search for: drought

...nova.lme() approach correct for that model? And why does the F-test for CO2 yield a non-significant P-value, while the t-test in the summary.lme() is significant? Many thanks for your help! Best wishes Christoph ###################################################### mod11=lme(log(ind1+1) ~ CO2*DROUGHT*TEMP, random=~1|B/C,na.action=na.exclude) summary(mod11) Linear mixed-effects model fit by REML Data: NULL AIC BIC logLik 97.3077 115.6069 -37.65385 Random effects: Formula: ~1 | B (Intercept) StdDev: 1.303146e-05 Formula: ~1 | C %in% B (Intercept) Residual StdD...

type count 0 20 1 15 0 10 1 35 0 28 I would like to create two vectors from the data above. For example, type1=c(15, 35) and type0 = c(20, 10, 28). Can any one help Raphael

Does anyone have the code to calculate the drought severity index? -- Muhammad Rahiz | Doctoral Student in Regional Climate Modeling Climate Research Laboratory, School of Geography & the Environment Oxford University Centre for the Environment, University of Oxford South Parks Road, Oxford, OX1 3QY, United Kingdom Tel: +44 (0)1865-285194...

Hi, Could someone tell me if this is the correct model syntax for the following dataset: lme(height~treatment+genotype+treatment*genotype,drought,random=~genotyp e) The dataset has two factors: one fixed - treatment, and one random - genotype. I need to test the effect of both factors to identify their significance. There are multiple (but not equal) replicates at each level of genotype (the replicates are independent biological samples)....

Hi All, I am trying to lable the y-axis on my scatterplot with the following: "Soil moisture content (m3m-3)" I am using the following coding for plotting the graph: plot(soilmoisture~gradientlevel, xlab="Levels of droughting gradient", ylab="Soil moisture content (m3m-3)", bty="l", font.main="2", pch=16, las=1, cex.lab="1.13") I have tried to incorporate 'expression' into this coding for the ylab as follows (with also a few variations): plot(soilmoisture~gradient...

Dear all, I'm trying to make an R code for the drought severity index (DSI) developed by Philips and McGregor (1998). You can refer to the description of the algorithm on page 19 from http://dissertations.port.ac.uk/229/01/MaloneS.pdf The code is given in Excel as the following and can be found on page 60 from the same link. C7 = IF(C6<0,IF(@S...

hi i try to use arima and holtwinter to predict drought from 1895-2006 but i cannot read whole period of time and i try to do the exponent fitting, but it comes out as the coordinate x-y error i send the source code and data to take a look if anyone can help me, i am really new in R thank u so much jam

...er the data is running down the column in gpcc.data2 so n increses by 1 each time and each data point is pulled off.... It needs to be a lot quicker, I'd appreciate any ideas! Many thanks for taking time to read this, Jenny Barnes ~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student - long range drought prediction Climate Extremes Department of Space and Climate Physics University College London Holmbury St Mary, Dorking Surrey RH5 6NT 01483 204149 07916 139187 Web: http://climate.mssl.ucl.ac.uk

...ve wanted to interpolate your data is this way. If there is no ready-made function you know of but you are willing to share your own methods I would also appreciate any pointers. Many thanks for your time, Jenny Barnes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student - long range drought prediction Climate Extremes Department of Space and Climate Physics University College London Holmbury St Mary, Dorking Surrey RH5 6NT Web: http://climate.mssl.ucl.ac.uk

...month 06 day 01 svn rev 38247 language R version.string Version 2.3.1 (2006-06-01) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student: long range drought prediction Climate Extremes Group Department of Space and Climate Physics University College London Holmbury St Mary Dorking, Surrey, RH5 6NT Tel: 01483 204149 Mob: 07916 139187 Web: http://climate.mssl.ucl.ac.uk

...but the advice seems to be for much form complicated examples, there must be a simpler way for what I am trying to do? If anybody can help me I would greatly appreciate your advice and time, Best Wishes, Jenny ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student: long range drought prediction Climate Extremes Group Department of Space and Climate Physics University College London Holmbury St Mary Dorking, Surrey, RH5 6NT Web: http://climate.mssl.ucl.ac.uk

...probably thinking that is the longest weeks vacation on record. Well, I''d like to take this opportunity to apologise for my absence and offer a brief explanation. When I got back to Australia I naturally went home to visit my parents, only to find that they have been hit really hard by the drought. They didn''t really tell me just how bad it was while I was in Japan. Add to that the fact that my dad is 67, he just had a heart valve replaced two years ago and he is running a 7000 acre property by himself. So I decided to stay home for a while and offer a hand during the busy sheering...

...re ask for a help to organize data. I really need help from you. I have several data sets to organize. I have to summarize precipitation data collected in different days and months in only one table. However, those data are disperse in days and times. Those rainy days have a more observations than drought ones. Below you can find a hypothetical example of what I have and I what I need comes in sequence. The following table is what I have for a single year. Notice that number of observations varies from day to day entire year. *Day* *Time* *Prec* Jan 1 7:00 20mm 1 7:20 15mm 1 7:30...

....contourplot in the R-help mailing list but I don't know the right way to call two different data arrays, can anybody help me please? I appreciate your time and help with this question. Many thanks, Jenny ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student: long range drought prediction Climate Extremes Group Department of Space and Climate Physics University College London Holmbury St Mary Dorking, Surrey, RH5 6NT Tel: 01483 204149 Mob: 07916 139187 Web: http://climate.mssl.ucl.ac.uk

...e simply tell me whether this is correct as I find it very hard to know which way up my data should be and I cannot tell which is correct simply by looking at it! Many thanks for your time in reading this problem, Jenny Barnes ~~~~~~~~~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student - long range drought prediction Climate Extremes Department of Space and Climate Physics University College London Holmbury St Mary, Dorking Surrey RH5 6NT 01483 204149 07916 139187 Web: http://climate.mssl.ucl.ac.uk

....99, 0.1, 0.3, 0.4, 0.5, 0.5, 0.2, 0.1, 0.4, 0.3, 0.43)), .Names = c("sn", "growthrate"), class = "data.frame", row.names = c(NA, -14L)) I want to find the ranges of growth rate of the above data using Mote corle simulation (9999 times) under three conditions: 1. very drought ( in that condition growth will not be more than 0.5). [what would be the range (max, min ) of the growth rate for this scenario) 2. no constraints of food (growth will be 1 or 100%) (what would be the range (max,min) of growth rate in this scenario?). 3. Control (as it is) (Range??, max.min) I t...

Hi everyone, I have a question about calculating r-squared in R. I have tried searching the archives and couldn't find what I was looking for - but apologies if there is somewhere I can find this... I carried out a droughting experiment to test plant competition under limited water. I had: - 7 different levels of watering treatment (1 -7 - from most watered to least watered/) - 15 replicates at each level. Soil moisture readings were taken 4 times throughout the experiment (so I have 105 readings for each of the 4...

...have two independent variables, which are sites and treatments. I have 6 sites which are peatlands. I collected 5 replicates (at the same time) from each of the sites. I used each of the replicates in a treatment. There were 4 treatments. 2 were controls and the other two were a simulated 30 day drought and a simulated 60 day drought. >From each of the replicates in each of the treatments I measured pH and nitrate, sulphate, dissolved organic carbon, calcium, magnesium, nickel, cobalt, aluminum, and copper concentrations. I tried performing an NMDS using the following tutorial http://strata.ug...

...;,i, j, mon2, sep="") > newindata <- sec.mon*indata > > k<-k+1 > data.out$date[k] <- paste(i, j, mon2, sep="") > data.out$data[k,] <- newindata >} >} > > >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >Jennifer Barnes >PhD student - long range drought prediction >Climate Extremes >Department of Space and Climate Physics >University College London >Holmbury St Mary, Dorking >Surrey >RH5 6NT >Web: http://climate.mssl.ucl.ac.uk > >______________________________________________ >R-help at stat.math.ethz.ch mailing list...

...;) > } > } I appreciate your time very much. If I don't iron out this problem now the ground-work for my entire PhD will not be stable at all, Many thanks for reading my problem, happy 2007 :-) Jenny Barnes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jennifer Barnes PhD student - long range drought prediction Climate Extremes Department of Space and Climate Physics University College London Holmbury St Mary, Dorking Surrey RH5 6NT 01483 204149 Web: http://climate.mssl.ucl.ac.uk