Time Complexity of dplyr functions

  • Thread starter Thread starter Trollfaz
  • Start date Start date
AI Thread Summary
The time complexity of basic dplyr functions like filter(), select(), mutate(), rename(), summarize(), count(), separate(), unite(), spread(), and gather() is generally considered O(N), where N is the number of rows in the data frame. Assuming mutate operates in O(1), this holds true for single data frames. For operations involving two data frames, such as inner_join, left_join, and outer_join, the time complexity is O(N + M), where N and M are the row counts of the respective data frames. This reflects the need to process both data frames during the join operations. Understanding these complexities is crucial for optimizing data manipulation tasks in R using dplyr.
Trollfaz
Messages
143
Reaction score
14
TL;DR Summary
R
For R's dplyr package this is my query.
Suppose I have a data frame/tibble of n observations or n rows. Let's call it df1. Is the time complexity for dplyr's basic manipulation functions O(N)
filter()
select()
mutate() assuming mutate is O(1)
rename()
summarize()
count()
separate()
unite()
spread()
gather()
If I have another data frame/tibble df2 of m rows, then are the following functions of time complexity O(N+M)
inner_join(df1,df2)
right/left_join(df1,df2)
outer_join(df1,df2)
 
Thread 'Star maps using Blender'

Thread 'Star maps using Blender'

Blender just recently dropped a new version, 4.5(with 5.0 on the horizon), and within it was a new feature for which I immediately thought of a use for. The new feature was a .csv importer for Geometry nodes. Geometry nodes are a method of modelling that uses a node tree to create 3D models which offers more flexibility than straight modeling does. The .csv importer node allows you to bring in a .csv file and use the data in it to control aspects of your model. So for example, if you...
View full post »

Thread 'Who is responsible for the software when AI takes over programming?'

I tried a web search "the loss of programming ", and found an article saying that all aspects of writing, developing, and testing software programs will one day all be handled through artificial intelligence. One must wonder then, who is responsible. WHO is responsible for any problems, bugs, deficiencies, or whatever malfunctions which the programs make their users endure? Things may work wrong however the "wrong" happens. AI needs to fix the problems for the users. Any way to...
View full post »

Similar threads

MHB How to Sort Elements of a Matrix in O(n) Time Complexity?
Replies
1
Views
2K
Complexity of this heap algorithm
Replies
1
Views
2K
MHB What is the Time Complexity of These Binary Search Tree Functions?
Replies
3
Views
2K
Animation using matplotlib query
Replies
1
Views
2K
Evaluate the complexity of this graph coloring algorithm
Replies
1
Views
2K
MHB Algorithm with time complexity o(n^2)
Replies
4
Views
2K
MHB Is $\Theta(m^2)$ the best time complexity we can achieve for this problem?
Replies
25
Views
4K
MHB Execution Time of QuickSort for Different Inputs
Replies
1
Views
1K
Python How to get output from a layer during training in Keras?
Replies
7
Views
7K
'Residence' time distribution function for a Pulse input
Replies
14
Views
4K

Hot Threads

Recent Insights

Back
Top