Displaying 6 results from an estimated 6 matches for "worldclim".
2010 Jun 09
1
Subset columns by prefix
Hello R listserve,
I would appreciate someone's help with this problem. Consider the following toy dataset:
x <- read.table(textConnection("worldclim.1 worldclim.2 cru.1 cru.2
indv.1 7 8 32 658
indv.2 7 7 39 422"), header = TRUE)
How could I create a subset of the data based on the column prefix? For instance, let's say I wanted to subset only the columns with the "cru" prefix. Keep in mind that my real data set is very large...
2024 Oct 10
1
Anuncio del paquete de R, paisaje, para el análisis del paisaje y la biodiversidad
...t_esa_10m*: Download land cover data
*get_h3_grid*: Generate an H3 Hexagonal Grid for an sf Object
*get_nightlight_data*: Download and Retrieve Nightlight Data
*get_records*: Retrieve species occurrence records within an Area of
Interest
*get_records_by_hexagon*: Get species records by hexagon
*get_worldclim_future*: Download and process future environmental variables
made by worldclim version 2.1.
*get_worldclim_historic*: Download and process environmental variables made
by worldclim version 2.1.
--
*Manuel Spínola, Ph.D.*
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universid...
2024 Oct 10
1
Anuncio del paquete de R, paisaje, para el análisis del paisaje y la biodiversidad
...r data
> *get_h3_grid*: Generate an H3 Hexagonal Grid for an sf Object
> *get_nightlight_data*: Download and Retrieve Nightlight Data
> *get_records*: Retrieve species occurrence records within an Area of
> Interest
> *get_records_by_hexagon*: Get species records by hexagon
> *get_worldclim_future*: Download and process future environmental variables
> made by worldclim version 2.1.
> *get_worldclim_historic*: Download and process environmental variables made
> by worldclim version 2.1.
>
> --
> *Manuel Spínola, Ph.D.*
> Instituto Internacional en Conservación y...
2018 Jun 19
3
Paquete dismo, cálculo coeficiente de variación
Estimados erreros,
Estoy intentando entender como calcula el paquete dismo (
https://cran.r-project.org/web/packages/dismo/index.html) un coeficiente de
variación. Os pongo un ejemplo:
tmin <- c(10,12,14,16,18,20,22,21,19,17,15,12) # temperatura mínima media
mensual de un año
tmax <- tmin + 5 # temperatura máxima media mensual de un año
prec <- c(0,2,10,30,80,160,80,20,40,60,20,0)
2018 Jun 19
2
Paquete dismo, cálculo coeficiente de variación
..., 1, cv)
>
>
> Es decir, en tu caso,
>
> > cv(prec+1)
>
> [1] 109.9637
>
> Lo que coincide con lo proporcionado por biovars, mientras que
>
> > cv(prec)
>
> [1] 112.5923
>
> coincide con tu c?lculo manual.
>
> En la p?gina web de WorldClim, donde definieron originalmente esta
> variable no he encontrado una explicaci?n de este sumatorio, pero
> tampoco he buscado mucho...Tal vez en alguno de los art?culos en los que
> se describe esta base de datos den raz?n de este sumatorio.
>
> Saludos,
>
> Marcelino
>
&...
2008 Dec 03
1
how to handle irregularly spaced data as timeseries
...For starters I need to simply plot the data as a
timeseries with DATE on the x axis. I am just getting my feet wet with
R, so I'm struggling a bit to follow the help() pages. Can anyone
point me in the proper direction? Thank you in advance.
Here is a piece of the dataframe:
> cloq.worldclim.HADCM3.A2a
DATE YEAR MONTH DAY DOY TMAX TMIN PAR PRECIP
1 15-Jan-2000 2000 1 15 16 -7.2 -19.7 334.99 2.5
2 15-Feb-2000 2000 2 15 46 -3.5 -16.8 471.48 1.7
3 15-Mar-2000 2000 3 15 75 2.7 -9.4 636.96 4.1
4 15-Apr-2000 2000 4 15 106 11.3 -2.1 726.60...