similar to: Specifying a function as not being and S3 Class function

Hello all, I'm having a problem concerning choosing columns from a dataset in a function. I'm writing a function for data input etc., which first reads the data, and then does several data manipulation tasks. The function can be then used, with just giving the path of the .txt file where the data is being held. These datasets consists of over 20 different analytes. Though, statistical

The R script below gives values of 1 for all minimum values when I use a custom function in summaryBy. I get the correct values when I use FUN=min directly. Any help is much appreciated. The continuous information provided in this forum is fabulous as are the different R packages available. Rene # Simulated simplified data Subj <- rep(1:4, each=6) Analyte <-

I have a simple 1 way anova coded like summary(ANOVA1way <- aov(Value ~ WellID, data = welldata)) How can I use the BY function to do this ANOVA for each group using another variable in the dataset?? I tried coding it like this, but it doesn't seem to work. summary(ANOVA1way <- by(welldata, Analyte, function(x) aov(Value ~ WellID, data = welldata))) In SAS I would code it like this:

Hello, Has anyone out there encountered a problem like this: xyplot(Plasma ~ Serum | Analyte, data = sp.df, aspect = 1, layout = c(1, 1, 200), scales = list(relation = "free") ) Gives the error: Error in pretty(x[is.finite(x)], ...) : x must be numeric On the other hand, this works (but I don't want the default of having everything on the same

HI I'm a student in chemical engineering, and i have to implement an algoritm about FIVE PARAMETERS INTERPOLATION for a calibration curve (dose, optical density) y = a + (c - a) /(1+ e[-b(x-m]) where x = ln(analyte dose + 1) y = the optical absorbance data a = the curves top asymptote b = the slope of the curve c = the curves bottom asymptote m = the curve X intercept Have you never seen

thanks to all of the great work that has been done to listview, my app is finally readable. cudos on the latest patch that fixed up text (that was getting truncated), it's correct this time around. anyways, the one thing missing to get my app working is column sorting (done by clicking a header). i have below the output from a "trace+listview,trace+header" run of the app, clipped

Dear R-helpers I am running a simple mixed effects model using lme(). The call looks like this: fit <- lme(Analyte~Sample, data=Data, random=~1 | Run) I am particularly interested in the estimated random effects. When I print the 'fit' object, it looks something like example below: (...) Random effects: Formula: ~1 | Run (Intercept) Residual StdDev: 3.483794 3.637523

Using a "by() statement, I am preparing ANOVA's for multiple experiments, and using simint() to generate confidence intervals. This works fine. simint.by.fit <- by(analytes.dfr, list(Assay = analytes.dfr$analyte ), function(data) (simint(value ~ tx, data = data,type='Tukey' ) ) ) I can separately prepare plots of the confidence intervals, and I can prepare separate plots

Hi, First let me thank you for the incredible help and resource that this forum is. I am trying to compare the repeated measurement of more than 100 analytes that have been take in 70 subjects at 2 time points adjusted for the time difference of sample times(TimeDifferenceDays), therefore I wanted to do it with a function that allows me to do all at once. (131 is the column difference that

Before I receive a barrage of 'try looking in the help file' messages, I have and to no avail. For a new user of R I would like to point out that in order to be able to use the help files/manuals effectively one must know the correct question and that only comes with using R! Could someone please direct me to why I keep getting the following error message "Error: subscript out of

Apologies to the listing, the problem was with the data set and not the code Thanks Michael Griffiths, Ph.D. Chemometrician Training, Quality and Statistics Group LGC Limited Queens Road Teddington Middlesex, TW11 0LY, UK Tel: +44 (0)20 8943 7352 Fax: +44 (0)20 8943 2767 e-mail: michael.griffiths at lgc.co.uk >>> "Michael Griffiths" <Michael.Griffiths at lgc.co.uk>

Hello, I would like to ask some help about the following problem: I'm running a soft called beersmith (www.beersmith.com) with wine. The soft is running but some lists are uncompletely displayed. Only the first column is displayed but I can sort lists on unvisible columns. I already have asked help from the developpers but havn't received any usefull answers:

David Ahern <dsahern at gmail.com> writes: > On 4/18/19 8:24 AM, Toke H?iland-J?rgensen wrote: >>>> >>> >>> Understood. Hopefully in March I will get some time to come back to this >>> and propose an idea on what I would like to see - namely, the admin has >>> a config option at load time to enable driver counters versus custom map

David Ahern <dsahern at gmail.com> writes: > On 4/18/19 8:24 AM, Toke H?iland-J?rgensen wrote: >>>> >>> >>> Understood. Hopefully in March I will get some time to come back to this >>> and propose an idea on what I would like to see - namely, the admin has >>> a config option at load time to enable driver counters versus custom map

Greetings R users, I am an R graphics newbie trying to produce a custom trellis plot using pairs() with R 2.7.2. I have spatial data on which I run a geographically weighted regression (gwr, using the -spgwr- package). I want to check the gwr coefficients for multicollinearity and spatial association, following Wheeler and Tiefelsdorf (2005), and I would like to summarize the results of this

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hello, > subset(swiss, Agriculture > 60 & Examination != c(14,16), select = c(Agriculture,Examination,Catholic)) Agriculture Examination Catholic Broye 70.2 16 3.30 Glane 67.8 14 4.20 Aigle 62.0 21 5.16 Avenches 60.7 19 5.23 Cossonay 69.3 22 5.62

David Ahern <dsahern at gmail.com> writes: > On 2/4/19 3:53 AM, Jesper Dangaard Brouer wrote: >> On Sat, 2 Feb 2019 14:27:26 -0700 >> David Ahern <dsahern at gmail.com> wrote: >> >>> On 1/31/19 1:15 PM, Jesper Dangaard Brouer wrote: >>>>> >>>>> David, Jesper, care to chime in where we ended up in that last thread

Dear All, The Decision and Policy Analysis (DAPA) program of the International Center for Tropical Agriculture (CIAT), a not-for-profit agriculture, biodiversity and ecosystems research center, supported by the Consultative Group of International Agricultural Research (CGIAR), with headquarters in Cali, Colombia is looking for a visiting researcher to work on various modeling projects, primarily

Hi, I'm wondering why indexing a data frame by row name doesn't work with [[. It works with [: > sw <- swiss[1:5,1:2] > sw["Moutier", "Agriculture"] [1] 36.5 but not with [[: > sw[["Moutier", "Agriculture"]] Error in .subset2(.subset2(x, ..2), ..1) : subscript out of bounds The problem is really with the row name (and not