Displaying 20 results from an estimated 100 matches similar to: "Thornthwaite Method in R"
2012 Jun 04
2
paquete SPEI función thornthwaite
Hola eRReros.
Os lo explico con un ejemplo:
# Cargamos los paquetes y el ejemplo
install.packages("SPEI")
library("SPEI")
data(wichita)
# los primeros 12 datos
head(wichita,12)
# mi subset de los primeros 12 datos
meu<-wichita[c(1:12),]
meu
# como veis los valores de TMED son iguales en ambos dataframes.
# ahora viene el problema
# calculamos
2013 Mar 11
3
New Stack
Hi Experts, I am newbie in R. Could you please share your idea to create a stack with no value or zero value? Nrow=1,Ncol=1, Ncell=1, I aim to work with looping, I want to make a first layer with zero values to add other layers further. Thanks.
Best Regards,
..................Anup KhanalNorwegian Institute of science and Technology (NTNU)Trondheim, NorwayMob:(+47) 45174313
2013 Feb 22
1
Netcdf file in R
Good afternoon,
I am a new in R. I have to work with large climate data.I am not able to read the netcdf file. Can anyone try with this file attached ?
Best Regards,
..................Anup KhanalNorwegian Institute of science and Technology (NTNU)Trondheim, NorwayMob:(+47) 45174313
2013 Feb 23
1
Extract, sum and Loop in R
Hi all,
I have gone through some basics of R in eclipse environment. What I need to
work is more than basic level so I could not find out the solution by
myself. could anyone help me ?
My case,
I have climate data (precipitation) in nc format with single layer for each
time interval in a day. That means for January 1, 2013, I have 8 separate
files each containing 3 hrs cumulative precipitation
2013 Apr 26
1
How to export graph value in R
Dear exports,I have created a hypsometric curve (area-elevation curve) for my watershed by using simple command hypsometric(X,main="Hypsometric Curve", xlab="Relative Area above Elevation, (a/A)", ylab="Relative Elevation, (h/H)", col="blue")It plots the hypsometric curve in "RGraphics window", My question is how can I export values which is used
2013 Apr 05
0
How to see values of hypsographic curve in R
Hi Experts,
Could I ask one question ? I have plotted hypsographic curve for one watershed. I want to see the values of curve as I have to create elevation-volume curve from it. Could you please explain me how to see data that is used in curve ?
Best Regards,..................Anup KhanalNorwegian Institute of science and Technology (NTNU)Trondheim, NorwayMob:(+47) 45174313
2012 Jul 13
0
How to simulate the relationship of vegetation and groundwater in Minqin Oasis, Gansu Province, China
*Dear **Madam**/**Sir,*
*What would happen if we irrigate the degraded land using the desalinated
saline water in Minqin Oasis, Gansu Province, China? Can we prevent the
disappearing of Minqin Qasis?*
*
*
*Background:*
*1. **The Minqin Oasis is surrounded by two deserts, Badain Jaran
Desert and Tengger Desert. *
*2. **Water is the root of ecological
2002 Dec 13
1
Advice on long for loop
I'd appreciate advice on the following:
I've written an R function
that uses 3 vectors (temperature,
precipitation and potential evapotranspiration)
for a given site, calculates a water budget
(which implies few (<4) iterations), and, from
thresults of this water budget, calculates a number of
bioclimatic indices.
Now I want to calculate these indices
for a large number of sites
2016 Aug 01
0
new version of package water: Actual Evapotranspiration with Energy Balance Models
Dear R users,
I'm glad to announce the new version of water package (0.5).
As this is my first message to the list, I want to add that this
package provides tools to estimate actual evapotranspiration from
surface energy balance models.
Right now you can run the well-know METRIC model using it. This model
allows to estimate the energy balance using landsat (7 or 5) images
and a weather
2016 Aug 01
0
new version of package water: Actual Evapotranspiration with Energy Balance Models
Dear R users,
I'm glad to announce the new version of water package (0.5).
As this is my first message to the list, I want to add that this
package provides tools to estimate actual evapotranspiration from
surface energy balance models.
Right now you can run the well-know METRIC model using it. This model
allows to estimate the energy balance using landsat (7 or 5) images
and a weather
2007 Oct 10
1
error message with option checkBuild in update.packages in R 2.6.0
Hi
System: Linux Open SuSE 10.2
I upgraded to R 2.6.0 and wanted to upgrade my packages as well. I tried
to use the checkBuild=TRUE option in update.packages, it asked me if I
wanted to update the package and I answered with yes, and finally ig
tave me the error message unknown parameter "checkBuild" in function
install.packages.
My question: is the option still necessary or is
2007 May 31
1
plotting variable sections of hourly time series data using plot.zoo
Dear list,
I have to look examine hourly time - series and would like to plot variable
section of them using plot.zoo.
Hourly time series data which looks like this:
YYYY MM DD HH P-uk P-kor P-SME EPOT EREA RO R1
R2 RGES S-SNO SI SSM SUZ SLZ
2003 1 1 1 0.385 0.456 0.021 0.000 0.000 0.000 0.013
0.223 0.235 0.01 0.38
2011 Mar 14
3
increase a value by each group?
Hi everybody.
I'm looking for the way to increase the depth value in 0.01 for each index group.
Easier to explain with this example:
>my_data=read.table("clipboard", header=TRUE)
Depth s_name index
3852 Site_1 144
3852 Site_1 144
3852 Site_1 144
3852 site_A 145
3852 site_A 145
3852 site_A 145
3852 site_A 145
3852 site_B 147
3852 site_B 147
3852 site_B 147
3852 site_B 147
54962
2010 Apr 16
0
Blocking and Nested ANOVA Design. Am I using the aov() function correctly?
Dear list members,
I am new member and fairly new into R world! I hope what I have is not
beyond the purpose of this list. I did first search for similar
experimental designs without success.
I want to perform an ANOVA analysis using the aov() function. I am not
100% sure that I have it right. If anyone can help me, that will be
greatly appreciated. My design is not balanced for any of the
2002 Jul 03
0
poly.transform in R
Dear all,
I am trying to transform polynomial coefficients from orthogonal form to
the standard power basis. There's poly.transform in S-plus. Does anybody
know how to do that in R ? I've found question about that in the
archives of R-help but no real answer.
Example : I'm doing polynomial regression of percentage of one insect in
a community on altitude, precipitations,
2007 Jun 04
0
It alborn which herron
marked by the genius, the courage, the originality, and the written. Not only is Tradition silent, but even Fable herself does not attempt to tell the story of the origin of her population. Here stand In accordance with these principles, we observe that, while the most
tear her away, and then, maddened by her resistance and the sight of the sea and of the land by evaporation, falls again, under
2007 Jun 04
0
It alborn which herron
marked by the genius, the courage, the originality, and the written. Not only is Tradition silent, but even Fable herself does not attempt to tell the story of the origin of her population. Here stand In accordance with these principles, we observe that, while the most
tear her away, and then, maddened by her resistance and the sight of the sea and of the land by evaporation, falls again, under
2011 Aug 03
4
slow computation of functions over large datasets
Hello there,
I’m computing the total value of an order from the price of the order items
using a “for” loop and the “ifelse” function. I do this on a large dataframe
(close to 1m lines). The computation of this function is painfully slow: in
1min only about 90 rows are calculated.
The computation time taken for a given number of rows increases with the
size of the dataset, see the example with
2017 Aug 11
0
PROC MIXED RANDOM equivalence in R nlme
Dear Dennis,
Your question assumes that people know both SAS PROC MIXED and R nlme. Only
a limited number of people do. Add the mathematical formulation of the
model. That will increase the number of people that can help you. Adding
the number of levels in each categorical variable and the number of
observation per group is useful too.
Best regards,
ir. Thierry Onkelinx
Instituut voor natuur-
2017 Aug 10
4
PROC MIXED RANDOM equivalence in R nlme
I am trying to reproduce some old SAS PROC MIXED code using R and nlme.
The data consists of emission readings from vehicles and fuel
properties. All variables are real numbers except "study" and "vehicle",
which are character. Unfortunately, since the data are confidential, I'm
unable to provide an example.
The original SAS v6.12 code is provided below: