Recent questions tagged R

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r - How to delete columns that contain ONLY NAs?

I have a data.frame containing some columns with all NA values, how can I delete them from the data. ... ) specifying some additional arguments? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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407 views

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r - Solution. How to install_github when there is a proxy

When you try to install some package of R from GitHub's repository install_github('rWBclimate', 'ropensci') If ... on Intenet through a proxy. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - How to save data file into .RData?

I want to save data into an .RData file. For instance, I'd like to save into 1.RData with two csv files ... of RData with csv files and values? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - How to choose variable to display in tooltip when using ggplotly?

I have a simple data frame: seq <- 1:10 name <- c(paste0("company",1:10)) value <- c(250,125, ... I haven't found answer working with ggplotly. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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364 views

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r - Set certain values to NA with dplyr

I'm trying to figure out a simple way to do something like this with dplyr (data set = dat, variable = x): day$x ... mutate(x=ifelse(x<0,NA,x)) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Geometric Mean: is there a built-in?

I tried to find a built-in for geometric mean but couldn't. (Obviously a built-in isn't going to save me any time ... ){prod(a)^(1/length(a))} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Fully reproducible parallel models using caret

When I run 2 random forests in caret, I get the exact same results if I set a random seed: library(caret) ... , so why not model1 and model2? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Prevent row names to be written to file when using write.csv

Commands: t <- data.frame(v = 5:1, v2 = 9:5) write.csv(t, "t.csv") Resulting file: # "","v", ... with row index from being written to the file? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - How do I change the background color of a plot made with ggplot2

By default, ggplot2 produces plots with a grey background. How do I change the color of the background of the plot ... =b)) + geom_line() myplot See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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467 views

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r - How can I arrange an arbitrary number of ggplots using grid.arrange?

This is cross-posted on the ggplot2 google group My situation is that I'm working on a function that outputs an ... harder than it needs to be. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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440 views

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r - How to count TRUE values in a logical vector

In R, what is the most efficient/idiomatic way to count the number of TRUE values in a logical vector? I ... ? Is there anything even better? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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362 views

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r - How do I change the formatting of numbers on an axis with ggplot?

I'm using R and ggplot to draw a scatterplot of some data, all is fine except that the numbers on the ... crossbar") Any help much appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Difference between as.POSIXct/as.POSIXlt and strptime for converting character vectors to POSIXct/POSIXlt

I have followed a number of questions here that asks about how to convert character vectors to datetime classes. ... them that I missed? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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339 views

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r - Create a matrix of scatterplots (pairs() equivalent) in ggplot2

Is it possible to plot a matrix of scatter plots with ggplot2, using ggplot's nice features like mapping ... to the base function pairs. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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219 views

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r - Should I use a data.frame or a matrix?

When should one use a data.frame, and when is it better to use a matrix? Both keep data in a rectangular ... when to use which data type? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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286 views

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r - How can I remove an element from a list?

I have a list and I want to remove a single element from it. How can I do this? I've tried looking ... and I haven't found anything appropriate. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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470 views

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r - Set margin size when converting from Markdown to PDF with pandoc

I have created an RMarkdown file in RStudio and managed to knit it with knitr into an HTML and .md file. ... but haven't found anything useful. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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352 views

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r - How to access the last value in a vector?

Suppose I have a vector that is nested in a dataframe one or two levels. Is there a quick and ... of dat$vec1$vec2[length(dat$vec1$vec2)] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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r - How can we make xkcd style graphs?

Apparently, folk have figured out how to make xkcd style graphs in Mathematica and in LaTeX. Can we do it in ... to take a jitter-like argument? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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336 views

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r - the condition has length > 1 and only the first element will be used in if else statement

pred=data.frame(seq(1,100,by=2)) obs=data.frame(seq(1,100,by=3)) pr=data.frame(seq(1,200,by=4 ... first element will be used" any alternatives?? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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407 views

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r - Subsetting data.table using variables with same name as column

I want to subset a data.table using a variable which has the same name as the column which leeds to some ... is there another elegant solution? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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343 views

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r - 'Reset inputs' button in shiny app

I would like to implement a 'Reset inputs' button in my shiny app. Here is an example with just two inputs ... ' of handling the action buttons? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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481 views

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r - meaning of ddply error: 'names' attribute [9] must be the same length as the vector [1]

I'm going through Machine Learning for Hackers, and I am stuck at this line: from.weight <- ddply(priority.train, ... <- tmp > rm(tmp) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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357 views

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r - How to add different lines for facets

I have data where I look at the difference in growth between a monoculture and a mixed culture for two different ... the graph I create now: See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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348 views

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r - Merge Panel data to get balanced panel data

I have several data frames in panel data form. Now I want to merge these panel data frames into one ... would really appreciate your help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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292 views

1 answer

r - Removing one tableGrob when applied to a box plot with a facet_wrap

I'm using the code below to enrich a box plot with a summary table for categorical variable created on the x- ... the left hand side to appear. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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219 views

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r - How to use data.table within functions and loops?

While assessing the utility of data.table (vs. dplyr), a critical factor is the ability to use it within ... used within functions and loops?. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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339 views

1 answer

r - Combine values in huge XML-files

I need to find and combine information in some huge XML-files (doc <- xmlInternalTreeParse(file.name, useInternalNodes ... levels to find info. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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