Hello
I've been asked to help evaluate a vegetation data set, specifically to
examine it for community similarity. The initial problem I see is that the
data is ordinal. At best this only captures a relative ranking of
abundance and ordinal ranks are assigned after data collection.I've
Thanks Phil,
I'll do so now.
Much appreciated.
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Hi,
This is a question regarding technique rather than an R specific issue. I
have been asked to evaluate a 30+ year long term continuous survey of bird
presence/absence data that has an associated ocular estimate of the
vegetation community percent coverage. The data are organized by
Hello
I recently upgraded from 2.11.1 to 2.12.0 on a windows machine. When I
launch R via TINN - R,(2.3.7.0) most things appear correct. The exception
is the path to the library.
I store all of the packages in C:\Program_Files \R\R-2.12.0\library
Last week when I upgraded I rec'd an error:
try lower.tri
and see
??lower.tri
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Hello
I'm working with a bunch of time series data. The data are downloaded from
a server and stored as ascii files prior to reading them into R.
After reading the data sets read into R with no problem and I can us the ts
function to coerce them to time series, sometimes this works and
You are going to have to subset the necdf dataset by dates or some other
logical aggregation scheme, and then plot.
Since the data is spatial, I would think that plotting could be achieved
with the image( ) function.
Good Luck
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and
Hello,
I've tried to install randomForest on a Ubuntu 8.04 Hardy Heron system.
I've repeatedly rec'd the error:
install.packages(randomForest, dependencies = TRUE)
ERROR: compiliation failed for package 'randomForest'
** Removing '/home/admuser/R/i486-pc-linux-gnu-library/2.6/randomForest'
I'm working with the randomForest package and have successfully build a
model. I'd like to go one step further however, and use the output from
the model to construct a map using the output. My input data are spatial,
and I have an independent set of rasterize maps for each of the predictor
Hello,
Here is a general question that I think many of you will have insight to.
I have 40 independent dataframes. Each has a dimension of 1359 x 15. For
example
dim(meanAnnualWaterDepth)
1539 15
I need to calculate the average value for each dataframe but only for
columns 7: 15. I can do
A colleague is interested in modifying the ylim definition for individual
panels of a common bwplot plotting statement.
Is there an approach to modifying the bwplot function to allow for a
dynamic ylim range given different panel factors ?
He is using R 2.6.2 on a Linux distribution running
Hello
I have a Linux machine (Ubuntu 8.04 hardy, Gcc version 4.2.4
(i486-linux-gnu) currently running R 2.6.2. I'd like to upgrade to 2.10.
First Question): What is the appropriate way to remove the old version of
R?
Part 2.
After downloading r-base_2.10.0.orig.tar.gz and opening the
Ok, that seems to work. Thanks for the help.
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
A few years ago, I work with Stuart Gage who had developed a Heat /
Precipitation Index as a measure of drought severity. It works just as
well if not better than the Palmer Drought Index.
You can find the formula in this only pdf report: Climate Variability in
the North Central Region:
Hello,
vegMeans - by(SoilVegHydro[3:37] , SoilVegHydro$Physiogomy, mean)
vegSD - by(SoilVegHydro[3:37] , SoilVegHydro$Physiogomy, sd)
write.table(vegMeans,
file=A:\\Work_Area\\Steve\\Hydrology_Data\\data\\vegMeans.txt)
Error in as.data.frame.default(x[[i]], optional = TRUE, stringsAsFactors
Hello,
I would like to produce a series of graphs comparing the probability
distributions for 8 factors against a continuous metric.
The kind of graph I'm hoping to produce would look like the density
comparison graphs (library sm) using the function sm.density.compare.
However, instead of
Hello,
I'd like to automate this script a bit more and cycle several
parameters(both the species and the metric). For example where AnnualDepth
occurs, I need to process about 12 metrics so instead of writing this
entire script 12 times once for each metric I'd like to be able to
automatically
The ctree function (package party) provides a method for running
conditional inference trees. Plotting results of ctree returns a binary
map of the tree and for each terminal node a barplot of the probabilities
of the response categories.
For example:
iris.ct - ctree(Species ~ . , data =
Hello,
This is a re-submittal of question I submitted last week, but haven't rec'd
any responses.
I need to extract the probabilities used to construct the barplots
displayed as part of the graph produced by plot(ctree).
For example,
library(party)
iris.ct - ctree(Species ~ . , data = iris)
Joris,
Thank you, your solution did what I needed.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Hello
Trying to develop variograms and kriged surfaces from a point file. Here is
what I've done so far.
library(gstat) # also loads library(sp)
library(lattice)
soilpts$x - soilpts$UTM_X
soilpts$y - soilpts$UTM_Y
soil.dat - subset(soilpts, select=c(x, y, Area, BulkDensity, LOI, TP, TN,
Please disregard. I've posted to the wrong site.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
hello,
I am trying to develop a triangle plot but am having difficultly assigning
the row.names to the 3 columns in the data.frame
Here is what I've done,
attach(SoilVegHydro)
dim(SoilVegHydro)
129239
# now take 3 variables from main data.frame for plotting
dat - cbind.data.frame(TP,
Hello,
I've been using ctree and have developed a 55 node - 28 terminal solution.
As can be imagined, the plot is difficult to travel down each of the major
branches.
I've read the help files for ctree I saw where terminal nodes can be color
coded.
plot(airct, type = simple)
plot(airct,
Hello,
I am searching for a method to calculate a normal distribution.
For example this equation is used to calculate the normal curve when the
mean and standard deviation are know.
p(x) = (1/σ*sqrt(2π)) x exp (- (x-μ)2/2σ2)
or
(Embedded image moved to file: pic27350.jpg)Normal Probability
Whats wrong with Power Point or anyone of its equivalents?
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
I have just upgraded from 2.9.2 to 2.10.1 on my XP machine.
I rec'd the following error message:
Error in strsplit(x[ok], [.-]) :
5 arguments passed to .Internal(strsplit) which requires 6
I also tried update.packages(checkBuilt=TRUE, ask = FALSE)
update.packages(checkBuilt=TRUE,
Kevin
This function is very valuable to me as well. Can you explain what the
function is looking for with regards to the arguments sheet and condition?
Thanks
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead,
Hi everyone,
I am trying to construct a glm and am running into a couple of questions.
The data set I am using consists of 6 categories for the response and 6
independent predictors representing nutrient concentrations at sample point
locations. Ultimately I'd like to use the probabilities for
I've been working on a multinomial logit model, trying to predict
vegetation types as a function of total phosphorus. Previous responses to
my postings have pointed me to the mlogit package. I'm now trying to work
examples and my data using this package.
data(Fishing, package = mlogit)
Fish -
Without know what your data set really looks like, I'd look to decision
trees - specifically package rpart and use method = classify.
Your problem may not be appropriate in that environment, but it is hard to
say with limited explanation of issues.
good luck
Steve Friedman Ph. D.
Spatial
Achim - Everyone
Yes, I did exactly as you've suggested. I did the analysis over on both my
windows XP machine and on my Linux machine.
It worked correctly. I don't recall which other packages I installed the
first time, but there was a conflict.
Thanks you for the attention and the great
Hello All,
When I use the following lines of code to create a plot and add labels
with R-square values the labels have a superscripted R2.
library(lattice)
xyplot(PropHatchedNests$Phatched + PropHatchedNests$PropNests +
PropHatchedNests$meanHSI + PropHatchedNests$RelMeanEggsNest ~
Hello
I am fortunate (or in really big trouble) in that the research group I work
with will soon be receiving several high end dual quad core machines. We
will use the Ubuntu OS on these. We intend to use this cluster for some
extensive modeling applications. Our programming guru has
Hello
I'm working with a large hydrological data set stored in a netCDF format.
The file stores x and y coordinates in the UTM projected coordinate system,
yet when I use image to graphically display the z variable, the image is
distorted in the sense that it does not plot the map in the correct
Gabor,
These options will work just fine. Thank you
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
My Linux installation of R is x86_64-redhat-linux-gnu-library
When I tried to write a tiff file the system responded that tiff was not
supported with this version.
Which version of R on a linux environment does support tiff graphic files ?
Thank you
Steve
Steve Friedman Ph. D.
Spatial
Feilipe,
You should look at the RODBC package
It works great !
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
I thought I mimicked the coded correctly, but find an error/omission
somewhere in the xyplot function shown below.
eggs # alligator egg fate
dput(round(eggs, 2), file = )
structure(list(Year = c(1985, 1986, 1987, 1988, 1989, 1990, 1991,
1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000),
David and the list
Yes the graph is produced with the code I submitted. However, I was not
clear in my initial post. and it is totally my mistake for taking up
everyone's valuable time.
My main question focuses on the key which prints in black as opposed to
using the colors (black, red and
I'm working with Lattice graphics and I would like very much to color code
the auto.key fill color with the same corresponding colors that I use in
the panels. I've looked on the web for clues, and on the CRAN-R help sites
searching on trellis auto.key color and variations, unfortunately the
Sundar,
Thanks for the assistance.
Much appreciated.
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Greetings
I have encountered a situation with regards to plotting barcharts with
associated error bars. My search for clues on how to accomplish this
turned up some interesting information. Basically, I found that including
error bars with barplots is not desirable and hence there appears that
Shame on you!
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Wacek raises a very valid perspective. I have previously not responded to
these requests, and I've seen a bunch. I have thought they were a waste of
my time to respond to. In the future I think I'll simpy disregard these
requests, because I simply can not crystal ball the true needs of the
I'd like to annotate an xyplot with an R^2 value, but can not find the
syntax to define the superscript format for the text.
I'd appreciate suggestions,
xyplot(SharkSloughEggs.df$Sharkeggs.rel +
SharkSloughEggs.df$SharkHatched.rel + SharkSloughEggs.df$SharkFlooded.rel +
HSI.shark$MEAN ~ Year,
Eric,
The error suggests that the file has an inconsistent number of
attributes. You should inspect the file to make sure that each line has
the same number of expected attributes (columns). If one or more is
missing, it suggests that the data collection process from the Palm Pilot
is not what
Gabor's solution has worked very nicely.
Thank you very much.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Look to the glm function then pass the output to the step function
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
I note that someone asked for help a few weeks ago regarding the ability to
drop empty panels on an xyplot.
I did not see a reply to that inquiry so I am asking for assistance with
the same problem
To prepare the data for the plotting routine, I did the following to
restrict the content of the
Chapter 10 A Twentieth-Century Tour of Categorical Data Analysis in
Agresti's smaller book with this title An Introduction to Categorical Data
Analysis includes this history.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
I'm moving my R applications to a Redhat OS and want to install ESS.
My sys admin has downloaded the rpm (emacs-common-ess-5.3.8-1.fc8.src.rpm),
but when he tried to do the install he rec'd a number of warnings. We are
not sure if the warnings are telling us that the installation did not occur
Hello.
I'm working on a windows XP machine with R 2.8.1
I'm working with lattice and I don't understand how to set the size of the
text for the labels. Can anyone suggest a solution?
I'm establishing a melted dataframe first and then setting a key and
calling the plot as follows;
Hello, this is a request for assistance that I submitted earlier, this time
with the dataset. My mistake for taking up bandwidth. I've also rephrased
the question to address an additional concern.
I'm working on a windows XP machine with R 2.8.1
1). I'd like a barchart (or other lattice type
Hello,
I work with Windows XP and do what you are hoping to do. Instead of using
the built in script dialogue editor I use TINN-R. I can drag either this
editor or the R Console to different monitors. I often have to make sure
that the TINN-R editor panel is not maximized as that will hide any
I am using windows XP with R 2.8.1
I am generating a lattice plot of annual rain patterns using the following
function:
xyplot(rain.stats$min+ rain.stats$max + rain.stats$ave ~
rain.stats$month |rain.stats$year,
lty = 1, data = rain.stats, type = c(l,l, l), col =
c(red, blue,
Sundar,
Your suggestion to convert year to a factor worked like a charm.
Thank you very much.
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
I tried the example in ggplot as well and rec'd the same error message.
ggpoint is not found in the ggplot2 library.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office
If someone can explain this odd behavior I'd appreciate it.
I have a data.frame Cell.ave (attached and created via dput(Cell.ave,
Cell.ave)
which contains three columns of parameters year, month and AveRain.
I need to subset the data.frame by months such that
DrySeaonMonths are 1,2,3,4, 11,
My apologies for sending a binary file. I was following advice from
someone (from this list) who insisted I send data via dput. I guess that
is frown upon.
Anyway. here is a Cellave.txt file.
Stavros, here is the output following your suggestion.
WetMonths - Cell.ave[Cell.ave$month = 5
good morning
This question is not a stats question per say but a data management and
lattice plotting problem. I apologize now if I'm asking an inappropriate
question to this gracious group.
I'm need to bring in approximately 100 *.dbf files into R but I'm having
difficultly understanding
Duncan,
Thank you very much. I did not have a chance to examine this approach
today. I will because I need to have this functionality.
I appreciate you time and insights
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd
Hello
I'm plotting a large suite of barcharts and need to modify the size of the
text for both the yaxis and xaxis labels.
I've tried using the following:
trellis.par.set(list(par.ylab.text = list(cex = 0.65)),
trellis.par.set(list = par.xlab.text = list(cex = 0.65
On inspection,
Sundar,
Thank you very much. I see my mistake. Much appreciated.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
My data contains a variable observation_date and it contains values as:
1985-09-02
1985-09-15
1985-07-31
1985-09-02
I need to process data annually rather than daily, therefore I'm trying to
1) either extract the first 4 digits from this field and use them as a new
variable year or 2) keep
Hello
I'm running into a variety of limitations with my computer complaining that
it doesn't have sufficient memory. It is a Dell Latitude D630 Duo Core
CPU T7700 @ 2.40 GHz, with 3.50 GB RAM.
I'm working with relatively large dataframes
dim(AllYears)
returns 4071840 records with
Thanks for the gracious assistance in advance
I'm working on a non-metric scaling problem and am calculating the distance
for input to isoMDS
Here is the code
library(MASS)
vegdata - tapply(Percent, list(PRIMARY_VE, MASTERID), sum)
x.mat - matrix(x, nrow=40, ncol=2750, byrow=TRUE, dimnames =
I agree with Bert,
The R user group lists should not be a vehicle for private commercial
vendors.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
Office (305) 224 - 4282
[EMAIL PROTECTED]
Paul,
Look for the An Introduction to R on the CRAN - R web site. The latest
version, as far as I know, is Version 2.7.2 (2008-08-25). You might also
want to examine the R Data Import/Export doc
Both can be found here : http://cran.r-project.org/doc/manuals.html
Steve
Steve Friedman Ph. D.
Doesn't use of a 95% CI of the mean give you a better handle on this issue.
It then might be interesting to compare the CI range with the values
obtained by the fitdist function.
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd
Hello,
I am working with version 2.7.2 on a PC and have 2.8.0 available, but have
not upgraded completely yet.
I have 6 species for which I've run 6 unique environmental management
scenarios against for comparison purposes. Each scenario is run for 36
years (1965 - 2000). Some of the species
Hi again,
Yes you are right I should have included an example of the file
It looks like this after reading in the data and using tapply I arrive at
the following
Alt5rimc_mean
A B C D E F
1965 8.423645 0.208 1.6296296 0.000
Hello everyone
I'm working with R 2.8.1 on a windows machine
I have a question regarding time series analysis
The first question is how does R expect the input file to be structured?
I'm working with a *.txt file similar to the abbreviated one here:
Date,stage
4/2/1953,7.56
4/3/1953,7.56
I know this has been addressed before, but I'm still confused by the
solution.
When running TINN - R (ver 2.1.1.6) with R (2.8.0) I have lost the
functionality of TINN-R
It returns an error
source(.trPaths[5], echo=TRUE, max.deparse.length=150)
I modified the RProfile.site file as follows:
Hello
I'm encountering some difficulty correctly reading binary files. The binary
files store data as short rather than double , int, or any of the
other modes of the vector being read.
The data represents a regular grid of size 419 rows by 264 columns, to make
it more interesting, the data
Does anyone else have any insights to this issue:
Henrick, thank you for your very quick response. I've examined the readBin
help file with respect to endian and I'm still not sure I'm getting this
correct.
Here is what I'm coding:
con - file(file.choose(), open=rb)
Year66 - readBin(con,
Hello,
I'm writing a variety of R scripts and want to code the loadhistory and
workspace from within the script. I found the loadhistory function but do
not see a comparable function for load workspace. Is there one ?
Working with R 2.8.1 (2008-12-22) on a windows platform.
Thanks for any
Hello,
Running R 2.8.1 (2008-12-22) on Windows.
I running a series (25) of clustering procedures using the hclust function
and would like each of the plots to have the same yaxis label and scale in
all of the plots.
Is there a procedure to change the scale on these plots? Or is there an
I'm very interested in the bigmemory package for windows 32-bit
environments. Who do I need to contact to request the Beta version?
Thanks
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
I am lucky and am now working with a new Redhat Linux 64-bit OS
But I am getting the following error can anyone provide some graciously
needed assistance:
[r...@bluebird system-files]# rpm -i R-2.8.1-1.rh5.x86_64.rpm
warning: R-2.8.1-1.rh5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID
It seems that you have 900 files with the same parameters in each file (I
might be reading more between the lines here than you inferred). However if
this is the case, why not import each of the files into a common database
and then link the database using ODBC connectivity options. If that is
Look here to start.
http://www.r-project.org/doc/bib/R-books.html
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Hello,
Last week I installed ver 2.9.1 and it worked fine. This morning I have
been working on some simple schemes,
plot(PropHatchedNests$Phatched, PropHatchedNests$MEAN)
abline(lm(PropHatchedNests$Phatched, PropHatchedNests$MEAN))
This oddly produces a box and whiskers plot.
I uninstalled
Kevin,
I did the same installation a week or two ago. The same downloading
process occurred, but not so many iterations. I don't know if it was
normal or not , but the system seems to work very well.
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National
I have rec'd the following error:
P34annual -
read.table(A:\\Data\\Output\\Sparrow\\Hydro_Data\\P34_Annual.txt,
header=TRUE, sep=,, stringsAsFactors= FALSE, skip=1)
P34annual$GS - rep(1.86, dim(P34annual)[1])
P34annual$Depth - as.numeric(P34annual$P34_stage) -
as.numeric(P34annual$GS)
RStudio is a new interface. I just started using it and find it very good.
You might want to check it out. It does have Ubuntu capabilities, but you
have be sure that your graphic drivers are the same as is specified in the
RStudio system.
Hope this helps
Steve Friedman Ph. D.
Ecologist /
I'm stumped, can anyone find my error in this sequence.
for(j in 1:(varsize[4]-1))
temp - get.var.ncdf(nc=input,
varid=p_foraging,c(1,1,j),c(varsize[1],varsize[2],1))
filled.contour(x, y, temp, color = terrain.colors,
plot.title = title(main = paste(Everglades Wood
Hi Peter,
Thanks for taking the time to consider the problem. I realize the procedure
is not reproducible. I use a 4 dimensional netCDF file (4.2 GB) in size to
pull data into this process. Nobody in their right mind should work with
such things. It's a spatial temporal database with 10 years of
Hi Peter,
Thanks for taking the time to consider the problem. I realize the procedure
is not reproducible. I use a 4 dimensional netCDF file (4.2 GB) in size to
pull data into this process. Nobody in their right mind should work with
such things. It's a spatial temporal database with 10 years of
Look at the merge command
?merge
Steve Friedman Ph. D.
Ecologist / Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
I am trying to invoke an in house developed java program from R and am
running into some confusing issues.
I've written this function:
DoNormalSkew - function() {
.jaddClassPath(U:/development/software/untilities/ELVeSkew/dist/ELVeSkew.jar)
I'm generating several scatter3d visualizations of vegetation community
distribution against a number parameters using the scatter3d function car
package,
The visualizations are fantastic and they provide great support for the
analysis. As far as I can determine, scatter3d does not save the
I am also finding the link between TINN - R (2.3.7.0) and R (2.12.0 2010
- 10 - 15) to be problematic.
source(.trPaths[5], echo=TRUE, max.deparse.length=150)
Error in source(.trPaths[5], echo = TRUE, max.deparse.length = 150) :
object '.trPaths' not found
Steve Friedman Ph. D.
Ecologist
Explore the ModelMap package. It might offer some useful tools for your
application.
Steve Friedman Ph. D.
Ecologist / Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax
Try the glm package
Steve Friedman Ph. D.
Ecologist / Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
Hi,
I need to create a plot (type = h) and then overlay a skewed-normal
curve on this distribution, but I'm not finding a procedure to accomplish
this. I want to use the plot function here in order to control the bin
distributions.
I have explored the sn library and found the dsn function.
Why don't you just download the latest release from CRAN - R. It is the
recommended approach to installing R.
Steve Friedman Ph. D.
Ecologist / Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
This is a elementary problem concerned with tests of association. You
should read up on categorical statistics, chi square tests, and general
linear models.
Steve Friedman Ph. D.
Ecologist / Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Hello,
I'm working with a series (30+) of hydrologic metrics and 10 vegetation
communities and I need to determine which of the metrics provide the best
separability for each of the vegetation communities. The hydrologic
metrics are highly correlated, therefore the need to reduce the number
John,
I would like ellipsoids to represent the distributions relative to each of
the vegetation types.
I tried your approach thinking that it would work as well, but I'm getting
an error
scatter3d(MADep2004 ~ Dhydro2004 + MedWet2004 | VegtypeID, ellipsoid=TRUE.
data= CSSS)
Error in sprintf
1 - 100 of 109 matches
Mail list logo