similar to: Issue when reading a table into R

Dear R friends, I am currently working with time series data, and I have a table(as data frame) that has looks like this (TransitDate are in format = "%e-%B-%Y") : TransitDate Transits CargoTons 1985-04-01 100 2500 1985-05-01 135 4500 1985-06-01 120 1750 1985-07-01 100 3750 1985-08-01 200

Hi Paul, #First I set up some sample data since I don't have a copy of your data dtOrig <- as.Date( c("1985-04-01","1985-07-01","1985-12-01","1986-04-01")) dfOrig <- data.frame( TransitDate=dtOrig, Transits=c(100,100,500,325), CargoTons=c(1000,1080,3785,4200) ) #Generate the complete set of dates as a data frame dfDates<- data.frame(

Basic algebra and exponentials/logs. I leave those details to you or another HelpeR. -- Bert On Sun, Aug 20, 2023 at 12:17?PM Paul Bernal <paulbernal07 at gmail.com> wrote: > Dear Bert, > > Thank you for your extremely valuable feedback. Now, I just want to > understand why the signs for those starting values, given the following: > > #Fiting intermediate model to get

Dear Bert, Thank you for your extremely valuable feedback. Now, I just want to understand why the signs for those starting values, given the following: > #Fiting intermediate model to get starting values > intermediatemod <- lm(log(y - .37) ~ x, data=mod14data2_random) > summary(intermediatemod) Call: lm(formula = log(y - 0.37) ~ x, data = mod14data2_random) Residuals: Min

Dear Bert, Thank you so much for your kind and valuable feedback. I tried finding the starting values using the approach you mentioned, then did the following to fit the nonlinear regression model: nlregmod2 <- nls(y ~ theta1 - theta2*exp(-theta3*x), start = list(theta1 = 0.37, theta2 = exp(-1.8), theta3 =

Possibly so. However, the ZeroMQ libraries do exist for Windows, so it might be possible to get the package working there. However, CRAN probably won't have the libraries, so cannot produce a binary package, and it is also quite possible that the package author is not a Windows person. At the very least, you'll need some familiarity with the Windows toolchain and be prepared to apply a

Dear Eric, Hope you are doing great. I also tried the following: #First I created the complete date sequence TransitDateFrame <- data.frame(TransitDate=seq(as.Date(dataset1[1,1]), as.Date(dataset1[nrow(dataset1),1]), by = "month")) #Then I did the merging dataset1NEW <- merge(TransitDateFrame, dataset1, by="TransitDate", all.x=TRUE) Now it has, as expected the

Dear all, Hope you are doing great. I have a .csv file that I read into R, the .csv file consistss of two fields (TransitDate and CargoTons). The TransitDate I formatted from Excel in the fashion mmm-yy (e.g.: Apr-2013). However R does not recognize the field TransitDate as a date field. Here is the code: library(lubridate) Dataset <- read.table("U:/NEWCargoData.csv",

Oh, sorry; I changed signs in the model, fitting theta0 + theta1*exp(theta2*x) So for theta0 - theta1*exp(-theta2*x) use theta1= -.exp(-1.8) and theta2 = +.055 as starting values. -- Bert On Sun, Aug 20, 2023 at 11:50?AM Paul Bernal <paulbernal07 at gmail.com> wrote: > Dear Bert, > > Thank you so much for your kind and valuable feedback. I tried finding the > starting

Dear all, Hope you are doing great. I am currently using R version 3.4.1 ("Single Candle") and was trying to install packages RODBC and RODBCext using the following steps: > install.packages("RODBCext") Installing package into ?C:/Users/PaulBernal/Documents/R/win-library/3.4? (as ?lib? is unspecified) also installing the dependency ?RODBC? trying URL '

Hi Instead of attachments copy directly result of dput(TransitDateFrame) and dput(dataset1) to your email. Or, if your data have more than about 20 rows you could copy only part of it. dput(TransitDateFrame[,1:20]) dput(dataset1[,1:20]) Only with this approach we can evaluate your data in all aspects and provide correct answer. Cheers Petr > -----Original Message----- > From: R-help

A couple thoughts: 1. converting factors into dates often requires that they be converted to character first. 2. you don't really have dates; you have just months and years 3. therefore perhaps the as.yearmon() function in the zoo package could help library(zoo) my.factor <- factor("Feb 2017") as.yearmon(my.factor) ## gets around the factor-vs-character issue On Mon, Jun

I don't use Windows, but this looks like a Windows permissions issue, no? You could try moving them yourself manually or create another library directory that R can access to put them in. ... or wait and hope for advice from someone who uses Windows to give you a definitive answer. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and

Hi Bert, Below the information you asked me for: nrow(mydataset) [1] 2986276 ######## sapply(mydataset, "class") $`Transit Date` [1] "POSIXct" "POSIXt" $`Market Segment` [1] "character" $`N?mero de Tr?nsitos` [1] "numeric" $`Tar No` [1] "character" $`Beam Range (Operations)` [1] "character" $`Operational Vessel Ranges

Hello R community, I basically created a normal distribution with mean 2500 and standard deviation = 450 with a sample of size 50 and assigned that to a variable named genvar2 with the following command: genvar2<-rnorm(mean=2500, sd=450, n=50) Now, the output of genvar2 generates de following: [1] 2478.126 2671.259 2163.879 2440.796 2702.234 1871.514 2525.127 2830.688 [9] 2704.148 3464.478

Hi Paul, I recently ran into file path conflicts and found the following useful (looks like you already know the answer to 1.): 1. Use .libPaths() to find where packages are being stored. 2. To change this path: Control Panel > search ?View advanced system settings? > Environment Variables *button *> a. *Edit* current R_LIBS_USER to new file path b. *New*

I got starting values as follows: Noting that the minimum data value is .38, I fit the linear model log(y - .37) ~ x to get intercept = -1.8 and slope = -.055. So I used .37, exp(-1.8) and -.055 as the starting values for theta0, theta1, and theta2 in the nonlinear model. This converged without problems. Cheers, Bert On Sun, Aug 20, 2023 at 10:15?AM Paul Bernal <paulbernal07 at

Dear Paul, We install R in C:/R/R-x.y.z and packages in C:/R/library. This makes the packages location independent from the R version. Best regards, ir. Thierry Onkelinx Statisticus/ Statiscian Vlaamse Overheid / Government of Flanders INSTITUUT VOOR NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE AND FOREST Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance

Dear Leslie and Thierry, Thank you so much for your kind and extremely valuable replies. Only one doubt remains, which path do you think is the best option to store downloaded packages? Should I set it up so that all installed packages are in the same folder (path) that I installed R? Or can I simply set it up so that all installed packages are stored in a different path? Again, thank you guys

Dear friends, I am currently using R version 3.4.2 (64-bit for Windows) and when trying to download package rggobi an error pops up with the following message: "The program can?t start because libxml2-2.dll is missing from your computer. Try reinstalling the program to fix this problem" Is this suggesting me to reinstall R or is there a way to get the libxml2-2.dll somewhere to solve