Recent questions tagged R

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r - Colorize parts of the title in a plot

Is it possible to colorize parts of the title in a plot? x = 1:10 y = 1:10 plot(x, y, main="title ( ... to change the color of slope=1 to red. See Question&Answers more detail:os...

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

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633 views

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r - Calculating weighted mean and standard deviation

I have a time series x_0 ... x_t. I would like to compute the exponentially weighted variance of the data. ... this corresponds to in R? 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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323 views

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r - Knitr & Rmarkdown docx tables

When using knitr and rmarkdown together to create a word document you can use an existing document to style the ... that process if possible. See Question&Answers more detail:os...

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

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361 views

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r - Dynamic height and width for knitr plots

In knitr, one can specify the size of plot by simply specifying it in the chunk options. For example: ```{r, ... be equal to length(unique(x$x)) See Question&Answers more detail:os...

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

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537 views

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r - Better error message for stopifnot?

I am using stopifnot and I understand it just returns the first value that was not TRUE. I f that is some ... do not have the same length!? See Question&Answers more detail:os...

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

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349 views

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r - Split a string vector at whitespace

I have the following vector: tmp3 <- c("1500 2", "1500 1", "1510 2", "1510 1", "1520 2", "1520 1", "1530 2", "1530 ... : c(2,1,2,1,2,1,2,1,2,1) See Question&Answers more detail:os...

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

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357 views

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r - Saving a JSON object to file.JSON

I've create a JSON file, and I need to be able to share the file via email with other collaborators. ... Any help would be greatly appreciated. See Question&Answers more detail:os...

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

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351 views

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r - How do I use plyr to number rows?

Basically I want an autoincremented id column based on my cohorts - in this case .(kmer, cvCut) > myDataFrame ... 600001 127 23 2 47124570 2 See Question&Answers more detail:os...

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

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331 views

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r - Can i host a shiny app on a windows machine?

I've registered for the beta hosting. I've tried to follow the directions for creating the shinyapps/myapp ... on a windows machine? 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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386 views

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r - Rolling window over irregular time series

I have an irregular time series of events (posts) using xts, and I want to calculate the number of events that ... large. What should I do? See Question&Answers more detail:os...

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

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280 views

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r - Problems using foreach parallelization

I'm trying to compare parallelization options. Specifically, I'm comparing the standard SNOW and mulitcore ... why? Thanks, Charlie See Question&Answers more detail:os...

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

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405 views

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r - How to change knitr options mid chunk

Hi I would like to change chunk options, mid chunk, without having to create a new chunk.. running the following ... 13 stringr_0.6 tools_2.15.1 See Question&Answers more detail:os...

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

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460 views

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r - mgcv: How to set number and / or locations of knots for splines

I want to use function gam in mgcv packages: x <- seq(0,60, len =600) y <- seq(0,1, len=600) ... are the knots that the spline used? 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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376 views

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r - Why does rendering a pdf from rmarkdown require closing rstudio between renders?

Background I am trying to make a rmarkdown document that is rendered using render(). The render call has ... to closed in between renderings? See Question&Answers more detail:os...

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

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364 views

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r - Keeping zero count combinations when aggregating with data.table

Suppose I've got the following data.table : dt <- data.table(id = c(rep(1, 5), rep(2, 4)), sex = c(rep("H" ... F 2 6: orange F 0 Thanks a lot ! See Question&Answers more detail:os...

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

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439 views

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r - Fast linear regression by group

I have 500K users and I need to compute a linear regression (with intercept) for each of them. Each user ... do a linear regression by group? See Question&Answers more detail:os...

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

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311 views

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r - get filename and path of `source`d file

How can a sourced or Sweaved file find out its own path? Background: I work a lot with .R scripts ... Keyboard shortcut of the unthinking user. See Question&Answers more detail:os...

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

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260 views

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r - Shiny saving URL state subpages and tabs

I would like to have a shiny website that keeps the dynamic choices in the URL as output, so you can copy ... get it to work. See screenshot. See Question&Answers more detail:os...

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

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469 views

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r - read.csv is extremely slow in reading csv files with large numbers of columns

I have a .csv file: example.csv with 8000 columns x 40000 rows. The csv file have a string header for each ... or data.frame? Thanks in advance. See Question&Answers more detail:os...

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

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434 views

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r - How to set seed for random simulations with foreach and doMC packages?

I need to do some simulations and for debugging purposes I want to use set.seed to get the same result. Here is the ... with R 2.13 and R 2.14 See Question&Answers more detail:os...

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

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489 views

1 answer

r - Rank variable by group (dplyr)

I have a dataframe with columns x1, x2, group and I would like to generate a new dataframe with an extra column rank ... .5 5.0 2.0 virginica 3 See Question&Answers more detail:os...

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

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364 views

1 answer

r - How to refer to a variable name with spaces?

In ggplot2, how do I refer to a variable name with spaces? Why do qplot() and ggplot() break when used on ... ]) Which would work. 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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333 views

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r - Calling a function from a namespace

I'm trying to alter the functionality of a few commands in a package in R. It's easy enough to see ... exported object from 'namespace:copula' See Question&Answers more detail:os...

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

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396 views

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r - Find the maximum and minimum value of every column and then find the maximum and minimum value of every row

I've got this matrix: a <- matrix(rnorm(1000 * 18, mean = 100, sd = sqrt(10)), 1000, 18) I ... the maximum and minimum value of every row. See Question&Answers more detail:os...

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

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553 views

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r - Using different font styles in annotate (ggplot2)

I'm using the code below to generate a simple chart with some annotations: require(ggplot2); data(mtcars) ggplot( ... the font face and style. See Question&Answers more detail:os...

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

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652 views

1 answer

r - Adjusting width of tables made with kable() in RMarkdown documents

Is it possible to adjust the width of columns when making tables with the kable() function in knitr? A ... columns adjacent to each 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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357 views

1 answer

r - insert side by side png images using knitr

How can I insert side by side png files from my computer into rstudio when creating an html document? The following ... ) grid.raster(img2) ``` See Question&Answers more detail:os...

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

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677 views

1 answer

r - changing title in multiplot ggplot2 using grid.arrange

I have managed to make a 2x2 plot using grid.arrange: library(gridExtra) grid.arrange(p1,p3,p2,p4, ncol=2, ... the title text size and font. See Question&Answers more detail:os...

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

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