Recent questions tagged lapply

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lapply - How do you read multiple .txt files into R?

This question already has answers here: Question&Answers:os...

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

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800 views

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lapply vs for loop - Performance R

It is often said that one should prefer lapply over for loops. There are some exception as for example ... the time is spent in subsetting Function profiling Question&Answers:os...

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

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972 views

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lapply - Read multiple files but keep track of which file is which dataframe in R

Let's say I have these files: N1.xlsx N2.xlsx N3.xlsx N4.xlsx I want them in a list, but each dataframe must ... multiple-files-but-keep-track-of-which-file-is-which-dataframe-in-r...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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lapply - How to change column names of many dataframes in R?

I would like to make the same changes to the column names of many dataframes. Here's an example: ChangeNames <- ... /65649658/how-to-change-column-names-of-many-dataframes-in-r...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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lapply - How to apply log function to dataframe in R?

I have a dataframe named COMP with 24 columns in it. I would like to create another dataframe named COMPLog with ... questions/66058263/how-to-apply-log-function-to-dataframe-in-r...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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921 views

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lapply - How to apply log function to dataframe in R?

I have a dataframe named COMP with 24 columns in it. I would like to create another dataframe named COMPLog with ... questions/66058263/how-to-apply-log-function-to-dataframe-in-r...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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988 views

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lapply - How can I change all the names in a list to one in R?

How can I change all names like: Finland:Aland Islands:Foglo into only: Finland? I tried using lapply(gsub , pattern = ... Oleron 48 France 49 UK:Isle of Wight 50 UK:Wales:Anglesey...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.5k views

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lapply - R funtion to merge rows by id and create separate columns

I have a list of articles obtained from an API, with my dataframe looking like this: PMID Year Title Journal Author ... provided works if you use dcast as data.table::dcast!...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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