Recent questions tagged R

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r - Harvest (rvest) multiple HTML pages from a list of urls

I have a dataframe that looks like this: country <- c("Canada", "US", "Japan", "China") url ... Aboriginal peoples European colonization ...etc 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 - Change the number of breaks using facet_grid in ggplot2

I have a kind of data such as: y<-rep(c(1, 2, 3), times=5) group<-rep(c("a", "b", "c", "d", ... but the plot it turns so ugly. Can you help me? See Question&Answers more detail:os...

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

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496 views

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r - The variable from a netcdf file comes out flipped

I have downloaded a nc file from f=open.ncdf("file.nc") [1] "file Lfile.nc has 2 dimensions:" [1] " ... correctly plotted as you can see below. 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 - Automated formula construction

In a recent homework assignment, we were instructed to run 27 linear models, each time adding an additional variable ... for a given data frame? 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 - Adding missing rows

The format of my excel data file is: day value 01-01-2000 00:00:00 4 01-01-2000 00:01:00 3 01-01-2000 00:02: ... :03:00 0 01-01-2000 00:04:00 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 - Blend of na.omit and na.pass using aggregate?

I have a data set containing product prototype test data. Not all tests were run on all lots, and not all ... 2) shorter syntax for ddply. 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 - qqline in ggplot2 with facets

This question showed how to make a qqplot with a qqline in ggplot2, but the answer only seems to work when plotting ... () + facet_grid(y ~ z) 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 - Join two data tables and use only one column from second dt

Let's say I have two data tables (dt1 and dt2), and I want to get dt3 using data tables. A,B,C,E,F,G,H are column ... 5 8 17 3 6 9 18 2 20 21 17 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 - Plot dates on the x axis and time on the y axis with ggplot2

I have read in a series of 37 dates and times that an event happened. It is now sitting as a POSIXlt object. I ... = c("POSIXlt", "POSIXt")) See Question&Answers more detail:os...

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

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437 views

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r - How to prep transaction data into basket for arules

Ok, so I have searched a lot and want to run arules on sales data. I just need to properly get the ... step I will understand this further. See Question&Answers more detail:os...

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

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383 views

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r - count unique combinations of values

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 - Split date data (m/d/y) into 3 separate columns

I need to convert date (m/d/y format) into 3 separate columns on which I hope to run an algorithm.(I'm ... appreciated. Thanks in advance... :) See Question&Answers more detail:os...

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

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331 views

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r - Extracting indices for data frame rows that have MAX value for named field

I have a data frame that is rather large and I need a good way (explained bellow) to extract indices for rows ... seems way to wordy too me. See Question&Answers more detail:os...

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

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879 views

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r - Change text color for cells using TableGrob

Is there a way to individually change the color of the text of a cell when using tableGrob and ggplot2? ... y)) + annotation_custom(mytable) See Question&Answers more detail:os...

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

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759 views

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r - Edit datatable in Shiny with dropdown selection for factor variables

I am trying to create a Shiny app that allows users to edit a datatable, whereby the edits are saved. Here is ... prefer to use DT if possible. See Question&Answers more detail:os...

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

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545 views

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r - How can I access dimensions of labels plotted by `geom_text` in `ggplot2`?

As far as I can see ggplot2 knows the dimensions of labels plotted by geom_text. Otherwise the check_overlap ... I access that information? See Question&Answers more detail:os...

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

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530 views

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r - Draw lines between different elements in a stacked bar plot

I'm trying to draw lines between two separate stacked bars (same plot) in ggplot2 to show that two segments of the ... ) Goal for the end plot: See Question&Answers more detail:os...

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

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243 views

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r - Compute projection / hat matrix via QR factorization, SVD (and Cholesky factorization?)

I'm trying to calculate in R a projection matrix P of an arbitrary N x J matrix S: P = S (S'S) ^ - ... I'm looking for a neat general solution. See Question&Answers more detail:os...

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

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273 views

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r - Implementation of skyline query or efficient frontier

I know there must be an easy answer to this but somehow I can't seem to find it... I have a data frame with ... rows 2 and 3. Thanks a lot! See Question&Answers more detail:os...

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

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511 views

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r - linear interpolate missing values in time series

I would like to add all missing dates between min and max date in a data.frame and linear interpolate all missing ... 10 line for loop code.) See Question&Answers more detail:os...

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

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496 views

1 answer

r - How to access browser session/cookies from within Shiny App

How can I access cookies and other browser-related session data from within a Shiny app? With session$clientData, we ... cookies in shiny app? See Question&Answers more detail:os...

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

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351 views

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r - How to iterate over list of Dates without coercion to numeric?

This is related to Looping over a Date or POSIXct object results in a numeric iterator > dates <- as.Date( ... should be coerced to numeric? See Question&Answers more detail:os...

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

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185 views

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r - Multiple functions on multiple columns by group, and create informative column names

How to adjust a data table manipulation so that, besides sum per category of several colums, it would also ... exact answer that I need See Question&Answers more detail:os...

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

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797 views

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r - Combine separate Year and Month columns into single Date Column

I have a data frame (df) like this: code year month 1 YYOOGG 2011 8 2 YYOOGG 2011 1 3 YYOOGG 2011 4 4 ... the following as the date: 2011-09-09 See Question&Answers more detail:os...

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

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654 views

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r - Plotting normal curve over histogram using ggplot2: Code produces straight line at 0

this forum already helped me a lot for producing the code, which I expected to return a histogram of a specific ... lot in advance! Best, Jannik 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

1 answer

r - ggplot2: Have shorter tick marks for tick marks without labels

I have a plot using ggplot2 in which I'd like many ticks along the x-axis, yet only some of the ticks will ... be longer than those that don't. 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

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r - multiple histograms with ggplot2 - position

I am trying to plot side by side the following datasets dataset1=data.frame(obs=runif(20,min=1,max=10)) ... colour="black",fill="orange") See Question&Answers more detail:os...

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

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288 views

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r - data.table: anonymous function in j

I'm trying to have an anonymous function return multiple columns in the j argument of a data.table. Here's an ... of the data.table j 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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