I am running caret for model exploration. I developed my code a number of
months ago and I've been running it with no issues. Recently, I updated my
version of caret however, and now I am getting a new error. I'm wondering
if this is due to the new release.
The error I am getting is when I am
Hi all,
I would like to find the x position of an two asymptotes.
Here is a sample of what I would like to do:
x - seq(1, 153,, 153)
a - 85
m - 65
s =-1.5
fn - function (x, a, m, s) { a * (exp((m - x)/s) * (1/s))/((1 +
exp((m - x)/s)))^2 }
plot.deriv1 - fn(1:153, a, m, s)
I can find the
be appreciated.
Sincerely,
Katrina
On Thu, Apr 19, 2012 at 4:34 AM, David Winsemius dwinsem...@comcast.net wrote:
On Apr 19, 2012, at 4:41 AM, Katrina Bennett wrote:
Hi all,
I would like to find the x position of an two asymptotes.
Here is a sample of what I would like to do:
x - seq(1, 153,, 153
Dear R Help,
Sorry I wasn't more clear before. Here is another crack at this.
What I am still trying to do is estimate the point on a line when the
slope changes or asymptotes. I have found some similar postings
talking about this but no answers.
Yes, that worked for me. Thank you.
On Mon, Nov 28, 2011 at 10:16 PM, David Winsemius dwinsem...@comcast.netwrote:
On Nov 29, 2011, at 1:08 AM, Katrina Bennett wrote:
I'd like to sum a matrix only where the matrix meets a specific condition.
The matrix has 365 rows and about 50,000
) get(t.mean.1.c) + (x * -0.0065) )
Finally, I want to output everything into one single matrix array.
I hope that is more clear.
Thanks for your assistance.
Katrina
On Sun, Nov 27, 2011 at 7:35 PM, David Winsemius dwinsem...@comcast.netwrote:
On Nov 27, 2011, at 10:15 PM, Katrina
switched it
in my example to my actual value (since I am going to use 300m for this
initial attempt at this). I will need to make it a lot more complicated
eventually!
On Mon, Nov 28, 2011 at 6:57 PM, Katrina Bennett kebenn...@alaska.eduwrote:
Hi David and Jim!
Thanks very much for your help
I'd like to sum a matrix only where the matrix meets a specific condition.
The matrix has 365 rows and about 50,000 columns.
str(cdem.mat.yr)
num [1:365, 1:41772] -43.5 -48.4 -45.9 -38.4 -32 ...
I'm having trouble replicating this because it is not working out for me,
so I'm unsure I can
Hi all,
I'm working to apply a function that will generate a matrix of results only
when a specific criteria is met.
I want my final results to be a matrix with both the values that meet the
criteria (the results of the function), and those that to do in the same
positions in the matrix (the
, 2011 at 6:02 AM, Gabor Grothendieck ggrothendi...@gmail.com
wrote:
On Thu, Nov 17, 2011 at 4:40 PM, Katrina Bennett kebenn...@alaska.edu
wrote:
Hello, I am wondering if someone can help me. I have the following
function
that I derived using nls() SSlogis. I would like to find its
Hello, I am wondering if someone can help me. I have the following function
that I derived using nls() SSlogis. I would like to find its derivative. I
thought I had done this using deriv(), but for some reason this isn't
working out for me.
Here is the function:
asym - 84.951
xmid - 66.90742
scal
I have a zooreg object and I want to be able to generate a value for seasons
and 11-day composites paste it onto my zoo data frame, along with year,
month and days.
Right now I have the following to work from:
eg. dat.zoo.mdy - with(month.day.year(time(dat.zoo)), cbind(dat.zoo, year,
month, day,
On Fri, Aug 12, 2011 at 2:35 AM, Katrina Bennett kebenn...@alaska.edu wrote:
Hi R-help,
I am working with US COOP network station data and the files are
concatenated in single rows for all years, but I need to pull these
apart into rows for each day. To do this, I need to extract part of
each
Hi R-help,
I am working with US COOP network station data and the files are
concatenated in single rows for all years, but I need to pull these
apart into rows for each day. To do this, I need to extract part of
each row such as station id, year, mo, and repeat this against other
variables in the
Hi Petr, thanks for your help on this. I will most definitely get this
book as it appears to be a good one.
I am happy with how nls() and the self starting function appears to be
fitting the data set.
What I am wondering about is how to write out this function outside of R.
For example, if I sat
Hi R help,
I am trying to determine how nls() generates a function based on the
self-starting SSlogis and what the formula for the function would be.
I've scoured the help site, and other literature to try and figure
this out but I still am unsure if I am correct in what I am coming up
with.
Hi Petr,
Thank you for the response.
I am not familiar with the nls package. I am interested in obtaining a
function to represent the relationship observed in dat over x.seq (days)
so that I can calculate a minimum and maximum of the function.
In the example below, it seems like you are using a
On Fri, Aug 5, 2011 at 4:41 PM, Katrina Bennett kebenn...@alaska.eduwrote:
Hi Petr,
Thank you for the response.
I am not familiar with the nls package. I am interested in obtaining a
function to represent the relationship observed in dat over x.seq (days)
so that I can calculate a minimum
Hello, I'm trying to generate a sine wave in R to fit my observations using
the general formula:
y=a*sin(b[x+h*pi)]+k
where a = amplitude, b=period, h=phase shift, and k=vertical shift
I want to use following translation to bring the sine function up onto the
y-axis to range from 0-1, and this
Hi, I'm installing rgdal but I keep having failures because I have not been
able to find a good source of information for the correct configuration
settings when installing GDAL.
My error from the R install.packages(rgdal) is below.
Can someone point me to a good source to tell me how to set
all.indexes = end) :
Incompatible methods (Ops.POSIXt, Ops.Date) for =
2: In which(in.index all.indexes = start all.indexes = end) :
Incompatible methods (Ops.POSIXt, Ops.Date) for =
Why is this happening?
Thanks for your help.
Katrina Bennett
__
R
to be applied appropriately!
Thank you,
Katrina
On Thu, Apr 14, 2011 at 12:26 AM, Achim Zeileis
achim.zeil...@uibk.ac.at wrote:
On Wed, 13 Apr 2011, Katrina Bennett wrote:
Hello, I have a following time series data
head(mend.dat)
ID PARAM Year Month Day Value SYM
1 15052500 1 1965 5 15 128
Hello, I'm trying to develop a box plot of time series data to look at the
range in the data values over the entire period of record.
My data initially starts out as a list of hourly data, and then I've been
using this code to make this data into the final ts array.
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