# Questions tagged [r]

R is a free, open source programming language and software environment for statistical computing and graphics.

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35 views

### Comparing univariable regression results between complete-case and multiple imput data sets

Dear Code Review community, I try to develop a reproducible code to pool univariable regression estimates across multiple imputed data sets in R. I therefore prepared the following code that is ...
40 views

### Forecast the turnover with a prophet model in R

I am a student who is interested in data analytics and currently figuring out how to write forecast models for several scenarios in R. I'm working on a fictitious project in which I want to forecast ...
1 vote
93 views

### Filtering spatial data based on a distance matrix from large datasets

I am using a R function to spatially filter location points. There are five steps in the function: 1) calculate the distance between all points, 2) for each point, define the number of neighboring ...
32 views

### Transform variables based on a constant in another object

My problem I am working with two objects, structured as follows: ...
1 vote
23 views

### LASSO kernel for nonparametric models

I am a novice in nonparametric modeling and have recently begun exploring the world of varying coefficient models. Essentially, these models involve a non-linear least squares problem that relies on ...
1 vote
56 views

### Optimize an algorithm for preparing a dataset for machine learning

I'm learning how to use R coming from a python background. I'm following Andrej Karpathy's zero-to-hero course, reimplementing it in R. We start with a list of 32033 names. These names have to be ...
1 vote
328 views

### R function to sort columns of gtsummary::tbl_summary objects

I work with gtsummary package a lot and wanted to try creating a function to sort the columns of table output from tbl_summary() ...
51 views

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1 vote
70 views

### Group uncorrelated variables into subsets using correlation matrix

I am trying to group uncorrelated variables into subsets. So, using the correlation matrix, I check each variable to see the correlation. If correlation is more then a threshold I will create a new ...
88 views

### Convert dataset from wide to a longer format for two different set of columns

I have a dataset that is a bit too wide for the EDA plots I would like to make. The data can be found here: https://www.massey.ac.nz/~kgovinda/data/Bill_Colour.RData But looks something like this: ...
578 views

### Python+R Project: Fantasy Football Power Rankings Graphic Generator

I am in a fantasy football league and each week I send out a power rankings poll through Microsoft Forms. People will send in their rankings poll and I will create a graphic based on responses. I was ...
58 views

### Calculate number of max and min outliers from data.frame

I am working on a problem where I need to get specific information for min and max outliers. This is in relation to the ggplot library. I will be getting all my information from ggplot_build object. ...
62 views

### How can I can do better with my R code to analyze word counts

I am new to R and to learn I start to code to do things that interest me. I have a biological background and I am very interested in bioinformatics. I know some python, but I want to use R as tool to ...
28 views

### Remake fs path() in pure R

My first post here, where I would like to create a function similar to path() in fs package. fs is based on the external C library libuv, but I need path() in ...
1 vote
204 views

### Find Reddit comments with a particular keyword

I am writing a loop (in R) to webscrape Reddit posts - using Reddit's API ("Pushshift"). Essentially, I would like to get every comment that contains the word "Trump" between now ...
1 vote
62 views

### convert GPS coordinates to C-SQUARES, resolution 0.05°×0.05°

This is a simple C-Squares encoder in R. FYI, C-Squares is a geocoding algorithm that assigns GPS coordinates to a spatial grid with a chosen resolution. Its specifications is here: https://www.cmar....
63 views

### S_n covariance calculation function

I am trying to understand the estimator proposed in ["Multidimensional outlier detection and robust estimation using Sn covariance"]. I wrote the code in a basic line-by-line form which ...
47 views

### Plot ellipse hypothesis plots with confidence intervals for multiple models

I have developed a function to graphically plot between two predictors of interest their confidence interval regions on an ellipse. It states whether the null hypotheses have been accepted for the one-...
111 views

### All permutations of a linear model given all predictors

I have developed a fairly large function that can do the following: From a dataset, select the response variable and the independent variables. Get all the number of permutations for the formula ...
39 views

### R: Function to return the category that has the maximum in another variable [closed]

Is there a nice simple function to return which diet has the highest average? I can calculate the means from each diet using: ...
1 vote
57 views

### Extract, transform, and load Excel files

I am curious to know if there is a cleaner/better way to write this. Any suggestions would be greatly appreciated! I do ask some questions in comments within the code specific to certain functions/...
1 vote
62 views

### R code to calculate coef

Can you help me think of some way to reduce the computational time of a code that generates a certain value, which in this case I call coef, which will depend on <...
1 vote
37 views

### Another solution approach to find if trailing zeros exist for each row id

The code below removes trailing zeros exist for each row id. This question has been resolved here https://stackoverflow.com/questions/69452882/delete-column-depending-on-the-date-and-code-you-choose. ...
47 views

### calculating all prime numbers up to a given number

This program calculates all prime numbers up to n. However it runs pretty slowly. I was wondering if there was any optimisations I could make. ...
52 views

### Mapping variables in two data frames using a third data frame

I have two data frames, df1 and df2 of identical structure. The first three columns, id, <...
359 views

### Create a folder with subfolders and files from a R dataframe

I have such a dataframe: ...
56 views

### A function that modifies the column types of a data.frame, given a character vector of "format codes"

Problem A business process requires me to read two different text files (raw and processed) into R as data.frames, with each column being read as a character type. ...
1 vote
64 views

### How can I simplify the code using just the tidyverse?

So I have the data frame below, and I'm trying to creat a new Data frame which show me the name of the department which have the highest and the lowest employee turnover. The code that I write is ...
53 views

### Faster way to print Number of Descents in a permutation in R

I am trying to find a more efficient way to print the number of descents in a permutation using R as my programming language. This code does it for the numbers 3 to 10: ...
45 views

### R language optimize converting mpfr to gmp

I wrote a function to convert, without loss of precision, a mpfr - class value to a gmp bigq value. (This particular operation ...
1 vote
65 views

### Conditionally drop rows in grouped data.frame using dplyr in R

I have a data frame with columns for three predictors that try to predict the target variable 'change' with values 'yes' and 'no'. The data frame is grouped by id, and for every id, I have 4 years. ...
78 views

### How can I make this code more efficient

i try to get the row count for last three column (Kindly refer the below image ).I have done using for loop but the concern is it takes so much of time to execute in my application, and i heard apply ...
119 views

### Assign 0 or 1 with different probabilities conditional on another column in R

I am trying to assign a 0 or 1 with some stochasticity based on another column in a data frame (outcome). If outcome == 1, the ...
1 vote
58 views

### Estimating risk differences for marginal models

I need to estimate risk differences for marginal models. I have worked on the Probratio function to create an equivalent function for RDs that works. Please provide feedback on accuracy or comments to ...
1 vote
44 views

### Combine several calculations on several variables

This is my very first time here, I am coming from stackoverflow.com thanks to @r2evans. So I apologize in advance if I don't follow all the rules. I wrote a code in ...
56 views

### Increase speed of lapply function identifying the sum of all existing combinations

I have a dataframe of cases that score 0-1 on a group of binary attributes. What I want to do is extract all possible ombinations of attribute triplets (e.g. A/B/C, A/B/D... out of A-E) and then sum ...
29 views

### Transform dataframe to a certain JSON format

I need to go from this dataframe: ...
87 views

### Simulating disease spread in a population

I am trying to build a model that allows me to estimate the spread of disease in the population. The setup is similar to the SIR model, with the difference that this model includes the stochastic ...
285 views

### An efficient way for removing rows with zero elements iteratively while constructing the matrix

Based on a previous post, Accelerating creation of matrices and finding ways for optimal scaling, we managed to accelerate the way that I construct a matrix in Rcpp (inputs for example are at the end ...
56 views

### R code for reading tabular data files and plotting light curves of modeled stars

Here is a minimal example of my task... I have four 2-column files. profile1.data ...
1 vote
38 views

### R code for reading tabular data files and plotting light curves of modeled stars

I am given a file named profile1.data that looks like this: ...
1 vote
69 views

### Accelerating creation of matrices and finding ways for optimal scaling

I have the following specific task, for which I have written code, in Rcpp, but it doesn't scale well and I would like to improve it. I'll describe first the steps of the procedure Step 1: We have ...
1 vote
65 views

### R coding: creating a name variable to use with select

I am wondering if this is correct: ...
70 views

### R code optimization

I have about 977 obs in top500Stocks which contains name of 977 stocks. ...
236 views

### Find if a dataset of words contains any words containing all vowels by using exactly 5 calls to str_detect

Take the words dataset from stringr. An R4DS exercise challenges the reader to check if there are any words in that dataset that ...
1 vote
37 views

### using R probability

I am working on the subject of the French championship 2019, composed of 20 teams, and each team plays 38 times, if team A plays with team B, whatever the result, each team plays another time with ...
126 views

### Rcpp sparse CSC matrix class

This is a sparse matrix (dgCMatrix) class that extends Rcpp. WHAT: This class includes Rcpp::NumericVector and ...
1 vote
69 views

### R Container for Multiple data.frame with a Brief Description of the Content of the data.frame

For a project I have a large dataset with a multitude of variables from different questionnaires. Not all variables are required for all analyses. So I created a preprocessing script, in which subsets ...