Recent questions tagged R

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r - Use endpoints function to get start points instead?

I have an xts object called Daily_Quotes that contains stock quotes. I'm using endpoints to get monthly stock ... attempt to solve this ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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531 views

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r - How to filter cases in a data.table by multiple conditions defined in another data.table

I wondered whether there is any efficient way to filter a data.table by multiple conditions defined in another data. ... it by some other way. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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653 views

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r - Cumulative total by group

For the following dataset: d = data.frame(date = as.Date(as.Date('2015-01-01'):as.Date('2015-04-10'), ... Surely R can do better than this?? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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591 views

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r - converting numbers to time

I entered my data by hand, and to save time I didn't include any punctuation in my times. So, for example, ... to find it. Then criticize away. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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430 views

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r - Creating an "other" field

Right now, I have the following data.frame which was created by original.df %.% group_by(Category) %.% tally ... flexible ways to choose Other. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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r - Split a data frame column containing a list into multiple columns using dplyr (or otherwise)

Consider the following example data library(dplyr) tmp <- mtcars %>% group_by(cyl) %>% summarise(mpg_sum = ... names with dplyr, or otherwise? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Removing a group of words from a character vector

Let's say that I have a character vector of random names. I also have another character vector with a number of car ... part of a string in R? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

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r - import all the functions of a package except one when building a package

I'm building an R package (mypackage) that imports data.table and another package (let's call it myotherpackage) ... the package. Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

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r - Replace every single character at the start of string that matches a regex pattern

I want to replace every single character in a string that matches a certain pattern. Take the following string ... Can anyone help me out? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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507 views

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r - how to download a large binary file with RCurl *after* server authentication

i originally asked this question about performing this task with the httr package, but i don't think it's ... otherwise works.. to break? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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590 views

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r - modify lm or loess function to use it within ggplot2's geom_smooth

I need to modify the lm (or eventually loess) function so I can use it in ggplot2's geom_smooth (or ... put inside the return() call. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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693 views

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r - Using melt with matrix or data.frame gives different output

Consider the following code: set.seed(1) M = matrix(rnorm(9), ncol = 3) dimnames(M) = list(LETTERS[1:3 ... the first result using a data.frame? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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631 views

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r - repeating vector of letters

Is there a function to create a repeating list of letters in R? something like letters[1:30] [1] "a" "b" "c" " ... continue aa, bb, cc, dd ... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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634 views

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r - Using the %>% pipe, and dot (.) notation

When using map on a nested data_frame, I do not understand why the latter two version give an error, how should I use ... df %>% map(data, min) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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454 views

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r - Avoid copying the whole vector when replacing an element (a[1] <- 2)

When replacing an element in a vector such as a <- 1:1000000 a[1] <- 2 R copies the whole vector, ... behave something more like c array? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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772 views

1 answer

r - Space between gpplot2 horizontal legend elements

I have a ggplot2 plot as follows: library(ggplot2) ggplot(mtcars, aes(factor(cyl), fill=factor(cyl))) + ... the fill elements as follows: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

1 answer

r - Add hline with population median for each facet

I'd like to plot a horizontal facet-wide line with the population median of that facet. I tried the approach without ... I'd like to avoid it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

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r - Shiny - how to change the font size in select tags?

How can I change the font size in select tags? I tried with this code below but the font size does not change at all. ... ..) ), .... Any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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555 views

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r - Why do rapply and lapply handle NULL differently?

I'm aware that NULL values in lists can sometimes trip people up. I'm curious why in a specific instance ... so differently in this case? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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852 views

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r - Rmarkdown setting the position of kable

I have the following issue, once knitting the Rmarkdown in Rstudio to PDF, my tables appear not in the position ... Speed vs distance") ``` See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

r - Caret: There were missing values in resampled performance measures

I am running caret's neural network on the Bike Sharing dataset and I get the following error message: In ... FALSE) Thanks for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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524 views

1 answer

r - Extract text name from String

I have a column with value as "RED LOBSTER CA04606" or "Red Lobster NewYork WY245" n so on How can I ... Any help is highly appreciated. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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632 views

1 answer

r - Plot Event sequences / Event Sequences Clustering

Perhaps this is a veru dull question, but I did my research on it and couldn't find an answer. I want ... methods to event sequences ? thanks ! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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528 views

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r - Converting date column in data frame

R version: 3.1.0 The following threads have been read: - format a Date column in a Data Frame - ... PerformanceAnalytics needs this as input. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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629 views

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r - Condition Filter in dplyr based on Shiny input

I'm creating a reporting tool for an online market. I want to add a checkbox, "Coupon", where only ... observations when it's not checked? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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813 views

1 answer

r - creating igraph with isolated nodes

I have a similiar problem to this one: Reading adjacency lists with isolated nodes using igraph I want to ... solution would be welcome. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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911 views

1 answer

r - Set frequency in xts object

I want to create an xts object in R, which I then want to decompose to seasonal and trend. > require(xts) > ... . Did I set the wrong frequency? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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813 views

1 answer

r - Global legend using grid.arrange (gridExtra) and lattice based plots

I am producing four plots using xyplot (lattice) and further combine them with grid.arrange (gridExtra). I would like ... .g. xyplot? Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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