Displaying 20 results from an estimated 10000 matches similar to: "JPEG from graphs problem"
2006 Feb 28
2
jpeg and pixels
Dear R People:
When using the jpeg function for plotting,
is there a way to set the size in inches, please?
There is an option for width and height in pixels, but
not inches.
Any suggestions would be welcome!!!!!
R Version 2.2.1 Windows
Thanks in advance!
Sincerely,
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto:
2003 Apr 02
4
Multivariate Time series
Dear R People:
Is there a library for Multivariate time series, please?
For some reason, I'm thinking that Dr. Paul Gilbert may have one?
R Version 1.6.2 (i've updated!) for Windows
Thanks so much!
Sincerely,
Erin Hodgess
University of Houston - Downtown
mailto: hodgess at uhddx01.dt.uh.edu
2002 Feb 22
3
Cent. Mov. Ave
Dear R People:
Here is an interesting question(I think)
Suppose I want to calculate Centered Moving Averages; i.e.
x[1] <- ( sum(y[1:12]) )/12
x[2] <- ( sum(y[2:13]) )/12
and so on.
Of course, this is easily done through loops. However, I have
been trying to do this more elegantly, but have failed. I have
tried things like
j1 <- 1:109
j2 <- 12:120
x[1:109] <- ( sum( y[j1:j2])
2000 Oct 26
3
Tick marks for abline
Dear R People:
I am drawing graphs for a College Algebra class. I would like to have
the x and y axes, along with the lines that I am plotting. So I leave
off the axes, and use xlim and ylim. Then I add my abline(v=0).
However, I would like to have tick marks on the abline. How would I do
that, please?
Thanks in advance!
Sincerely,
Erin M. Hodgess, Ph.D.
Associate Professor
Department of
2001 Jun 21
2
Durbin Watson stat for ser. corr
Dear R People:
Do any of the linear model or regression function calculate the
Durbin-Watson test statistic for serial correlation, please?
I found the hat matrix, studentized residuals, and so on,
but no D-W.
Thanks so much!
Sincerely,
Erin M. Hodgess, Ph.D.
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
One Main Street
Houston, TX 77002
2000 Jul 12
1
function via source or fix
Hello R People:
Suppose I create a function, x.e, via the fix command:
> x.e <- fix(x.e)
When I type in x.e, the function code appears, along
with the name/number of the environment.
However, if I create a function, y.e, and source it in, when
I type in y.e, the function code only displays(no
environment).
Why is this, please? (It's not a bug....I just wondered).
I am using
2002 Oct 28
1
Nonlinear time series
Dear R People:
Is there code for nonlinear time series available, please?
I'm looking for something that could also provide a model for
forecasts.
This is for R V1.5.1 on a PC.
Thank you very much in advance!
sincerely
Erin Hodgess
mailto: hodgess at uhddx01.dt.uh.edu
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2003 Jan 05
1
Long memory ts
Dear R People:
Where is the command for long memory time series, please?
In S, it's arima.fracdiff
Is there something like that in R? If so, which library has it, please?
Version 1.5.1 for Windows
Happy new year
Thanks so much!
Sincerely,
Erin Hodgess
mailto: hodgess at uhddx01.dt.uh.edu
2002 Mar 11
3
Crime Time Series
Can anyone please recommend a good site for
crime related time series?
Thanks!
Erin
mailto: hodgess at uhddx01.dt.uh.edu
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2002 Aug 10
2
fractals
Dear R People:
Does anyone have any code for Fractals, chaos,
or anything like that, please?
This is strictly for demo purposes...decorative only.
This is R version 1.5.1 for Windows.
Thank you in advance!
Have a great weekend!
Sincerely,
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
1 Main Street
Houston, TX 77002
2002 Apr 19
2
exponential smoothing
Dear R People:
Is there a function for exponential smoothing, please?
R version 1.4.1 for Windows.
Thanks in advance! Have a great weekend!
Sincerely,
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
1 Main Street
Houston, TX 77002
mailto: hodgess at uhddx01.dt.uh.edu
2000 Aug 31
3
make problem
Dear R People:
I have the source for R version 1.1.1
on a UNIX system alpha-dec-osf4.
The ./configure works fine.
When I do the make, it works fine until it tries to build the
package tcklc.
I get an error of
Tk_Saf_Init not identified
Then it kicks out.
Any suggestions, please?
Thanks!
Sincerely,
Erin M. Hodgess, Ph.D.
Associate Professor
Department of Computer and Mathematical Sciences
2000 Jul 12
1
buglet in fix() [was "function via source or fix"] (PR#602)
>>>>> "Erin" == Erin Hodgess <hodgess@uhddx01.dt.uh.edu> writes:
Erin> Suppose I create a function, x.e, via the fix command:
(ESS users ESS don't ever do this, but still ...)
>> x.e <- fix(x.e)
Erin> When I type in x.e, the function code appears, along
Erin> with the name/number of the environment.
Ok, in the above it was
2002 Oct 01
1
High Frequency Time Series
Dear R People:
I have a weekly time series. How do I put this into the
ts command, please?
That is, what do I use for frequency, please?
R version 1.5.1 for Windows.
Thanks in advance.
Sincerely,
Erin
mailto: hodgess at uhddx01.dt.uh.edu
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2002 Jun 22
1
quality control pkg?
Dear R people
is there a module for quality control, please?
X bar charts, and such?
perhaps a contributed package?
Thanks in advance!
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
1 Main Street
Houston, TX 77002
mailto: hodgess at uhddx01.dt.uh.edu
2002 Jan 23
1
No subject
Dear R People:
Here is a very simple question, please:
I have a data frame with the state name, state division, and population.
Note: state division is something like Atlantic, Mountain, etc.
I want to produce a table with the state division and the total of the
populations for the states within that division.
I've been messing with "table" but so far, no luck.
This is R1.3.1,
2003 Jun 12
1
bootstrap question
Dear r People
I have a bootstrap question, please.
(this may possibly be a problem with my understanding of the bootstrap)
Suppose I have a sample of size 15, x[1], ...x[15].
This is a sample which is small compared to the population.
by the way, the x[i] are iid and have a common distribution F.
As I understand the bootstrap, that function will take a user specified
number of repititions.
2001 Jul 23
1
Non R probability question
Dear R People:
Here is a non-R probability question, please:
There is a problem, originally posed from an American game show,
called "Let's Make a Deal."
A contestant makes a selection of one door, from Doors 1 through 3.
He or she knows that there are 2 goats and 1 car behind those doors.
Once the contestant makes the selection, say Door 2, then the host,
Monty Hall, tells him
2002 Jan 24
1
RE:
Hello,
Although your message is not very explicit about the structure of your data
frame,
I think you can get what you want by using a combination of the function
"split" and
the "apply" functions family: apply, lapply and sapply.
If you provide a more detailed organization of your data frame, perhaps we
can give
to you a more wiser advice.
Thanks,
Carlos.
P.S: By the way,
2001 Oct 13
2
hist and normal curve
Dear R people:
I would like to superimpose a normal curve on a histogram.
I've seen this example in a book, somewhere.
I know that you draw the hist, get the mean and sd
of the data set, but then I'm stuck.
Could you help, please?
Thanks!
Erin
hodgess at uhddx01.dt.uh.edu
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