Displaying 12 results from an estimated 12 matches for "hectares".
2005 May 24
2
Basic matematical functions with NAs
Dear All,
I've tried to sum columns -- different species of flowers, fruits plus twigs -- with NAs to get litterfall/trap, and then after use litterfall to calculate production (litterfall (grams)/ hectare/ day. But R 'sees' litterfall/trap as a string.
My question: How to use basic mathematical functions to deal with NAs in data management.
Example (as you can note I have many
2010 Apr 01
1
Best fitted curve using AIC
Dear fellows,
I need a R script that compare known curves (e.g. logistic, exponential)
with my curve. That curve was generated fitting data of forest cover
(hectares) measured in 10 road distances (buffers).
I´d like that comparison should be done using AICc to select the best model,
that is, the best fitted curve in comparison with my data.
Anyone could help me?
Best regards
Simone.
--------------------------------------------------
Simone R. Freitas
Unive...
2012 Oct 18
1
Mapping
I am a new user of R and am crunching through the system. I have reached an impasse with mapping; I want to make a bubble map and lay it over a grid that is composed of a standard x,y axis. Within this, are 16 (4x4) gridded blocks, numbered 1-16. And, within these individual hectares(1-16) it is further subdivided into individual x,y plots ( in accordance with the overall x,y axes). I have a general idea of how to make the bubble map but the background map is giving me a lot if trouble...HELP
Sent from my iPhone
2006 Feb 07
2
getting strata/cluster level values with survey package?
...ta, srv1 ) )
total SE
vol 2377.0 34.464
strataA 42.0 0.000
strataB 64.0 0.000
strataC 34.0 0.000
which reports the number of observations in each of the strata. I'm sure
this is a RTFM question, but I just need a start. The size of each "plot"
is 0.04 units (hectares) and I want to be able to quickly examine working
up each sample with and without clusters (this is going to be part of a
larger simulation study).
I'm trying to not use SAS for this and hate to admit defeat.
Thanks,
Jeff.
2013 Feb 14
2
3D-plots of 2D-grids
Hello everybody,
I have an Ascii-grid (100x100m) with population density over Switzerland
(local coordinations system, CH LV03). Now I would like to have a nice
graphic to present the data. I would like to make a plot that will show the
density as the z-variable and raise for example a stacking pillar showing
how high the density is in that hectare. I attached a map that's similar to
what I
2018 Mar 04
2
Random effect in GAM (mgcv)
Dear R users,
I am using the *mgcv package* to model the ratio of hectares of damaged
culture by wild boar in french departments according to some
environmental covariates. I used a _Beta distribution_ for the response.
For each department, we estimated the damaged in 3 different culture
types (??Culture??). Our statistical individual are therefore the
department cr...
2008 Jun 25
3
gap.boxplot error message?
Hello,
When I put in the following script line:
gap.boxplot(CLI3, CLI4, CLI5, CLI6, CLI7, gap=list(top=c(8000,280000), bottom=c(0,250)), range=50, outline=TRUE, par(ask=FALSE)
I get a '+' telling me I am missing something. I have tried adding ')', 'width=NULL', etc and then I get this error:
Error: unexpected symbol in:
"gap.boxplot(CLI3, CLI4, CLI5, CLI6, CLI7,
2004 Jun 15
0
Keywords and Concepts - CTFS package
The package I am writing is for the Center for Tropical Forest Science, CTFS. This "center" is a collaboration of 15+ institutions world wide that are investigating properties of tropical forest dynamics, species diversity, species distributions. The investigation is composed of the same sampling design of the forest: a large 50 hectare plot (usually) in which every tree >= 10 mm in
2011 Dec 12
1
calculating logit parameters (odd ratio is exactly one or zero)
Dear statistician experts,
Sorry if this is a trivial question, or the old same question (i don't know
what is the efficient key word for this issue).
In order to understand the calculation of parameter of logistic regression,
I did an exercise through spreadsheet following the procedural example
from a literature, or the available spreadsheet (with calculation formula).
I ended up with
2018 Mar 04
0
Random effect in GAM (mgcv)
...oming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Sun, Mar 4, 2018 at 4:10 AM, Vaniscotte Am?lie <vanamelie at gmail.com>
wrote:
> Dear R users,
>
>
> I am using the *mgcv package* to model the ratio of hectares of damaged
> culture by wild boar in french departments according to some
> environmental covariates. I used a _Beta distribution_ for the response.
>
>
> For each department, we estimated the damaged in 3 different culture
> types (? Culture ?). Our statistical individual are the...
2008 Jun 25
0
subscripted assignments errormessage in gap.boxpot
....csv", header=TRUE, sep=",")
cli7<-read.table("F:\\Megan\\cli7.csv", header=TRUE, sep=",")
# Attach these to the dataframe
attach(cli3)
attach(cli4)
attach(cli5)
attach(cli6)
attach(cli7)
# Calculate box and whisker values for each file
#CLI3<-(quantile(hectares))
#CLI4<-(quantile(hectares2))
#CLI5<-(quantile(hectares3))
#CLI6<-(quantile(hectares4))
#CLI7<-(quantile(hectares5))
# Set margins for plot area
par(mar=c(5, 5, 3, 1))
#classes<-list(cli3, cli4, cli5, cli6, cli7)
classes<-c(cli3, cli4, cli5, cli6, cli7)
gap.boxplot(classe...
2006 Sep 07
0
plot image matrix with row/col labels
I'm working with an historical image that may be (one of?) the first
uses of gray-scale shading to show the pattern of values in a
matrix/table, later used by Bertin in his 'reorderable matrix'
and sometimes called a scalogram.
The image is at
http://euclid.psych.yorku.ca/SCS/Gallery/images/Private/scalogram.jpg
The rows refer to the arrondisements of Paris, the cols to various