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 runn
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.
https://stat.ethz.ch/pipermail/r-help/2003-Januar
hort.
Any assistance on this non-hw problem would be appreciated.
Sincerely,
Katrina
On Thu, Apr 19, 2012 at 4:34 AM, David Winsemius 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 as
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 mi
Yes, that worked for me. Thank you.
On Mon, Nov 28, 2011 at 10:16 PM, David Winsemius wrote:
>
> 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
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 provide
dummy subset value I was using 900m but I 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 wrote:
> Hi David and Jim!
>
>
the below try.
sapply( if (cdem < 900)] function(x) get("t.mean.1.c") - (x * -0.0065)
else function(x) 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
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 orig
ri, Nov 18, 2011 at 6:02 AM, Gabor Grothendieck wrote:
> On Thu, Nov 17, 2011 at 4:40 PM, Katrina Bennett
> 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 derivative.
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
sca
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,
reorg(x)))
>
> You may need to tweak a bit to fit exactly what you want.
>
> Weidong Gu
>
> On Fri, Aug 12, 2011 at 2:35 AM, Katrina Bennett wrote:
>> Hi R-help,
>>
>> I am working with US COOP network station data and the files are
>> concatenated in si
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 d
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.
***
for your assistance!
Katrina
On Fri, Aug 5, 2011 at 4:41 PM, Katrina Bennett wrote:
> 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)
&g
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
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 w
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 af
need to be applied appropriately!
Thank you,
Katrina
On Thu, Apr 14, 2011 at 12:26 AM, Achim Zeileis
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 S
ning messages:
1: In which(in.index & all.indexes >= start & all.indexes <= end) :
Incompatible methods ("Ops.POSIXt", "Ops.Date") for ">="
2: In which(in.index & all.indexes >= start & all.indexes <= end) :
Incompatibl
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.
# Read in the station list
stn
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