search for: hydrological

Hello world, I am actually transferring a course in data management for students in biology, geography and agriculture from statistica to R - it works surprisingly well. If anyone is interested in my scratch/notepad (in German language), please see www.hydrology.uni-kiel.de/~schorsch/statistik/statistik_datenauswertung.pdf (pages 40-52) The dataset is:

Hi, a new package ?HBV.IANIGLA? for hydrological modeling has been relesased. CRAN: [ https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html | https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html ] In case of doubts do not hesitate to write. Best, Ezequiel Toum -- Ezequiel Toum Ingeniero Civil Becario Doctoral h...

Hi, a new package ?HBV.IANIGLA? for hydrological modeling has been relesased. CRAN: [ https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html | https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html ] In case of doubts do not hesitate to write. Best, Ezequiel Toum -- Ezequiel Toum Ingeniero Civil Becario Doctoral h...

Dear R and hydrological community, The first public (beta) release of two new R packages are now available on CRAN: ############ # hydroTSM # ############ 1) hydroTSM is a package for management and analysis of hydrological time series: http://cran.r-project.org/web/packages/hydroTSM/ hydroTSM includes S3 functions...

Dear R and hydrological community, The first public (beta) release of two new R packages are now available on CRAN: ############ # hydroTSM # ############ 1) hydroTSM is a package for management and analysis of hydrological time series: http://cran.r-project.org/web/packages/hydroTSM/ hydroTSM includes S3 functions...

Hello, In R I am trying to use Kalman filtering to find a solution for an hydrological problem. With Kalman Filtering I want to estimate the discharge comming from three storage bassins. I have programmed a function in R which can run KalmanSmooth. When I'm asking for the function and putting in values, R detects the following error: "Error in as.vector(data) : Argument &quo...

Hello world, I am actually trying to transfer a lecture from Statistica to R and I ran into problems with spectral analysis, I think I just don't get it 8-( (The posting from "FFT, frequs, magnitudes, phases" from 2005 did not enlighten me) As a starter for the students I have a 10year data set of air temperature with daily values and I try to get a periodogram where the annual

Dear R developers, Due to the increasing use R in hydrology and other close-related environmental sciences, I would like to ask if it would be possible to create a new Special Interest Group mailing list, called 'R-sig-hydro', specially devoted those topics. If possible to do so, I'd offer myself to maintain such mailing list (if needed). Thanks in advance, Mauricio

Hello, I am trying to create a plot often seen in hydrodynamic work than includes a contour plot representing the water speed with arrows pointing in the direction of flow. Does anyone have any idea how I might add arrows based on wf$angle (in the example below) to the plot below? Thanks in advance! Sam library(lattice) speed <- runif(100, 0, 20) wf <- data.frame(speed) wf$width <-

Dear all, I wonder if anyone can help me with specifying a right model for my analysis. I am a beginner to lme methods. I was unfortunately not able to find a solution to my problem on my own. Data structure: I have sampled monthly 6 basins during two hydrological cycles, and I have taken several (2 to 4) samples (“replicate”) for each basin and month. I’m trying to relate Shannon diversity to some environmental variables, taking away pseudoreplication. Thus, I have tried an lme model with “time” and “basin” as random factors. I have put hydrological cycle a...

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 of them considered is critically important. I've been looking at the scatter3d function in the

Dear R users and hydrological/environmental community, I'm glad to announce that a major (and recommended) update for the packages hydroTSM and hydroGOF are now available on CRAN: -) hydroTSM: http://cran.r-project.org/web/packages/hydroTSM/ -) hydroGOF: http://cran.r-project.org/web/packages/hydroGOF/ ################...

How can I access examples of trellis graphs in R? I'm especially interested in getting code for xyplot() examples. Failing a collection of examples in R, I see that under Splus there are numerous example.*() functions. I can access Splus with a command line but can't open a graphics window, so I can't to execute the example.*() functions. Is there a way I could get the associated

Dear R users and hydrological/environmental community, I'm glad to announce that a major (and recommended) update for the packages hydroTSM and hydroGOF are now available on CRAN: -) hydroTSM: http://cran.r-project.org/web/packages/hydroTSM/ -) hydroGOF: http://cran.r-project.org/web/packages/hydroGOF/ ################...

Hi folks: I think I'm having problems with figuring this one out: test1 <- function() { n <- 2 for(i in 1:n) { cat(paste("i =", i, "\n")); flush.console() n <- 5 # version 1 #n <<- 5 # version 2 #assign("n", 5, envir = environment(test1)) # version 3 } } I need the for(.) loop to run (say) n=5 times within the

Hi Eric, How about match( TRUE, cumsum(hyd/sum(hyd)) > .5 ) - 1 HTH, Eric On Sat, Dec 16, 2017 at 3:18 PM, Morway, Eric <emorway at usgs.gov> wrote: > The small bit of script below is an example of what I'm attempting to do - > find the day on which the 'center of mass' occurs. In case that is the > wrong term, I'd like to know the day that essentially cuts

Hi Eric, the following works for me. HTH, Eric library(EGRET) StartDate <- "1990-10-01" EndDate <- "2017-09-30" siteNumber <- "10310000" QParameterCd <- "00060" Daily <- readNWISDaily(siteNumber, QParameterCd, StartDate, EndDate) # Define 'center of mass' function com <- function(x) { match(TRUE, cumsum(x/sum(x)) > 0.5) -

Hello world, I have a very strange update problem: this night I upgraded from 3.0.5 to 3.0.6 (debian unstable) and the system broke completely with very strange errors (I did not change anything to smb.conf) - win98 users can log in, copy and everything - xp users can log in, they see the shares but they cannot access the files (read error in xp). I have tested it with Xp-Prof SP1 und SP2

The small bit of script below is an example of what I'm attempting to do - find the day on which the 'center of mass' occurs. In case that is the wrong term, I'd like to know the day that essentially cuts the area under the curve in to two equal parts: set.seed(4004) Date <- seq(as.Date('2000-09-01'), as.Date('2000-09-30'), by='day') hyd <-

Hello, I am trying to define a different interval for a "year". In hydrology, a "water year" is defined as the period between October 1st and September 30 of the following year. I was wondering how I might do this in R. Say I have a data.frame like the following and I want to extract a variable with the water year specs as defined above: