Recent questions tagged R-faq

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Q: Is there an R function for finding the index of an element in a vector?

Is there any shortcut method to find an index of an element in a vector, I have an element Q with me ... someone answer this doubt? Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Expert R users, what's in your .Rprofile?

What does startup profiles of R professionals include, I have no customization in R and I want to add some. ... highlight my syntax. Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Global variables in R

I want to set some global variables inside a function, how can I do that? Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Subscript out of bounds - general definition and solution?

There is an error of subscript out of bounds: # Load necessary libraries and data library(igraph) library(NetData) ... > 0)) # Calculate reachability for each vertix reachability...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Error in file(file, “rt”) : cannot open the connection

I am facing an error after performing this syntax: This is the error: Error in file(file, "rt") : cannot ... No such file or directory Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Remove duplicated rows

How can I remove rows which are duplicate in a column. I have read csv file into R data.frame. For ex. ... same data in first column. Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Combine two data frames by rows (rbind) when they have different sets of columns

I want to bind two data frames with different set of columns and I also want to retain all the columns that fails to ... do that in R? Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Counting unique / distinct values by group in a data frame

I have a dataframe: > myvec name order_no 1 Nehal 12 2 sejal 14 3 sejal 16 4 shyam 11 5 Nehal 12 6 Sejal 16 ... Sejal 3 Shyam 1 Ram 1 Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Drop data frame columns by name

I want to remove some questions from data frame, I know how to delete them individually using df$x...

asked Jan 23, 2022 in Education by JackTerrance

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Q: R - list to data frame

Can someone please tell me a quick way to convert a nested list of data whose length is 100 and each item is a list of ... 100 rows and 10 columns? I am attaching a sample data: 5...

asked Jan 20, 2022 in Education by JackTerrance