When working with file systems, checking the directory or file existence is always better before commencing the operations. For a…
Calculating Standard Deviation (SD) by group in a Data Frame essentially means finding the SD of a specific numeric column…
When we say summarise multiple columns, it means aggregate the input data by applying summary functions (sum, mean, max, etc.)…
Cumulative sum by group means for each group, we calculate the running sum of values in the specific column that…
Finding the minimum value by group means getting the smallest value within each group in our data frame. For example,…
If you want to find the maximum value within a specific subset of your data, you must find the maximum…
Counting conditionally in the data frame means counting the number of rows that meet specific conditions defined by the user.…
What do you mean by counting unique values by group? Well, it means you divide the dataset into subsets based…
To calculate the percentage by the group in R, you need to combine various dplyr functions such as group_by(), summarise(), mutate(),…
In R, you can calculate the sum by group using the base aggregate(), dplyr's group_by() with summarise(), or the data…