[R] Help: Split-Split model nested in a nested structure
Dear list members. We are trying see effect of N on yield of three wheat genotypes under late and early planting conditions in saline and non-saline environments. Our experimental structure as follows: Districts (2: DIST01 and DIST02) - Not randomly selected ENV (Saline and Non-Saline) - One saline and non-saline environment (eg. village) were selected in each district (not random). *SOWING Time (Late and Early):* 8 farmers' fields were selected randomly in each environment or village. These are spatially distributed in a village. Among them, 4 were grouped as early and 4 were grouped as a late sowing group. *N_TREAT (N0 and N100)* - Then, each farmer field was splitted into two main plots where two N-treatment were assigned randomly. *GENOTYPE ( G1, G2, G3*) - Then, N-main plots were further splited into three subplots here 3 wheat varieties were assigned randomly. This experiment was repeated for two years. Farmers' fields in Year 1 and Year 2 were not same. We are not interested to see the District effect on wheat yield here. Rather, we like to see the effect of saline environment, sowing time, N and genotype and their interaction on wheat yield for year 1 and year 2 separately. We are using the following ANOVA model. We do not know whether we are missing something here. Help will be highly arreciated. Regards Zia Ahmed, CIMMYT model-aov(YIELD~ENV*SOWING*N_RATE*GEN+Error(FARMERS/N_RATE/GEN), data=mydata) summary(model) # District: two DIST-as.factor(rep(c(DIST01,DIST02),each=96)) # ENV: Saline and Non-saline environment ENV-as.factor(rep(rep(c(Saline,Non-saline),each=48),2)) # Farmers 16 FARMERS-as.factor(rep(c(F1,F2,F3,F4,F5,F6,F7,F8, F9,F10,F11, F12,F13,F14,F15,F16),each=12)) # Showing Date: two SOWING-as.factor(rep(rep(c(Early,Late),each=6),16)) # Nitrogen treatments: N0 and N100 N_RATE-as.factor(rep(rep(c(N0,N100),each=3),32)) # Genotype GEN-as.factor(rep(rep(c(V1,V2,V3),each=1),64)) # Response: Wheat Yield set.seed(1234) YIELD - rnorm(n=192, mean=3.0, sd=0.5) # Create Data Frame mydata-data.frame(DIST,ENV, FARMERS,SOWING,N_RATE,GEN,YIELD) mydata [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] help to split a ID column in a data.frame and create a new ID column
Dear Researchers, I have a data.frame with 2 columns like this: mydf - data.frame(value=c(1,2,3,4,5),ID=c(Area_1,Area_2,Area_3,Area_4,Area_5)) mydf value ID 1 1 Area_1 2 2 Area_2 3 3 Area_3 4 4 Area_4 5 5 Area_5 I need to convert the *ID *in the following version mydf value ID newID 1 1 Area_1 AreaSample1 2 2 Area_2 AreaSample2 3 3 Area_3 AreaSample3 4 4 Area_4 AreaSample4 5 5 Area_5 AreaSample5 some people know the right function to split ID and create a new column Thanks in advance Gianni [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] help to split a ID column in a data.frame and create a new ID column
Hi Gianni, Thank you for the reproducible example! Try mydf$newID - with(mydf, gsub(_, Sample, ID)) mydf HTH, Jorge.- On Fri, Mar 16, 2012 at 7:54 AM, gianni lavaredo wrote: Dear Researchers, I have a data.frame with 2 columns like this: mydf - data.frame(value=c(1,2,3,4,5),ID=c(Area_1,Area_2,Area_3,Area_4,Area_5)) mydf value ID 1 1 Area_1 2 2 Area_2 3 3 Area_3 4 4 Area_4 5 5 Area_5 I need to convert the *ID *in the following version mydf value ID newID 1 1 Area_1 AreaSample1 2 2 Area_2 AreaSample2 3 3 Area_3 AreaSample3 4 4 Area_4 AreaSample4 5 5 Area_5 AreaSample5 some people know the right function to split ID and create a new column Thanks in advance Gianni [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Help needed: Split-split plot analysis
Hello, I am very new to R but would like to use the software to analyse the attached data. The experiment followed a split-split plot design There were two blocks and the whole plot is CO2 with two levels. The sub-plot is soil temperature with three levels and the sub-sub plot is soil moisture content with three levels (low, intermediate and high-similar for soil temperature). I had 7 plants per treatment combination and 252 plants in total. CO2, soil temperature and moisture are fixed factors. Blocks are always random. What package do I need to perform a split-split plot analysis? Can someone help me with the code for the analysis? Thank you. Sincerely, Forest Member __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Help needed: Split-split plot analysis
It looks like you need something like this. The data you attached didn't make it through the email system. ## you might need install.packages(HH) ## do this once library(HH) ## do this every time you start a new R session interaction2wt(y ~ Block + CO2 + temp + moisture) ## the rest is standard R from the stats package safe.aov - aov(y ~ CO2*temp*moisture + Error(Block/CO2), data=safe) model.tables(safe.aov) anova(safe.aov) Rich [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Help with split.
I read in the documentation for split: ‘split’ divides the data in the vector ‘x’ into the groups defined by ‘f’. But I am still unclear as to its function. Take for example: x - 1:4 split(x, c(0,1)) $`0` [1] 1 3 $`1` [1] 2 4 I am not clear on how this result is reached. Thank you. Kevin __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Help with split.
rkevinbur...@charter.net wrote: I read in the documentation for split: ‘split’ divides the data in the vector ‘x’ into the groups defined by ‘f’. But I am still unclear as to its function. Take for example: x - 1:4 split(x, c(0,1)) $`0` [1] 1 3 $`1` [1] 2 4 I am not clear on how this result is reached. Usual recycling rule: Same result as split(x, c(0,1,0,1)). -- O__ Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
