Recent questions tagged R

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r - How to nicely annotate a ggplot2 (manual)

Using ggplot2 I normally use geom_text and something like position=jitter to annotate my plots. However - for a nice ... there is a better way? 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 - Select first element of nested list

Let's say I have a list like this: x = list(list(1,2), list(3,4), list(5,6)) I would like a list ... [[1]]) Is there shortcut notation for 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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345 views

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r - two-column layouts in RStudio presentations/slidify/pandoc

I'm trying to come up with a good system for generating slides and accompanying handouts. The ideal system ... advice will also be 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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379 views

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r - List of ggplot2 theme options?

After some research I found the way to prevent an uninformative legend from displaying ... + theme(legend. ... default values for ggplot2? 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 - Administrative regions map of a country with ggmap and ggplot2

I can make USA state level unemployment graph with the following code. library(XML) library(ggplot2) library( ... Areas but without success. See Question&Answers more detail:os...

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

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568 views

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r - passing several arguments to FUN of lapply (and others *apply)

I have a question regarding passing multiple arguments to a function, when using lapply in R. When I use lapply ... ) and some other 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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330 views

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r - How do you delete a column by name in data.table?

To get rid of a column named "foo" in a data.frame, I can do: df <- df[-grep('foo', colnames(df)) ... a data.table object, this no longer works. 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 - What you can do with a data.frame that you can't with a data.table?

I just started using R, and came across data.table. I found it brilliant. A very naive question: Can ... syntax confusion between two packages? See Question&Answers more detail:os...

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

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473 views

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r - Hosting and setting up own shiny apps without shiny server

I'm trying to make shiny apps available to my coworkers without them having to run or even have R ... something ourselves to convince 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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399 views

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r - Add column with order counts

How do I add a column to my data frame that states the order count of occurrences of a value in another column? ... so on. Thanks for any 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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405 views

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r - Shiny not displaying ggplot data

I am new to working with shiny package. I am trying to use it to display a ggplot2 graph. I get no errors with ... input$y)) + geom_point() }) } See Question&Answers more detail:os...

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

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396 views

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r - Extract text after "/" in a data frame column

I have a data frame that has two columns Link and Value. The Link column has values like "abcd.com/efgh/ijkl/ ... So need some help on 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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620 views

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r - Recode categorical variable to binary (0/1)

Could someone help me regarding the use of ifelse. I have a data.frame (dat) with a categorical variable/factor ... way of doing this please? See Question&Answers more detail:os...

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

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295 views

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r - Issue involving map generation in shiny

Friends could help me resolve the following issue: I am inserting three executable codes below, the first generates a map using ... ,"Longitude")]) m1 <- m1 %>% addPolylines(da...

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

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340 views

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r - Access odd-named object returned by getSymbols

I'm downloading data from Yahoo using quantmod: > getSymbols("HNZ-A.TO") [1] "HNZ-A.TO" Warning message: In ... can I do to use this object? See Question&Answers more detail:os...

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

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574 views

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r - How to make gap between x and y axis and protruded ticks in ggplot2

How can I create the following style of graph: Notice the gap between x-y axis (red circle) and protruded ticks ... ) + theme_bw(base_size=10) p See Question&Answers more detail:os...

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

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374 views

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r - lapply-ing with the "$" function

I was going through some examples in hadley's guide to functionals, and came across an unexpected problem. Suppose ... somewhere on SO before. See Question&Answers more detail:os...

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

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517 views

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r - How to merge and sum two data frames

Here is my issue: df1 <- data.frame(x = 1:5, y = 2:6, z = 3:7) rownames(df1) <- LETTERS[ ... duplicated rows were added up by same variable. See Question&Answers more detail:os...

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

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421 views

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r - Spreading a two column data frame with tidyr

I have a data frame that looks like this: a b 1 x 8 2 x 6 3 y 3 4 y 4 5 z 5 6 z 6 and I want to ... NA NA 5 6 NA NA 6 What am I doing wrong? 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 - Is there anything wrong with using T & F instead of TRUE & FALSE?

I noticed that using T and F instead of TRUE and FALSE in functions in R gives me the same results. Of course, ... wrong with using T and F? See Question&Answers more detail:os...

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

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378 views

1 answer

r - How to extract certain columns from a list of data frames

I have a list 'l' of data frames. These data frames in itself are 2-dimensional matrices. For my work, ... I could go about implementing 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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703 views

1 answer

r - Combine several data frames in the global environment by row (rbind)

I am working on a project that imports all csv files from a given folder and merges them into one file. I ... a few extra minutes! 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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394 views

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r - Plotting a stacked bar plot?

I have the following data: structure(list(Time = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L ... above chart with both types. Any suggestions? See Question&Answers more detail:os...

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

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450 views

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r - How to delete rows where all the columns are zero

I have the following data frame dat <- data.frame(a = c(0,0,2,3), b= c(1,0,0,0), c=c(0,0,1,3)) Which ... a b c <0 rows> (or 0-length row.names) See Question&Answers more detail:os...

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

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311 views

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r - Combining `expression()` with ` `

I have a ggplot where I have used expression(phantom(x) >=80) in the label text to get a proper greater- ... the expression() with the escape ? See Question&Answers more detail:os...

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

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302 views

1 answer

r - How do I specify a dynamic position for the start of substring?

As in the example, I am trying to substring the Video_full column in a data.frame (video_data_2) I am working ... offer for a simple question. See Question&Answers more detail:os...

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

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297 views

1 answer

r - Split Data Frame into Rows of Fixed Size

I have a bunch of data frames with varying degrees of length, ranging from approx. 15,000 to 500,000. For ... can both be provided. 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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368 views

1 answer

r - Convert a character vector of mixed numbers, fractions, and integers to numeric

I'm trying to write an R function to convert fractions and mixed numbers to decimals. e.g. mixedToFloat <- ... more standard way to do 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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