Displaying 20 results from an estimated 10000 matches similar to: "Controlling size of boxplot when it is added in a plot"
2006 Nov 08
6
Making a case for using R in Academia
Hello, new to the list, first message.
This question perhaps might be more appropriate to R-sig-teaching,
and I'd be happy to take it there if this is not the right place for it.
I am teaching applied statistics at a small liberal arts college with
limited resources, and we are currently using SPSS for our courses.
Mainly the reason for this, as I understand it, is that this is what
2007 Feb 04
4
Reading expressions from character vectors
Greetings,
I have a problem that I am sure is very straightforward, but I just
can't wrap my head around it. I've read the help pages on text,
plotmath, expression, substitute, but somehow I can't find the answer
to this simple question.
Basically consider the following example:
plot( NULL, xlim = c(0,2), ylim = c(0,2) )
expressions <- expression( -infinity, infinity )
2007 Mar 01
2
R code for "Statistical Models in S" ?
I just acquired a copy of "Statistical Models in S", I guess most
commonly known as the "white book", and realized to my dismay that
most of the code is not directly executable in R, and I was wondering
if there was a source discussing the things that are different and
what the new ways of calling things are.
For instance, the first obstacle was the solder.balance data
2007 Nov 07
3
Indexing, and using an empty string as a name
Hello all,
I ran into the following, to me unexpected, behavior. I have (for
reasons that don't necessarily pertain to the question at hand, hence
I won't go into them) the need/desire to use an empty string for the
name of a vector entry. Perhaps I did not read ?"[" very carefully,
but it seems to me that he following lines should return "1" at the end:
2007 Dec 17
3
Cannot grasp how to apply "by" here...
I have a data frame named "database" with panel data, a little piece
of which looks like this:
Symbol Name Trial Factor1 Factor2
External
1 548140 A 1 -3.87
-0.32 0.01
2 547400 B 1 12.11
-0.68 0.40
3 547173 C 1
2008 Mar 05
4
vertex labels in igraph from adjacency matrix
I am getting some unexpected results from some functions of igraph and
it is possible that I am misinterpreting the vertex numbers. Eg., the
max betweenness measure seems to be from a vertex that is not connected
to a single other vertex. Below if my code snippet:
require(igraph)
my.graph <- graph.adjacency(adjmatrix = my.adj.matrix, mode=c("undirected"))
most.between.vert <-
2007 Feb 22
1
Cross-tabulations next to each other
I have the following relatively simple problem. Say we have three
factors, and we want to create a cross-tabulation against each of the
other two:
x <- factor(rbinom(5, 1, 1/2))
y <- factor(rbinom(5, 1, 1/2))
z <- factor(rbinom(5, 1, 1/2))
table(x,y)
table(x,z)
This looks like:
y
x 0 1
0 2 0
1 1 2
z
x 0 1
0 1 1
1 2 1
I would like to get (surely this will
2008 Jan 22
1
R: determinants and inverses
hello all
sorry for the following "none" R related question.
does anyone know of a reference to calculate the following identity:
|I + ABC|
where I is an identity matrix and A, B,C may not have to be square matrices?
you help will be greatly appreciated.
H. V. Henderson; S. R. Searle
SIAM Review, Vol. 23, No. 1. (Jan., 1981), pp. 53-60.
provides a result to
2007 Dec 30
1
Histogram with different colors for different portions
Dear Rusers,
I would like to color different sections of a histogram different colors.
I have an example that was done by "brute force" given below. Has anyone
implemented something like this in general? If not, any suggestions/pointers
on how to write a general function to do so would be most appreciated.
Alan-
2008 Mar 10
3
Weighting data when running regressions
Dear R-Help,
I'm new to R and struggling with weighting data when I run regression. I've
tried to use search to solve my problem but haven't found anything helpful
so far.
I (successfully) import data from SPSS (15) and try to run a linear
regression on a subset of my data file where WEIGHT is the name of my
weighting variable (numeric), e.g.:
library(foreign)
2005 Sep 25
4
hist(x, ...) with normal distribution curve
.
I am looking for a histogram or box plot with the adding normal
distribution curve
I think that must be possible, but I am not able to find out how to do.
Regards Knut
2008 Feb 29
8
Running LaTeX dvi previewer on MacOS X
Several people have given great advice on how to successfully use X11 on
Mac to so we can use the dvi previewer to view latex() output from
Hmisc. Now after a version upgrade of X11 and X11sdk we are getting
lots of crashes. I noticed a Mac dvi previewer with an executable
stored as /Applications/TeX/TeXShop.app/Contents/MacOS/TeXShop
Can we bypass X11 problems and point Hmisc to this
2008 Jun 12
2
numbers as part of long character
Hi,
I'm looking for some way to pick up the numbers which are contained and buried in a long character.
For example,
outtree.new="(((B:1204.25,E:1204.25):7581.11,F:8785.36):8353.85,C:17139.21);"
num.char =
2007 Apr 11
1
Boxplot with quartiles generated from different algorithms
R users:
I am trying to replicate the boxplot output I achieve with Minitab in R.
I realize that R gives the user many more options on the algorithm used
to
calculate the IQR than Minitab, so I concentrated on type=6 when using
the quantile() function in R. The problem I am having is setting the
upper and
lower limit of the whisker based on the nearest actual data that should
be included.
If
2008 Jun 07
2
Using lm with a matrix?
I'm trying to do a linear regression between the columns of matrices. In
example below I want to regress column 1 of matrix xdat with column1 of ydat
and do a separate regression between the column 2s of each matrix. But the
output I get seems to give correct slopes but incorrect intercepts and
another set of slopes with value NA. How do I do this correctly? I'm after
the slope and
2008 May 23
2
About Passing Arguments to Function
Hi,
Below I have a function mlogl_k,
later it's called with "nlm" .
__BEGIN__
vsamples<- c(14.7, 18.8, 14, 15.9, 9.7, 12.8)
mlogl_k <- function( k_func, x_func, theta_func, samp) {
tot_mll <- 0
for (comp in 1:k_func) {
curr_mll <- (- sum(dgamma(samp, shape = x_func,
scale=theta_func, log = TRUE)))
tot_mll <- tot_mll + curr_mll
}
2008 Mar 09
1
Calling plot with a formula, from within a function, using ..., and xlim
I ran into a weird, to me at least, problem, and hoping someone can
shed some light into it. In a nutshell, there seems to be some
problem when one calls plot with a formula, from within another
function, using ... to pass arguments, and one of those arguments
being xlim (and only xlim shows this problem). Here is an example:
> plotw <- function(obj,...) {
+ plot(k~j,
2008 May 15
1
lattice histogram problem with integers values and nint
been puzzling over this for a day.
Summary
integer variable to use with histogram, 170,000 rows. Value is day of
year. Hist works, lattice histogram with nint does not work (spurious
spikes in display), lattice histogram using breaks=c(0:365) works
fine. Spike values appear to be sum of two adjacent bins. Want to
know if this is a familiar problem, and what the recommended
work-around is.
2007 Dec 22
2
Understanding eval
After many hours of debugging code, I came to the conclusion that I
have a fundamental misunderstanding regarding eval, and hope that
someone here can explain to me, why the following code acts as it does:
foo <- function(expr) {
eval(substitute(expr), envir=list(a=5), enclos=parent.frame())
}
bar <- function(er) {
foo(er)
}
> foo(a)
[1] 5
> bar(a)
Error in eval(expr,
2008 May 19
2
Histograms without bars
Hello
I'd like to plot a histogram of some data composed of real numbers. The
bin width I'm using is ~ 0.01, which results in high values in the y
axis, so that the area under each bar corresponds to the probability of
the data in that range.
Is is possible to plot points whose y coordinate correspond to that
probability, instead of plotting the histogram bars? In other words,
instead of