How can I align the two ggplots in the following function so that the x-axis is corresponding between the table and the graph ? As it is now the interval between the "ticks" is less in the table. Any ideas? //M Edit: Forgot to give credit to the learnr website for the table plotting method.... function ggkm: ggkm<-function(time,event...
Hi all, I´d like to count the number of changes of binary factor variable. This variable can change from time to time back and forth multiple times for every user id. Now I´d like to count he number of changes per user id to this variable over a given timespan. The data is sorted by id,year,month,myfactor. I tried this in MySQL but ha...
I have some data that looks like this: df <- data.frame(time=1:6, a=c(100, 90, 91, 92, 91, 91.5), b=c(99.9, 90.3, 90.9, 91.8, 92, 91.5), c=c(100.3, 88.5, 90.5, 91.5, 91, 91.3)) df <- data.frame(df, mean=apply(df[,2:4], 1, mean)) > df time a b c mean 1 1 100.0 99.9 100.3 100.06667 2 2 90.0 90.3 88.5 89.60000 3 ...
I'm using the bystat function from the Hmisc package in R. How can I extract attribute values and place them into variables. For example, I want to calculate mean and SD for variable aaf and put them in a dataframe or matrix. t <- with(d.aaf,bystats(y=aaf,plot_bid,fun=function(x) { c(Mean = round(mean(x),digits=2),SD = round(sd(...
I have a data set with some null values in one field. When I try to run a linear regression, it treats the integers in the field as category indicators, not numbers. E.g., for a field that contains no null values... summary(lm(rank ~ num_ays, data=a)), Returns: Coefficients: Estimate Std. Error t value Pr(>|t|) (Int...
Is it possible to update a dataset in a local, installed package? A package that I maintain has a dataset based on periodically-updated data. I would like to update the local version of my dataset and save the changes back to the package such that next time I load the data, i.e. data(xxx), the updated version of the dataset will load. ...
Hi All, I am busy writing a package for a customer with little knowledge about R. Given their complex data structure, I need to set up a "data base" within R containing tons of information obtained from a set of spreadsheets they get from another company. As they can't install SQL or so on their computers (ICT has some power control iss...
as title, I am working on some gregexpr in R now, I need to search for something start with a dot, so I need to use "." (without quote), but R keep saying that it is an unrecognized escape. What can I do? Thanks! ...
op <- options(warn=0) #although doesn't work for any value of warn assign("last.warning", NULL, envir = baseenv()) thisDoesntWork<- function() { warning("HEY, this is definitely a warning!") cat(paste("number of warnings:",length(warnings()))) } >thisDoesntWork() Warning in thisDoesntWork() : HEY, this is definitely a warning! numb...
I wonder if there is a better way to put two data.frames into one, treating the rownames as if it was a column and then merge by this column with some other data.frame. I know I could do the following df1$rn <- row(df1) all <- merge(df1,df2, by.x="rn", by.y="some_column") I mean this produces redundant data (rownames as column) whi...
Hi, I'm trying to transform a 3D array into a matrix. I want the third dimension of the array to form the first row in the matrix, and this third dimension should be read by row (i.e., row 1, then row 2 etc... of dimension 3 should make up the first row of the matrix). I've given an example below, where the array has dimensions of 4, 3, ...
I have a dummy list here: > x <- c("a", "b", "c") > y <- c("d", "e", "f") > z <- list(x,y) > z [[1]] [1] "a" "b" "c" [[2]] [1] "d" "e" "f" If I want to assign another variable (e.g. w) to hold the last item (i.e. "c", "f") of all vectors (i.e. x, y) inside the list (i.e. z), how can I do that? Thanks! ...
Let's presuppose that you have R running with root/admin privileges. What R calls do you consider harmful, apart from system() and file.*()? This is a platform-specific question, I'm running Linux, so I'm interested in Linux-specific security leaks. I will understand if you block discussions about R, since this post can easily emerge in...
Dear Stackoverflow users, I'm trying to perform GLM (Generalized linear model) repeatedly within a python script (within a loop). 1- I tried to use Stats within Scipy glm function but description is quite inexistant and I think I did not use it well --> error message "ValueError: only ttest_ind implemented". I searched within stats.py f...
I'm using geom_density to plot densities with very thin tails. I want to restrict the y-axis range (so the top of the distribution will be off screen and the tail is more clearly visible) but it's throwing away data that is off-screen when it calculate the density, rather than just not showing what is off screen. E.g. This plots the f...
Given a series of randomly generated data how can I figure out how random it actually is? Is R-lang a good tool for this matlab? What other questions can can these tools answer about randomly generated data? Is there another tool better for this? ...
I need to read a data frame from a file containing NULL values. Here's an example file: charCol floatCol intCol a 1.5 10 b NULL 3 c 3.9 NULL d -3.4 4 I read this file into a data frame: > df <- read.table('example.dat', header=TRUE) But "NULL" entries are not interpreted by R as NULL: > i...
Hi, I have two tables. Both are read using the read.table() function. Table 1 A B C S1 1 1 0 S2 2 0 NA S3 0 2 1 Table 2 Pa Pb Pc G1 0.12 0.65 0.001 G2 0.34 0.82 0.03 G3 0.2 0.64 0.87 I need to iterate over both tables. Specifically, I need to iterate over table one column-wise an...
Hi, I'm relatively new to R, and was wondering the most efficient way to iteratively construct a dataframe (one row at a time, the number of iterations "n" and the length of each row "l" are known beforehand). Create empty dataframe, add a row each iteration Preallocate n x l dataframe, modify a row each iteration Preallocate n x l mat...
I have 13 matrices of various dimensions that i'd like to use in pairwise matrix correlations with a custom function (that calculates the Rv coefficient). The function takes two arguments (matrix1, matrix2) and produces a scalar (basically a multivariate r value). I'd like to run the function on all possible pairs of matrices (so 78 corr...