Recent questions tagged R

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r - How to use `assign()` or `get()` on specific named column of a dataframe?

Is there a way to assign a value to a specific column within a data frame? e.g., dat2 = data.frame(c1 = 101:149 ... assign(get(j)[,"VAR1"],1:50) See Question&Answers more detail:os...

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

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519 views

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r - Calculate summary statistics (e.g. mean) on all numeric columns using data.table

I have data with both numeric and non-numeric columns like this: mydt vnum1 vint1 vfac1 vch1 1: -0.30159484 8 3 E 2: ... # 4: 0.03904374 5 # ... See Question&Answers more detail:os...

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

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400 views

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r - ggplot2: plotting order of factors within a geom

I have a (dense) dataset that consist of 5 groups, so my data.frame looks something like x,y,group. I can ... what the order of dots should be? See Question&Answers more detail:os...

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

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317 views

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r - Pass subset argument through a function to subset

I would like to have a function which calls subset, and passes on a subset argument: df <- data.frame(abc=c("A ... . How can I get this working? See Question&Answers more detail:os...

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

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517 views

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r - How can I plot igraph community with defined colors?

I can use the code below to generate and draw communities: wc <- walktrap.community(subgraph) modularity(wc) ... text in the community area? 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 - Alignment of numbers on the individual bars with ggplot2

I want to show numbers on the individuals bars in the following graph. df <- structure(list(A = structure ... will be highly appreciates. 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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r - Error in mlogit: Error in solve.default(H, g[!fixed]) : system is computationally singular: reciprocal condition number = 3.4767e-18

I have a conjoint survey data in long format. the first few rows look like this: ID alt choice size tar ... 18 Can somebody please help me? See Question&Answers more detail:os...

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

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423 views

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r - Rename Columns of Data.frame in list

I am trying to use lapply (and want the solution with lapply) to rename columns of a data.frame located in a list, but ... $u_n u_n 1 1 2 2 3 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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1.2k views

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r - Apply multiple functions to column using tapply

Could someone please point to how we can apply multiple functions to the same column using tapply (or any ... juxtaposed Thanks in advance, Raj See Question&Answers more detail:os...

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

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461 views

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r - plotly: Updating data with dropdown selection

I am not sure if this is possible, but here is what I would like to do. I would like to update ... the visible property by dropdown selections. See Question&Answers more detail:os...

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

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249 views

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r - How to reshape a dataframe with "reoccurring" columns?

I am new to data analysis with R. I recently got a pre-formatted environmental observation-model dataset, an ... ? Many 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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253 views

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r - Count common sets of items between different customers

I have data on customers and the different products they have purchased: Customer Product 1 A 1 B 1 C 2 D ... also for more products than two. See Question&Answers more detail:os...

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

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565 views

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r - Finding the column number and value the of second highest value in a row

I am trying to write some code which identifies the greatest two values for each row and provides their ... these are essential requirements. See Question&Answers more detail:os...

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

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655 views

1 answer

r - shiny dashboard mainpanel height issue

This is an extension of my previous question. Now I am not able to extend the height of my main panel. This is ... )}) } shinyApp(ui, server) 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

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r - Plotly charts in a for loop

I am converting ggplot2 charts using plotly and putting them in a knitr html output. Here is a working copy ... any help. Thanks, Kaustubh See Question&Answers more detail:os...

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

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431 views

1 answer

r - linear model with `lm`: how to get prediction variance of sum of predicted values

I'm summing the predicted values from a linear model with multiple predictors, as in the example below, and want ... a reference for the method. See Question&Answers more detail:os...

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

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1.2k views

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r - How can I apply a gradient fill to a geom_rect object in ggplot2?

I'm in the midst of building a time series line chart using ggplot2 that utilises geom_rect objects to highlight ... be downloaded from here. See Question&Answers more detail:os...

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

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425 views

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r - Subtract pairs of columns based on matching column

I'll apologise in advance - I know this has likely been answered elsewhere, but I don't seem to be ... similar problems in the future? 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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278 views

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r - How do I access the name of the variable assigned to the result of a function within the function?

For example, suppose I would like to be able to define a function that returned the name of the assignment ... call of the function 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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366 views

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r - Convert column in data.frame to date

My dataframe a1 <- c("a","a","b","b","c","d","e","e") b2 <- c("01.01.2015", "02.02. ... format. But I wonder why my approach is not working. See Question&Answers more detail:os...

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

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391 views

1 answer

r - How to add gaussian curve to histogram created with qplot?

I have question probably similar to Fitting a density curve to a histogram in R. Using qplot I have created 7 ... command to do it correctly? See Question&Answers more detail:os...

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

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433 views

1 answer

r - ggplot2: Using gtable to move strip labels to top of panel for facet_grid

I am creating a graphic using facet_grid to facet a categorical variable on the y-axis. I decided not to ... approach! Thanks for reading, Tom See Question&Answers more detail:os...

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

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463 views

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r - Find elements not in smaller character vector list but in big list

I have the two big and small list. I want to know which of the elements in big list are not in smaller list. The ... output is new <- c("D") See Question&Answers more detail:os...

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

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274 views

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r - How is data passed from reactive Shiny expression to ggvis plot?

I am getting acquainted with ggvis and I am trying to use it in shiny. I am having trouble understanding how ggvis gets the ... .10.0 on R 3.1.1 See Question&Answers more detail:os...

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

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419 views

1 answer

r - How to find the percentage of NAs in a data.frame?

I am trying to find the percentage of NAs in columns as well as inside the whole dataframe: The first method ... num) * 100 print(NApercentage) See Question&Answers more detail:os...

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

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1.0k views

1 answer

r - Changing the font size of figure captions in RMarkdown HTML output

I would like to make the font size of all figure captions in my R Markdown document smaller. The final output ... How can I solve this problem? See Question&Answers more detail:os...

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

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383 views

1 answer

r - group_by() into fill() not working as expected

I'm trying to do a Last Observation Carried Forward operation on some poorly formatted data using dplyr and tidyr. ... mark it as the solution. See Question&Answers more detail:os...

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

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607 views

1 answer

r - navlistPanel: Make tabs sequentially active in shiny app

I am trying to write a shiny app in which the tabs are active sequentially. For example, the user ... reading suggestion is much 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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