Recent questions tagged R

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r - create an arrow with gradient color

how can I create an arrow or segment with gradient color using R? 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 - Getting the observations in a rpart's node (i.e.: CART)

I would like to inspect all the observations that reached some node in an rpart decision tree. For example, in the ... on how to go about 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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324 views

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r - Converting to date in a character column that contains two date formats

I have CSV file with "date" column but it contains two different date format as the following 7/12/2015 15 ... the dates from each other? 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 - Count common words in two strings

I have two strings: a <- "Roy lives in Japan and travels to Africa" b <- "Roy travels Africa with this ... Any quick way, without using 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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r - addSMA not drawn on graph when called from function

I am a newbie for R and have got stuck here. I am trying to draw a graph with price, sma and ema. When I ... lines. What am I doing wrong here? 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 - Documentation for special variables in ggplot (..count.., ..density.., etc.)

The stats_ functions in ggplot2 create special variables, e.g. stat_bin2d creates a special variable called ..count ... StatBin2d$new(...). 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 - "unpacking" a factor list from a data.frame

I'm new to R / having the option to easily re-organize data, and have hunted around for a solution ... all variables used for facetting 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 - Create combinations of a binary vector

I would like to create all possible combinations of a binary vector made of a fixed number of 0 and 1. ... will increase explonentially with n) 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 - Filling under the a curve with ggplot graphs

I would like to create a graph with the normal function from x=-2 to x=2 filled under the curve ... same with geom_ribbon and other options. 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 - Create columns from column of list in data.table

I can't figure out how to do the following, crating a dynamic number of columns from a column of lists ... in the wrong environment I guess See Question&Answers more detail:os...

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

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373 views

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r - How to minimize size of object of class "lm" without compromising it being passed to predict()

I want to run lm() on a large dataset with 50M+ observations with 2 predictors. The analysis is run on ... information in memory and storage? 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 - Enclosing variables within for loop

So consider the following chunk of code which does not work as most people might expect it to #cartoon ... the local/current 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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r - Remove "Showing 1 to N of N Entries" Shiny DT

Issue: I'm looking to remove the showing 1 to n of n entries field in shiny DT. Please see picture below ... . Any insight is 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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716 views

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r - Histogram conditional fill color

I would like to make a histogram where the fill color changes depending on the low end of the bin. I do ... number of rows: 10000, 3568 See Question&Answers more detail:os...

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

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532 views

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r - Knitr: opts_chunk$set() not working in Rscript command

I'm using knitr to create a markdown file from Rmd and I have the following option set at the top of my ... Rscript at the command line? 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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451 views

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r - How does ggplot calculate its default breaks?

The title is relatively self explanatory. I would like to know how ggplot decides its default breaks (and ... help would be greatly 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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377 views

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r - write.csv() a list of unequally sized data.frames

I would like to pump out a list of data.frame() objects to a csv file so I can work on it for ... to have the same number of 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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321 views

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r - Update plot within observer loop in shiny application

I have written a simulation in R that I want to visualize with shiny now. I have put the main part of the simulation ... sinus, type="l") }) }) See Question&Answers more detail:os...

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

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495 views

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r - Include text control characters in plotmath expressions

Is there any way to get control characters for text strings, e.g. " " for newline evaluated inside a plotmath expression, ... ) ) , adj = 0 ) 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 - Is there a way to 'compress' an lm() object for later prediction?

Is there a way to 'compress' an object of class lm, so that I can save it to the disk and load it up ... have no effect on the saved file size. See Question&Answers more detail:os...

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

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337 views

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r - store arrangeGrob to object, does not create printable object

I want to save, but not print (for now), a bunch of ggplot()s into a grid (via arrangeGrob(), correct? ... gtable[layout] What is going on here? See Question&Answers more detail:os...

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

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326 views

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r - max and min functions that are similar to colMeans

I am wondering if there are high speed min and max function that works on columns similarly to colMeans? For ... colMeans in the base package. See Question&Answers more detail:os...

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

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427 views

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r - How to 'unlist' a column in a data.table

in my table, some cells are vectors instead of single value, i.e. the column is a list instead of ... to manage without any external 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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443 views

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r - Rscript could not find function

I need to run several scripts via the bash shell using Rscript and some functions I use require the function isGeneric. ... and how to fix 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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486 views

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r - How do I set factor levels to the order they appear in a data frame?

I want to create a heat map using ggplot however I want to order the y-axis by the number of observations. ... re-set factor levels each time. See Question&Answers more detail:os...

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

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304 views

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r - Replace character at certain location within string

Given a certain string, e.g., s = "tesX123", how can I replace a certain character at a certain location? ... ") which would result in test123? 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 - How to change name of factor levels?

training set trainSample <- cbind(data[1:980,1], data[1:980,2]) cl <- factor(c(data[1:980,3])) ... to represent which) Can anyone 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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257 views

1 answer

r - Generally disable dimension dropping for matrices?

As we all know, R tries to reduce matrices to vectors if its column- or row-dimension is 1. This ... dimension dropping for matrices in R? See Question&Answers more detail:os...

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

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