpl
I don't make a chart with 1000 colors. I allocate 1000 colors for 1000 iterms
and then, the selected items based on a criterion will get a color out of 1000.
Thanks
On Friday, August 8, 2014 4:38 PM, David L Carlson wrote:
I would suggest not using pie charts and not trying to make 1000 c
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