search for: newdataframe

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2006 May 10
2
Concatenating data frame
Hello, I have searched through the R-help archive and find that the easiest way to concatenate data records in a dataframe is to use rbind() I know we can do that using rbind, but it is slow when we are doing rbind thousands of times to a growing list, each time adding one or two records to the ever growing existing data because in existingRecords<-rbind(existingRecords,
2006 May 10
1
help with writing output from two different arrays to two columns in an output file
Hi, I am very new to R and I have written the following block of code to generate a gamma distribution for variable x (which is an array) and a function "y" whose array values depend on the individual array values of "x". The code is as follows: n=1000 x=rgamma(n,1.5,2) y=vector("numeric",n) for (i in 1:n){ y[i]=(2937/50000*exp(-1/1000*x[i])/x[i]) } now I want to
2012 Jun 01
4
Adding a column into the file
Dear all, I have a lot of problems on R-programming. for example my csv. file is .. Date wrfRH wrfsolar wrfwindspeed wrfrain wrftd wrfta 21/10/2010 92.97 22.11 53.27 0 1546.337861 61.00852664 22/10/2010 87.35 21.99 40.89 0 1300.408288 62.85352227 23/10/2010 88.38 21.71 28.04 0.01 1381.768284 54.80594493 24/10/2010 92.32 15.45 22.38 0.51 1113.90981 39.46573663 25/10/2010 93.42