Recent questions tagged r

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r - geom_text how to position the text on bar as I want?

I would like to adjust the text on the barplot. I tried to adjust hjust/vjust to display as I like it but it seems like it's not working ... so it's readable without overlapping like the last parts. 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 - dplyr: lead() and lag() wrong when used with group_by()

I want to find the lead() and lag() element in each group, but had some wrong results. For example, data is like this: library(dplyr) df = data. ... result (the values, not just about the order)? Thanks~ 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 - Code chunk font size in Rmarkdown with knitr and latex

In knitr, the size option works fine in a .Rnw file, the following code generates: documentclass{article} egin{document} <<chunk1, size="huge">>= summary(mtcars ... .987, knitr 1.6 and rmarkdown 0.2.68. 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 test if list element exists?

Problem I would like to test if an element of a list exists, here is an example foo <- list(a=1) exists('foo') TRUE #foo does exist exists('foo$a' ... FALSE? Is use of with(...) the preferred approach? 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 - Plotting pca biplot with ggplot2

I wonder if it is possible to plot pca biplot results with ggplot2. Suppose if I want to display the following biplot results with ggplot2 fit <- ... (fit) Any help will be highly appreciated. Thanks 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 - Extract prediction band from lme fit

I have following model x <- rep(seq(0, 100, by=1), 10) y <- 15 + 2*rnorm(1010, 10, 4)*x + rnorm(1010, 20, 100) id ... intervals / prediction bands from the nlme object for the whole population? 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 hold figure position with figure caption in pdf output of knitr?

I am using knitr (1.9.5 and 1.9.17) and rmarkdown (0.5.3.1), and would like to hold figure position in the pdf output. The generated pdf file is working ... =8.5, fig.pos="H"} plot(cars) ``` More test 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 - Convert a dataframe to a vector (by rows)

I have a dataframe with numeric entries like this one test <- data.frame(x = c(26, 21, 20), y = c(34, 29, 28)) How can I get the following vector? > 26, 34, ... dim(test)[ 1 ]){ X <- cbind(X, test[i, ]) } 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 - Moving columns within a data.frame() without retyping

Is there a method for moving a column from one position in a data.frame to the next - without typing an entirely new data.frame() For example: a <- ... is there not a quicker way? (Imagine 1500+ columns) 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 faq - How to get help in R?

What is the possible documentation available for R package? For example I try to understand sp package. In addition to help(sp), what are the other functions for searching through help and documentation? 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 - Venn diagram proportional and color shading with semi-transparency

I have following type of count data. A 450 B 1800 A and B both 230 I want to develop a colorful (possibly semi-transparency at intersections) like the ... drawn in PowerPoint, and it is not to scale. 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 add ewpage in Rmarkdown in a smart way?

I wonder if one could simply use LaTeX ewpage command in R markdown v2 in a different way than this: ```{r, results='asis', echo=FALSE} cat( ... true toc_depth: 3 number_sections: true keep_tex: true --- 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 - promise already under evaluation: recursive default argument reference or earlier problems?

Here is my R code. The functions are defined as: f <- function(x, T) { 10 * sin(0.3 * x) * sin(1.3 * x ^ 2) + 0.001 ... arguments a good and safe practice or it may cause some potential trouble? 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 - Return data subset time frames within another timeframes?

There are very nifty ways of subsetting xts objects. For example, one can get all the data for all years, months, days but being strictly between 9 ... and years? Do any other subsetting tricks exist? 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 - Can dplyr join on multiple columns or composite key?

I realize that dplyr v3.0 allows you to join on different variables: left_join(x, y, by = c("a" = "b") will match x.a to y.b However, is it possible to ... concatenation of [x.a and x.c] to [y.b and y.d] See Question&Answers more detail:os...

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

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708 views

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r - Stepwise regression using p-values to drop variables with nonsignificant p-values

I want to perform a stepwise linear Regression using p-values as a selection criterion, e.g.: at each step dropping variables that have the highest ... if there is an already implemented version of this. 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 - Remove grid, background color, and top and right borders from ggplot2

I would like to reproduce the plot immediately below by using ggplot2. I can come close, but cannot remove the top and right borders. Below I present ... none) + opts( panel.border = theme_L_border()) 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 - Center Plot title in ggplot2

This simple code (and all my scripts from this morning) has started giving me an off center title in ggplot2: Ubuntu version: 16.04 R studio version: ... bill") + ggtitle("Average bill for 2 people") See Question&Answers more detail:os...

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

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863 views

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r - What's the difference between lapply and do.call?

I'm learning R recently and confused by two function: lapplyand do.call. It seems that they're just similar to map function in Lisp. But why are there ... Why doesn't R just use a function called map? 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 - merge data.frames based on year and fill in missing values

I have two data.frames that I want to merge together. The first is: datess <- seq(as.Date('2005-01-01'), as.Date('2009-12-31'), 'days') sample<- data ... abc 1 2005-01-03 abc 1 {cont} 2009-12-31 thanks 2 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 faq - Display exact value of a variable in R

> x <- 1.00042589212565 > x [1] 1.000426 If I wanted to print the exact value of x, how would I do it? Sorry if this is a dumb question. I ... I get are articles about how to round. Thank you in advance! 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 - Exactly storing large integers

In R software a <- 123456789123456789123456789 sprintf("%27f",a) #[1] "123456789123456791337762816.000000" I got the wrong answer. I want exact a value. Why is the system showing the wrong value of 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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966 views

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r - Dynamically add column names to data.table when aggregating

I know we can dynamically add column names when creating columns by reference (using :=), as described e.g. here: Dynamic column names in data.table. However, ... unexpected '=' in "test_dtb[ , list((m) = See Question&Answers more detail:os...

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

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852 views

1 answer

r - ggplot2 - adding secondary y-axis on top of a plot

For a publication I need to add a second y-axis to an existing plot. I've come across a means of how to do this (https://rpubs.com/kohske/ ... r") # Draw it grid.newpage() grid.draw(g1) See Question&Answers more detail:os...

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

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1.1k views

1 answer

r - Change values in multiple columns of a dataframe using a lookup table

I am trying to change the value of a number of columns at once using a lookup table. They all use the same lookup table. I know how to do ... function like LETTERS to solve things. Thank you in advance! See Question&Answers more detail:os...

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

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860 views

1 answer

r - Using get() with replacement functions

Can anyone explain to me why the following example occurs? #Create simple dataframe assign( "df" , data.frame( P = runif(5) , Q = runif(5) , R ... return the names (or NULL) of those objects. Thanks! See Question&Answers more detail:os...

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

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921 views

1 answer

r - Long Numbers As A Character String

As part of my dataset, one of the columns is a series of 24-digit numbers. Example: bigonumber <- 429382748394831049284934 When I import it using either data. ... I don't get to dictate that to them.) See Question&Answers more detail:os...

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

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1.1k views

1 answer

r - How to determine if date is a weekend or not (not using lubridate)

I have a vector of date objects (yyyy-mm-dd) and I want to determine if any of them are on weekend or not. Is there a function that can determine this ... 1) x[lubridate::wday(x) %in% c(1, 7)] See Question&Answers more detail:os...

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

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