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Rstats 101

Learn R Programming Tips & Tricks for Statistics and Data Science

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dplyr

dplyr rows_update(): Modify existing rows

rstats101 · September 20, 2024 ·

In this post, we will learn how to use dplyr's rows_update() function with examples. dplyr's rows_update() function is a useful function to modify or update specific rows in a data frame based on a matching values in key column. It takes in two dataframes x and y, updates … [Read more...] about dplyr rows_update(): Modify existing rows

Filed Under: dplyr rows_update(), rstats101 Tagged With: update rows with rows_update()

dplyr n_distinct(): count unique elements or rows

rstats101 · September 14, 2024 ·

In this post, we will learn how to use dplyr's n_distinct() function to count the number of unique or distinct values in one or more vectors or columns of a dataframe. dplyr's n_distinct() is very useful when you are working with a dataframe and need to know how many unique … [Read more...] about dplyr n_distinct(): count unique elements or rows

Filed Under: dplyr n_distinct(), rstats101 Tagged With: n_distinct() to count unique elements

How to select top and bottom rows by a column simultaneously

rstats101 · September 2, 2024 ·

In this tutorial, we will learn how to select top and bottom rows of a dataframe based on the values of a column with tidyverse in R. Here we will see a specific approach to get top and bottom rows when the values of the column of interest has both positive and negative values. … [Read more...] about How to select top and bottom rows by a column simultaneously

Filed Under: dplyr slice_max(), rank(), rstats101 Tagged With: select top and bottom rows

How to convert a list to a dataframe

rstats101 · August 23, 2024 ·

In this tutorial, we will learn 3 different ways to convert a list object into a dataframe in R. First we will show how to use the base R function as.data.frame() to convert a list to a dataframe. Then we will show examples using map_df() function in purrr package in tidyverse … [Read more...] about How to convert a list to a dataframe

Filed Under: as.data.frame, dplyr bind_rows(), map_df, rstats101 Tagged With: convert list to dataframe

dplyr’s anti_join() to find rows based on presence or absence in a dataframe

rstats101 · July 5, 2024 ·

In this tutorial, we will learn how to use dplyr's anti_join() function to filter rows from one dataframe based on the presence or absence of matches in another dataframe. dplyr's anti_join() function is extremely useful for cases when we want to find what row is present or … [Read more...] about dplyr’s anti_join() to find rows based on presence or absence in a dataframe

Filed Under: dplyr anti_join(), rstats101 Tagged With: dplyr anti_join() to find unmatched rows

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%in% arrange() as.data.frame as_tibble built-in data R colSums() R cor() in R data.frame dplyr dplyr across() dplyr group_by() dplyr rename() dplyr rowwise() dplyr row_number() dplyr select() dplyr slice_max() dplyr slice_sample() drop_na R duplicated() gsub head() impute with mean values is.element() linear regression matrix() function na.omit R NAs in R near() R openxlsx pivot_longer() prod() R.version replace NA replace NAs tidyverse R Function rstats rstats101 R version scale() sessionInfo() t.test() tidyr tidyselect tidyverse write.xlsx

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