Creating a table from summarized data using dplyr
I want to create a summary table from summarized data using dplyr.library(dplyr) mtcars %>% group_by(cyl, gear) %>% summarise(avg_wt = mean(wt)) Here's the output:# A tibble: 8 x 3 # Groups: cyl...
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How to obtain the tree from igraph object in R?
I have a random directed weighted graph gg, it has the next structure:gg <- structure(list(10, TRUE, c(0, 0, 1, 2, 2, 5, 5, 6, 6, 6, 6, 9, 9, 9, 9, 9), c(6, 9, 3, 0, 5, 3, 7, 1, 3, 5, 8, 2, 4, 6, 7,...
View ArticleHow to divide dataset in r randomly
I have a dataset of around 50 contiguous days. I want to divide it into training and test data sets, such that each 5 of the days of the week are in the training set, and 2 of the days of the week are...
View ArticleObtain predictions at new points in geographically weighted regression in r
I have a list of observed points at which I wish to estimate a geographically weighted regression. I then have a separate and distinct set of points at which I want to make a prediction, using this...
View ArticleSeparating data within a cell and duplicating row data
I have data that is within one cell, separated by spaces. For example, there is one column with city name such as "New York, NY" and then another column with the zip codes "12345 67891 23456". What is...
View ArticleAlternative to plyr::mapvalues in data.table
I am looking for a readable alternative to plyr::mapvalues in data.table.For example, in plyr::mapvalues, if I would like to change the values of carb in mtcars to type1, type2, type3, I would do...
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How do I remove the tibble from an image?
I am trying to upload an image in to a R Markdown template but every time I try to do so the tibble is added above the image and I don't know how to remove the tibble while keeping the image how it is....
View ArticleDplyr: subset rows with first observation after a given occurence
I am trying to accomplish the following:1) group data by id2) remove any rows after '3' occurs.3) find the closest '1','2' or NA that precedes '3' and only keep that row.My data: data <- data.frame(...
View ArticleCombining multiple .csv in R with numeric and non numeric values in R
I'm trying to combine multiple .csv files into one in a nice and easy script. Currently, I have the code data_files = list.files(path=file_source, pattern = "*.csv", full.names = TRUE) %>%...
View Articlehow to create a confusion matrix for xgboost in R
I have already created my XGBoost classifier in R as in below code#importing the dataset XGBoostDataSet_Hr_Admin_8 <- read.csv("CompletedDataImputed_HR_Admin.csv") #Use factor function to convert...
View ArticleCRAN rejection based on "references describing the methods in your package"
I received this cryptic CRAN message : Thanks,If there are references describing the methods in your package, please add these in the description field of your DESCRIPTION file in the form authors...
View ArticleError running LightGBM in R "does not support constructing from ‘data.frame’"
I finally installed LightGBM in R, but I can't quite get it to work. Below is a simple reproducible example using the iris dataset.I'm using R version 3.5.2 on windows 10 and...
View ArticlePattern greater less than sign
I want to clean special characters from variable.mm = data.frame(rule = c('$X <= 0', '$X > 0 & $X <= 17.5', '> 17.5 & $X <= 197.3', '$X > 197.3')) mm$ruleclean <-...
View ArticleHow can I change axis labels from scientific format to power format using...
I'm creating a chart in ggplot and want to change my x-axis ticks from scientific format to 10^n, 20^n, 30^n etc format without changing my axis to a log scale. I've copied code from the comments...
View Articleis there a way to display my project in r.io
R-shiny project doesn't display in rshiny.io, all tables and plots... btw the tables are found in the global environment ... below is the code i used to import my tables ......
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Condense multiple observations into distinct events based on time threshold
This is a subset of the data I'm working with: structure(list(user_login = structure(c(7L, 7L, 7L, 7L, 4L, 4L, 4L, 4L, 1L, 1L, 1L, 1L, 5L, 5L, 5L, 5L, 5L, 2L, 2L, 2L, 2L, 6L, 6L, 6L, 3L), .Label =...
View ArticleJoin multiple tables dynamically
The problemHi all,I am trying to join a few dataframes together dynamically. For me that means that I have a dataframe that I start with df_A, to which I want to join multiple other dataframesdf_B1,...
View ArticleExtracting values for specific lat long from netcdf
I'm trying to read into R a netCDF file. The netcdf chirps-v2.0.1981.days_p05.nc is downloaded from here:ftp://ftp.chg.ucsb.edu/pub/org/chg/products/CHIRPS-2.0/global_daily/netcdf/p05/This netCDF file...
View ArticleWhat is integer overflow in R and how can it happen?
I have some calculation going on and get the following warning (i.e. not an error): Warning messages: 1: In sum(myvar, na.rm = T) : Integer overflow - use sum(as.numeric(.)) In this thread people state...
View Articlerotating axis labels in R
In R, how do I make a (bar)plot's y axis labels parallel to the X axis instead of parallel to the Y axis?
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