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...have come across an error message in a very simple command that I am unable to resolve. I bring data in through excel .csv files and check them to be sure R reads them correctly and has everything assigned as it is in the excel file. It looks good. But simple computations are not working > sd(VIQ) Error in sd(VIQ) : object 'VIQ' not found I copied the object out of the R table of the data, I know it is correct. Thank you in advance and for understanding my greenness. Emily -- View this message in context: http://r.789695.n4.nabble.com/object-not-found-tp4546367p4546367.html Sen...

...for the Netherlands. In: Medinfo 2001 2001: 1334-1338. http://cmbi.bjmu.edu.cn/2001/medinfo_2001/Papers/Ch16/Goossen.pdf.) Questions and hints: - Is there already a ridit function in R? - Argument ``b.sel.attrs'' could be omitted. - Perhaps there are more efficient ways than calculating: viq.ridit <- apply( t( t(x) * vjq.ridit.attr ), 1, sum, na.rm=T ) / apply( x, 1, sum, na.rm=T ) - There seems to be a problem with the recursive call of CALC.ridit() when attr.groups is set to a dataframe with as many rows as there are columns in x (third example). (See also my questio...

...my requirement as follows, which is working for my 'brain' data set, whose output is reproduced below for your information please: > by(brain[,-1], INDICES=list(Gender=brain$Gender), FUN=function(x, na.rm=FALSE) sapply(x, mean, na.rm=na.rm), na.rm=TRUE) Gender: Female FSIQ VIQ PIQ Weight Height MRI_Count 111.900 109.450 110.450 137.200 65.765 862654.600 -------------------------------------------------------------------------------------------------- Gender: Male FSIQ VIQ PIQ Weight Height MRI_Count...

...ollows, which is working for my 'brain' data set, whose output is reproduced below for your information please: > > > by(brain[,-1], INDICES=list(Gender=brain$Gender), FUN=function(x, na.rm=FALSE) sapply(x, mean, na.rm=na.rm), na.rm=TRUE) > Gender: Female > FSIQ VIQ PIQ Weight Height MRI_Count > 111.900 109.450 110.450 137.200 65.765 862654.600 > -------------------------------------------------------------------------------------------------- > Gender: Male > FSIQ VIQ PIQ Weight...

...written by "Jim Albert and Maria Rizzo" published in Springers (2012) in a Use R! Series. The output of the by() function printed in the book is being reproduced below for information to all: > by(data=brain[, -1], INDICES=brain$Gender, FUN=mean, na.rm=TRUE) brain$Gender: Female FSIQ VIQ PIQ Weight Height MRI_Count 111.900 109.450 110.450 137.200 65.765 862654.600 ------------------------------------------------------------ brain$Gender: Male FSIQ VIQ PIQ Weight Height MRI_Count 115.00000 115.25000 111.60000 166.44444 71.43158 954855.40000 I do not know how could t...

...aria Rizzo" > published in Springers (2012) in a Use R! Series. The output of the by() > function printed in the book is being reproduced below for information to > all: > >> by(data=brain[, -1], INDICES=brain$Gender, FUN=mean, na.rm=TRUE) > brain$Gender: Female > FSIQ VIQ PIQ Weight Height MRI_Count > 111.900 109.450 110.450 137.200 65.765 862654.600 > ------------------------------------------------------------ > brain$Gender: Male > FSIQ VIQ PIQ Weight Height MRI_Count > 115.00000 115.25000 111.60000 166.44444 71.43158 954855.40000 &g...

...ther files with other licenses, most obviously many shell script files such as: regedit/hivexregedit sh/example* Also some Makefiles: perl/Makefile.am sh/Makefile.am ...etc... find . -type f | while read filename; \ do if grep -iqs 'general public license' $filename; then \ if grep -viqs 'lesser' $filename; then \ echo $filename; \ fi; fi; done | wc -l 223 Many of those 223 instances of 'general public license' without 'lesser' are from the build tools but there remain a significant number that appear to be project-specific. Is this a simple oversight...

...} if( any(subscripts) ){ if( ! is.null( col.x ) ){ x.levels <- unique( x ) col.x <- rep( col.x, length = length(x.levels) ) for( i.col in seq( along = x.levels ) ){ fe.grid.rect( sel = ( x[subscripts] == viq.x.levels[i.col] ) , fill = col.x[i.col] ) } }else if( ! is.null( col.y ) ){ y.levels <- unique( y ) col.y <- rep( col.y, length = length(y.levels) ) for( i.col in seq( along = y.levels ) ){...

I think you are not using the best function for what your intentions are. Try: > by(data=mtcars, INDICES=list(as.factor(mtcars$am)), FUN=colMeans) : 0 mpg cyl disp hp drat wt qsec vs 17.1473684 6.9473684 290.3789474 160.2631579 3.2863158 3.7688947 18.1831579 0.3684211 am gear carb 0.0000000

Dear Sirs, I am Professor at Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh, India. While taking classes, I found the *by() *function producing following error when I use FUN=mean or median and some other functions, however, FUN=summary works. Given below is the output of the example I used on a built-in dataset "mtcars", along with error message reproduced herewith: >

--Apple-Mail-44--797532055 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit I believe read.table may report misleading errors. In this example, where a header line in a file has an incorrect number of row names (28 instead of 29), I get the error message "duplicate row.names are not allowed". However, I cannot not find any

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