search for: coloumns

Dear Sir / Madam, I am new for R coding. Kindly help me out in sorting out the following problem. There are 50 rows with six coloumns(you could see in the attached .txt file). I wish to go for filtering this 50 rows for any one of the six coloumns satisfying the value >= 64. I need to have a final table with rows having >= 64 value in any one of the six coloumns and the rest could be <=64. For this purpose I use the fol...

As of R 1.7.0, princomp no longer accept matrices with more coloumns than rows. I'm curious: Why was this decision made? I work a lot with data where more coloumns than rows is more of a rule than an exception (for instance spectroscopic data). To me, princomp have two advantages above prcomp: 1) It has a predict method, and 2) it has a biplot method. A bip...

Hello, I am facing a problem in drawing heat map using R. I have a 70X3 matrix and I want to draw a heat map with 1 coloumn on X axis another on Y axis and want to show the value of 3rd coloumn using heat colours. Could you please help me with this . Thank you . Regards, Sumit [[alternative HTML version deleted]]

...ws and 104 columns 2) List2- a list of 14000 selected rownames  from List 1 Now, I want to extract all the 104 columns of List1  matching with the 14000 selected rownames from List2.  Psedocode will be something like this: match rownames(List2) with rownames(List1) extract selected matched 104 coloumns from (List1) strore in-> List3 So the resulting List3 will contain 14,000 rows and 104 coloumns. How do I do it in R ? Regards, P Barah Department of Biology, Norwegian University of Science & Technology (NTNU)  Realfagbygget, N-7491 Trondheim, Norway [[alternative HTML versio...

Hi, I'm writing for a little help. I have a dataframe with same NA value and I'd like to obtain the means of the value of a coloumn grouped by the levels of a factor coloumn of the datframe. I'm using the function "tapply" but I see that if only a NA value is present the result is NA. There is an option to have the correct result or I must use an other function? Thanks of

Hi I have a huge text file and .dat file from which I want to read data. I do not need all the columns in the files. I want to extract only some columns from the .txt file or the .dat file, because reading the entire file is becoming very difficult due to memory issues. Is it possible to extract a few columns from .txt or .dat file while reading the data in R? Thanks Upasna -- "The past

Hi every one, I have a text file like this: 1    4   4    1    6    23 1   4    2    2    3    28 1    4    5    1    2    24 1    2    3    1    1    24 1   2    3    1    2     40 1   2   3    1    4      22 I want to separate columns by comma, like this: 1,4,4,1,6,23 1,4,2,2,3,28 1,4,5,1,2,24 1,2,3,1,1,24 1,2,3,1,2,40 1,2,3,1,4,22   I used this code:

...t least not very... ;-) ), and I really don't need smoothing splines, but I figured, if smoothing splines is an extension of normal splines, it might do the job. If it can, may I then ask how? My problem: In the simplest case, I have two data.frames: For each of the data.frames The three first coloumns make up a 3D grid (I'd like to go up to at least 5), and the fourth coloumn contains the values for the point specified in the first three. The smaller data.frame, may have been generated by e.g. expand.grid(ntotalclouds=seq(1000000, 12000000, length=2), EW=seq(8,25...

Hi, I'd like plot a bar graphic of a array. I'd like to have the values of the single columns as juxtaposed bars (like in "barplot" with beside=TRUE) and I'd like to have the values of the single columns expressed like percentage of the sum of the coloumn. In this way all the bars are composed by the sum of the percentage of the values of a coloumn (with different colors)

  Hello list, i have a very simple question about matrix assignment. i did like this. res<-1:30 dim(res)<-c(5,6) ind<-1:6 now i want to assign the value of this variable ind to first coloumn in matrix res. like res[,1]<-ind but this code is giving error , Actualy i have a for loop and value of ind variable is changing every time ,,total 6 times,,i want to assign every vlaue

To my knowledge, this has not been reported previously, and doesn't seem to have been changed in R-devel or R-patched. If M is a matrix with coloumn names, and mod <- prcomp(M) # or princomp then predicting a single observation (row) with predict() gives the error Error in scale.default(newdata, object$center, object$scale) : length of 'center' must equal the number of

Hi to all, I'm new to this forum and new to R. I have to build a tree classifier that has boolean values as response. When I build the tree with: echoknn.tree <- tree(class ~ ., data=echoknn.train) where "class" is a coloumn of my dataset (echoknn.train) of boolean values, the result is a tree where leaf nodes are numbers in the range [0,1]; but this isn't the result that I

Hi, I need your help!! I imported a big coloumn vector from a txt file but it results as mode :"list" I want to change it in numeric otherwise I can't do my analysis. This is what i get: mode (data) <- "double" Error in eval(expr, envir, enclos) : (list) object cannot be coerced to type 'double' > Thanks a lot!!! Alessandra -- View this message in

problem in starting xend I tried to install xen, but got some errors when starting xend. as I logged in and tried to start xend (/etc/init.d/xend start). I just got six-seven dot (.) printed out, then it stops. I looked more closely and found that xend could not start. then I looked at /var/log/xend-debug.log. here is the last few lines: ^^^    Exception starting Xend: no element found:

Dear all, I have been trying to understand what runif() is telling me. I am generating lots of numbers (billions and billions (wow, I''ve dreamed about saying that for many years... :-) ), for a distribution that has the following quantile function: 1 / (2 * sqrt(1 - p)) (that is, the distribution has a lower cutoff) As you can imagine, this has rather heavy upper tail. I was

Hi all, I am getting problem with "read.csv()" command the problem is I have one file which is saved in "ANSI" while I am trying to open with R-Project its opend and all the cloumn names are comming proper like for the command names(kk) "FILEID" "UNIQUEID" "LATESTFLG" "ACTIVEFLG" "PROJROLEID"

Hi, I work with hyperspectral remote sensing data and I try to built a pls model with this data. I already built the model but if I try to calculate the RMSEP and R2 with a test data set I get the following error message: Error: variable 'subX' was fitted with type "nmatrix.501" but type "nmatrix.73" was supplied The problem is that I don't get the message for

I am having a similar problem understanding the data structure of the "yarn" dataset described in the "[R] data structure for plsr" posts. I have spectroscopic data I'd like to run through a PLSR and have read the tutorial series, but still do not understand the data format required for the code to process my data. My current data structure consists of a .csv file read into

Hi all i am facing a peculiar problem for data input using read.table which i never faced previously. i have a data file by name abnew.txt with two coloumns data as depicted below. A B 420 422 314 321 the txt file is created using the excel save as option. i issued the statement as > a <- read.table("abnew.txt", header=TRUE) > a X.??S 1 NA 2 2 3 2 4 NA 5 2 6 2 7 NA 8 2 9...

Dear R users, I have two coloumns of data, say x and y, referring to a list of points in 2D space. I am trying to develop a code that will give me the distances (using Pythagoras) between consecutive points (xi,yi) and (xi+1,yi+1). So far I have come up with the following: for (i in 1:length(x)) d<-sqrt((x[i+1]-x[i])^2+(y[i+1]-...