Recent questions tagged R

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r - Mean of a column in a data frame, given the column's name

I'm inside a big function I have to write. In the last part I have to calculate the mean of a column ... given as an argument to the function. See Question&Answers more detail:os...

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

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417 views

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r - Is there a way of manipulating ggplot scale breaks and labels?

ggplot generally does a good job of creating sensible breaks and labels in scales. However, I find that in ... default calculated scale limits. See Question&Answers more detail:os...

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

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413 views

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r - Why is enquo + !! preferable to substitute + eval

In the following example, why should we favour using f1 over f2? Is it more efficient in some sense? For ... , clarity, compositionality,...)? 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 - Write list of data.frames to separate CSV files with lapply

The question says it all - I want to take a list object full of data.frames and write each data.frame to a ... be used What am I missing 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 - How to remove rows with any zero value

I have a problem to solve how to remove rows with a Zero value in R. In others hand, I can use na.omit() to delete ... | 24 | 24 | 24 | 24 | See Question&Answers more detail:os...

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

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254 views

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r - Speeding up the performance of write.table

I have a data.frame and I want to write it out. The dimensions of my data.frame are 256 rows by 65536 ... are faster alternatives to write.csv? 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 - Why is plyr so slow?

I think I am using plyr incorrectly. Could someone please tell me if this is 'efficient' plyr code? require(plyr ... lattice_0.20-6 tools_2.15.1 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 markdown - pandoc version 1.12.3 or higher is required and was not found (R shiny)

I have a problem generating a pdf report from my app shiny which is hosted on a server. the app works ... to give other information if needed. See Question&Answers more detail:os...

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

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428 views

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r - Align plot areas in ggplot

I am trying to use grid.arrange to display multiple graphs on the same page generated by ggplot. The plots ... actual plot windows the same? See Question&Answers more detail:os...

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

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344 views

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r - multiple graphs in one canvas using ggplot2

I am trying to merge two ggplot2 plots into one based on this table: Type RatingA RatingB 1 One 3 36 2 Two ... something that would do the job. See Question&Answers more detail:os...

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

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356 views

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r - using substitute to get argument name with

I'm trying to get the names of arguments in the global environment within a function. I know I can use substitute to get ... ]] [[2]] X[[2L]] See Question&Answers more detail:os...

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

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554 views

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r - Installing of SparkR

I have the last version of R - 3.2.1. Now I want to install SparkR on R. After I execute: > install. ... 4.0 How I can solve this problem? 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 - Combine column to remove NA's

I have some columns in R and for each row there will only ever be a value in one of them, the rest ... . Any help would be 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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490 views

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r - Removing display of row names from data frame

I am creating a dataframe using this code: df <- data.frame(dbGetQuery(con, paste('select * from test'))) Which ... to be present in the table. See Question&Answers more detail:os...

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

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372 views

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r - Legend placement, ggplot, relative to plotting region

Problem here is a bit obvious I think. I'd like the legend placed (locked) in the top left hand corner ... placement makes me sad") 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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544 views

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r - duplicate 'row.names' are not allowed error

I am trying to load a csv file that has 14 columns like this: StartDate, var1, var2, var3, ..., var14 when ... is a (comma separated) csv file. See Question&Answers more detail:os...

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

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333 views

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r - Using dynamic column names in `data.table`

I want to calculate mean of each of several columns in a data.table, grouped by another column. My question is similar ... 109.5 1009.5 10009.5 See Question&Answers more detail:os...

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

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270 views

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r - Referring to data.table columns by names saved in variables

data.table is a fantastic R package and I am using it in a library I am developing. So far all is going very ... valcol, but not dist and val? See Question&Answers more detail:os...

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

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270 views

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r - Create a PDF table

Is there a way to produce a PDF of a table from R in the same way you produce a plot (ie with pdf() or ... would like to produce it just from 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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587 views

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r - heatmap with values (ggplot2)

I've seen heatmaps with values made in various R graphics systems including lattice and base like this: I tend to ... the text on the heatmap? See Question&Answers more detail:os...

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

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504 views

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r - knitr/rmarkdown/Latex: How to cross-reference figures and tables?

I'm trying to cross-reference figures and tables in a PDF produced with knitr/rmarkdown. There are some ... ]{capposition=top} PDF output See Question&Answers more detail:os...

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

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828 views

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r - Converting a data frame to xts

I'm trying to convert a data frame to xts object using the as.xts()-method. Here is my input dataframe q: ... work... Any help is 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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322 views

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r - Loading many files at once?

So let's say I have a directory with a bunch of .rdata files file_names=as.list(dir(pattern="stock_*")) ... work in this context either. Ideas? See Question&Answers more detail:os...

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

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306 views

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r - What do the %op% operators in mean? For example "%in%"?

I tried to do this simple search but couldn't find anything on the percent (%) symbol in R. What does %in% mean in ... ? What does %>% mean 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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652 views

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r - Issue when importing dataset: `Error in scan(...): line 1 did not have 145 elements`

I'm trying to import my dataset in R using read.table(): Dataset.df <- read.table("C:\dataset.txt", header=TRUE ... mean and how can I 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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363 views

1 answer

r - Add a prefix to column names

When reading the following helpfile it should be possible to add a prefix to the column names : colnames(x, do.NULL ... = "Sub_") colnames(m2) See Question&Answers more detail:os...

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

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372 views

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r - Cartesian product data frame

I have three or more independent variables represented as R vectors, like so: A <- c(1,2,3) B <- factor( ... once, that would also be helpful. See Question&Answers more detail:os...

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

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485 views

1 answer

r - auto.arima() equivalent for python

I am trying to predict weekly sales using ARMA ARIMA models. I could not find a function for tuning the order( ... in python for this purpose? See Question&Answers more detail:os...

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

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