Recent questions tagged R

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r - How to ignore NA in ifelse statement

I came to R from SAS, where numeric missing is set to infinity. So we can just say: positiveA = ... statement for character variables. 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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609 views

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r - How to rbind all the data.frames in your working environment?

I have over 50 data.frames in my working environment that I would like to rbind. Is there a way to ... data.frames in my working environment. See Question&Answers more detail:os...

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

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375 views

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r - How do I use tidyr to fill in completed rows within each value of a grouping variable?

Say I have data on people who choose between several options. I have one row per person, and I want to have one row ... # 9 3 11 2015-09-29 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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r - Intersect all possible combinations of list elements

I have a list of vectors: > l <- list(A=c("one", "two", "three", "four"), B=c("one", ... things together. Any help is much 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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612 views

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r - Contrasts can be applied only to factor

I have a question about R. I am using a test called levene.test to test a homogeneity of variance. I know that ... I run the test. thank you See Question&Answers more detail:os...

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

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278 views

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r - How is J() function implemented in data.table?

I recently learned about the elegant R package data.table. I am very curious to know how the J function ... is implemented? Many 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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336 views

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r - Joining factor levels of two columns

I have 2 columns of data with the same type of data (Strings). I want to join the levels of the columns. ie. ... awesome as far as I know :) 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 - Easily add an '(all)' facet to facet_wrap in ggplot2?

I have data that looks like this example in the facet_wrap documentation: (source: ggplot2.org) I would ... nrow arguments from facet_wrap. 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 - Using variable value as column name in data.frame or cbind

Is there a way in R to have a variable evaluated as a column name when creating a data frame (or in ... - a; which is aesthetically barftastic. 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 - Find matches of a vector of strings in another vector of strings

I'm trying to create a subset of a data frame of news articles that mention at least one element of a ... the elements of the keyword vector? See Question&Answers more detail:os...

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

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551 views

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r - Ordering stacks by size in a ggplot2 stacked bar graph

So i have a load of data which I have sampled as an example below: Sequence Abundance Length CAGTG 3 25 CGCTG 82 ... in the format that I have. 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 - scale/normalize columns by group

I have a data frame that looks like this: Store Temperature Unemployment Sum_Sales 1 1 42.31 8.106 1643691 ... be greatly 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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404 views

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r - Combining vectors of unequal length into a data frame

I have a list of vectors which are time series of inequal length. My ultimate goal is to plot the time ... unable to grasp the difference. See Question&Answers more detail:os...

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

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435 views

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r - Dplyr - Mutate dynamically named variables using other dynamically named variables

I am trying to create a new column with a dynamically created name and populate the field with an expression ... the column named value1_2016. See Question&Answers more detail:os...

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

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305 views

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r - How to account for leap years?

I have some doubts about the leap years, how can I be sure that by using a formula like this add.years= ... February are added with NA 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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614 views

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r - Adding a simple lm trend line to a ggplot boxplot

When adding a linear model trend line to a boxplot using standard R graphics I use: boxplot(iris[,2]~iris[,1 ... the iris dataset as an example. See Question&Answers more detail:os...

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

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892 views

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r - How to jitter both geom_line and geom_point by the same magnitude?

I have a ggplot2 linegraph with two lines featuring significant overlap. I'm trying to use position_jitterdodge( ... the geom_line jitter? See Question&Answers more detail:os...

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

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358 views

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r - dplyr::select() with some variables that may not exist in the data frame?

I have a helper function (say foo()) that will be run on various data frames that may or may not contain ... time to get my head around!) See Question&Answers more detail:os...

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

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294 views

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r - Three dimensional array to list

my question might sound trivial to quite a lot of you, but after a long internet search I still don't have ... much for your help! Best, Romain See Question&Answers more detail:os...

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

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552 views

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r - Why does dplyr's filter drop NA values from a factor variable?

When I use filter from the dplyr package to drop a level of a factor variable, filter also drops the NA values. ... not to drop the NA 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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366 views

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r - Why does is.vector() return TRUE for list?

I'm an R beginner. Browsing the R documentation, I stumbled upon this sentence ?is.vector: "If mode = "any ... datatype concept I'm not getting? See Question&Answers more detail:os...

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

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578 views

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r - Adding multiple columns in a dplyr mutate call

I have a data frame with a dot-separated character column: > set.seed(310366) > tst = data.frame(x=1:10 ... using mutate that I've 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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414 views

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r - Control speed of a gganimation

I want to slow the transition speed between states when using library(gganimate). Here is a mini example: # devtools: ... .1, state_length = 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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296 views

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r - Reverse and change limit of axis

I am trying to create a contour plot. I would like to have depth on the Y-axis and time on the X-axis. ... also set the limits of the axis. See Question&Answers more detail:os...

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

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381 views

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r - How to randomize a vector

I would like to randomly reorganize the order of the numbers in a vector, in a simple one-line command? My particular ... - rep(1:10, each=150) See Question&Answers more detail:os...

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

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397 views

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r - Adding multiple lag variables using dplyr and for loops

I have time series data that I'm predicting on, so I am creating lag variables to use in my statistical analysis. I ... for, then I am all ears. See Question&Answers more detail:os...

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

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615 views

1 answer

r - Gather in sparklyr

I am using sparklyr to manipulate some data. Given a, a<-tibble(id = rep(c(1,10), each = 10), attribute1 ... . Does anyone have an idea? Cheers! See Question&Answers more detail:os...

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

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506 views

1 answer

r - using lm in list column to predict new values using purrr

I am trying to add a column of predictions to a dataframe that has a list column that contains an lm model. I ... , but I just cant crack it. See Question&Answers more detail:os...

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

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