In the naive approach, you simply have two nested loops in that makes sure that each elements visits every other list element. Also if the largest value of a certain index is repeated in different groups, then program must allocate that index to the group having largest value of the two. you should be comparing large to largest instead of large+1.
python - How to find multiple max value items in a list - Stack Overflow First find largest number in the list and stored the value in to max, Next loop the same list check the value are not equal to max and find largest number so you get second largest number, New! @justhalf I think nobody understands my question. but as i mentioned before i need use approach by dividing list into parts etc. Can YouTube (e.g.) Can Henzie blitz cards exiled with Atsushi? My approach is to divide a list into two parts and then find the largest number into two parts and then compare two numbers. Using list-comprehension and enumerate, the above can be shortened to: A "fully manual" approach, using none of those pesky standard library functions: What it loses in brevity, it gains in not much. Time Complexity: O(nlogn)Auxiliary Space: O(1), Method 3: By removing the max element from the list, Time Complexity: O(n)Auxiliary Space: O(1), Method 4: Find the max list element on inputs provided by the user. Basically you divide the array into two parts, then return the two largest numbers from the two parts. Relative pronoun -- Which word is the antecedent? If I would only focus on the max. How do you understand the kWh that the power company charges you for? How do I split a list into equally-sized chunks? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To learn more, see our tips on writing great answers. How can I identify and sort groups of text lines separated by a blank line? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. After I stop NetworkManager and restart it, I still don't connect to wi-fi? First I set m to be the first two elements of alist. . rev2023.7.27.43548. The dictionary count is along the lines of {'a': 100, 'b': 210}, and so on. Privacy Policy.
larger is a second largest in part lol I wanted just divide a list into two parts, find largest and larger in each part(overall 4 numbers from two parts) and then find the second largest from 4 numbers)))). Thanks! Learn more about Stack Overflow the company, and our products. How to help my stubborn colleague learn new ways of coding? However, it'd be fine to calculate it outside like: Hey, so I've tried this option myself. :P. While the O(n lg n) bound on time complexity is correct, the space complexity is at worst O(n), and for many algorithms is O(1). How do I make a flat list out of a list of lists? To learn more, see our tips on writing great answers. You mind though explaining how it works? Making statements based on opinion; back them up with references or personal experience. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Global control of locally approximating polynomial in Stone-Weierstrass?
I want to find the largest values from all the columns for repetitive row elements (i.e. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. largest, larger = num, largest is a shortcut for. OverflowAI: Where Community & AI Come Together, How to find second largest number in a list? If I would only focus on the max. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, How to print all the highest value places. Make your rules clearer: Warning: With the list comprehension max is run for every iteration of the loop which is inefficient. is there a limit of speed cops can go on a high speed pursuit? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. Were all of the "good" terminators played by Arnold Schwarzenegger completely separate machines. Thanks for contributing an answer to Stack Overflow! rev2023.7.27.43548.
Python's list Data Type: A Deep Dive With Examples Compare the two sections, take the half with the largest numbers, repeat #2, 4.) Thanks for contributing an answer to Stack Overflow! As I said in another comment, in your first implementation if the list is, @ChatterOne The one where all I done was split up OPs code? Thanks. Example 1: Given input array is {12, 35, 1, 10, 34, 1} Output: The second largest element in array is 34. The first item of colors is at index -7. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. send a video file once and multiple users stream it? [120, 120, 100]. You can try to understand the code and change it to take the two largest. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Given a list of numbers, the task is to write a Python program to find the second largest number in the given list. Global control of locally approximating polynomial in Stone-Weierstrass?
Python program to find N largest elements from a list Why is {ni} used instead of {wo} in ~{ni}[]{ataru}? Then, we can remove the root element (which is the largest element in the heap) and find the new root element, which will be the second largest element in the heap. To learn more, see our tips on writing great answers. REMEMBER, I am not interested in the value, but in their position! Making statements based on opinion; back them up with references or personal experience. Maybe you can get an idea from this, Can you give more explanation? Global control of locally approximating polynomial in Stone-Weierstrass? Can YouTube (e.g.) How to help my stubborn colleague learn new ways of coding? Method 5: Traverse once to find the largest and then once again to find the second largest. This won't work for lists where the max is included twice. You will be notified via email once the article is available for improvement. Thank you for your valuable feedback! I have a tester that runs through cases of my function. funny_list for me is a bunch of cases with a heavily nested list. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. If repeated usage of these functions is required, consider turning the iterable into an actual heap. Single Predicate Check Constraint Gives Constant Scan but Two Predicate Constraint does not. this must be done using loop statements in python 3.2.3 New! 1. count.values() returns list of values, e.g. Thanks for contributing an answer to Code Review Stack Exchange! [0, 1, 2, 2]. Asking for help, clarification, or responding to other answers. is there a limit of speed cops can go on a high speed pursuit? If I had {'a': 120, 'b': 120, 'c': 100}, this would only find the first of a and b, not both. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. The group of row indexes will keep on repeating for 'n'number of times. You can also print the values inside the function instead of returning those, if printing is the only objective. send a video file once and multiple users stream it? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Check PEP8. Getting key with maximum value in dictionary? (Python), Pythonic way to get the largest item in a list. OverflowAI: Where Community & AI Come Together, How to find 2 largest values from group of rows in multiple columns in Python and also show its row and column index without duplicates, Behind the scenes with the folks building OverflowAI (Ep. However it can further be simplified by making it a generator function. basically largest max in one part. The operations performed in each iteration have a constant time complexity, so the overall complexity is O(n). of course you're not going to see the O(n log(n)) behaviour of sort with just 5 items. Why is an arrow pointing through a glass of water only flipped vertically but not horizontally? So, inside the function args is received as a tuple. Can you have ChatGPT 4 "explain" how it generated an answer? How to find the kth largest element in an unsorted array of length n in O(n)? Connect and share knowledge within a single location that is structured and easy to search. As you said in a comment above, it seems that you are only allowed to use for loops, so we can still make it efficient, by doing the min/max finding ourself in linear time, by iterating only once: This essentially does the same as the answer by mgilson does. The time complexity of the code is O(nlogn), where n is the number of elements in the list. For instance, the max() function is used to find the largest string in the list mylist.The strings are compared alphabetically, and the largest string is determined to . How can I know what's the largest number from a while loop in python? Basically you divide the array into two parts, then return the two largest numbers from the two parts. To learn more, see our tips on writing great answers. You have presented an alternative solution, but haven't reviewed the code.
Python's min () and max (): Find Smallest and Largest Values Could this same code be applied if instead 'a','b' and 'c' were columns of a data frame? Can I use the door leading from Vatican museum to St. Peter's Basilica? Then your code will work. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How can I change elements in a matrix to a combination of other elements? What is the difference between Python's list methods append and extend? I need to find the maximum difference in a list between any two elements.
Python | Indices of N largest elements in list - GeeksforGeeks In this, the sorted (), can be used to get the container in a way that requires getting N largest elements at the rear end, and then the indices can be computed using list slicing. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, How do I find the location of the second largest number in a list? Were all of the "good" terminators played by Arnold Schwarzenegger completely separate machines? The best answers are voted up and rise to the top, Not the answer you're looking for? Basically, things like append, max, etc. You can rewrite the same code as follows. Can a judge or prosecutor be compelled to testify in a criminal trial in which they officiated? Basically, things like append, max, etc. Then you can take the last 2 elements. N Channel MOSFET reverse voltage protection proposal. The following code should do. "Sibi quisque nunc nominet eos quibus scit et vinum male credi et sermonem bene". Why would a highly advanced society still engage in extensive agriculture? I seek a SF short story where the husband created a time machine which could only go back to one place & time but the wife was delighted, How to draw a specific color with gpu shader. Why do we allow discontinuous conduction mode (DCM)? rev2023.7.27.43548. Thank you! Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, Thanks. I think you should check your inputs. @ManuLakaster Read the code carefully, what lines are confusing you? This program needs to output the location of these two elements (0 and 4) and their values (1 and 5). It has to be really basic methods for lists. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Pythonic way to get the largest item in a list, Finding the largest number in a list of numbers passed throught the command line in Python, Python How to find the max element in a list, Finding maximum element in a list programmatically in python. Is it normal for relative humidity to increase when the attic fan turns on? I am trying to find the N biggest values from a list, and then print out their positions in the list. [('a', 120), ('b', 120), ('c', 100)]. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA.
Python program to find second largest number in a list do you want someone to do your homework? Making statements based on opinion; back them up with references or personal experience. (Irrespective of + or - sign). send a video file once and multiple users stream it? Also your answer is just perfect for the question and should be accepted as the answer. Other than that, there's the problem of what happens if you have an input like. Plumbing inspection passed but pressure drops to zero overnight, Using a comma instead of and when you have a subject with two verbs, "Pure Copyleft" Software Licenses? By using our site, you Connect and share knowledge within a single location that is structured and easy to search. This can get you: Going forward, you can make an 'n' largest function. The following code should do. Then you compare the four numbers from the two parts, take the largest two, return. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA.
args is a tuple and, therefore, is immutable and cannot be modified. How to find all positions of the maximum value in a list? You can try to understand the code and change it to take the two largest. How to return the key corresponding to the maximum value in dictionary? Given a list of numbers, the task is to write a Python program to find the second largest number in the given list. Connect and share knowledge within a single location that is structured and easy to search. Are arguments that Reason is circular themselves circular and/or self refuting? Python Program to Find Largest Number in a List S Shivam_k Read Discuss Courses Practice Video Given a list of numbers, the task is to write a Python program to find the largest number in given list. I will choose the smaller number from two of them. . When either half contains only two numbers, take the first number from that list, The challenge is you will have to decide what to do if the list cannot be evenly split. That should be 'numlist' instead of 'maxlist' in line 2 and 3.Again in line 4 and 5 instead of just 'list'. Connect and share knowledge within a single location that is structured and easy to search. The space complexity is O(1) as the code only uses a constant amount of extra space. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Use heapq.nlargest with key = fr.__getitem__: it's always easy to convert the list to numpy array and deal with it. Algebraically why must a single square root be done on all terms rather than individually? How to find rows with greatest column value, for each index? OverflowAI: Where Community & AI Come Together, Taking a list of numbers and finding the two largest, Code tells you how, Comments tell you why, Behind the scenes with the folks building OverflowAI (Ep. @arshajii -- I've posted an O(n) solution, so did Alex Thornton (although without the indices), @DavidEhrmann it's a list of 5 small numbers, the language is Python. So I need to be able to do this without using enumeration, lambda, numpy, or anything of that sort. New! Finding the largest number in a list of numbers passed throught the command line in Python. :) @justhalf, yeah thank u:) helped me a lot. New! Python: Counting maximum occurences of an item in a list with ties allowed, Using Python's max to return two equally large values across columns of a data frame, Need improvement in the while loop in python program, second maximum value in dictionary python, python: max value in a dictionary with 2 keys, Return the maximum value in dictionary with multiple keys, Max key from other dictionary values function in Python. Connect and share knowledge within a single location that is structured and easy to search. Please explain your reasoning (how your solution works and how it improves upon the original) so that the author can learn from your thought process. How do I split a list into equally-sized chunks? The group of row indexes will keep on repeating for 'n'number of times. How can I change elements in a matrix to a combination of other elements? @samrap: The requirement is to use "divide-and-conquer", not to use sort. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, Sorry I forgot to mention I must use either for loops to accomplish this. Can a lightweight cyclist climb better than the heavier one by producing less power? Can yo explain please what are you doing here? 120. For float values you should import from decimal import Decimal.Then your code works properly.
Because -8 < -7, Python replaces your start value with 0, which results in a slice that contains the items from 0 to the end of the list. Also, use index() to get the position of an element: Just subtract the maximum value from the minimum value. The auxiliary space of the code is O(n), where n is the number of elements in the list. @ManuLakaster But why would you want to do that? This article is being improved by another user right now. rev2023.7.27.43548. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You should change your function to take a list and return the two largest of it. Idea is to find max value and get all keys corresponding to that value: Same idea as Asterisk, but without iterating over the list twice. To learn more, see our tips on writing great answers. How can I randomly select an item from a list? I can only figure out how to find the max difference between consecutive values, but this creates a problem if the maximum starts elsewhere, e.g. What Is Behind The Puzzling Timing of the U.S. House Vacancy Election In Utah? Step 4- Declare a list and take input or initialise values. How to help my stubborn colleague learn new ways of coding? e.g. I am doing it through simple loops. How do I make a flat list out of a list of lists? args = list (args) if args: max1 = max (args) args.remove (max1) print (max1) if args: max2 = max (args) args.remove (max2) print (max2) args = tuple (args) # if a tuple is required. Sorting the List The other option that immediately popped into my mind was to sort the list. You should set largest equal to the first element in the list like I did in my answer.
As an intermediate result you have a map of (value -> [keys]) for all values. In list [1,2,3,4,5] the maximum difference is 4 (between elements 1 and 5) using for loops. Basically, this is my code. The original list is printed using the print() function and the list variable.
How to find the positions of the N biggest values of a list in python Has these Umbrian words been really found written in Umbrian epichoric alphabet? Fox example: I can't resist one-liners for these kinds of questions. Write a Python Program to find the Largest Number in a List with a practical example. Given below is an O (n) algorithm to do the same. (Irrespective of + or - sign). Not the answer you're looking for? Which was also your question; if there is a problem with the answers there, please comment rather than opening a new question. How to remove an element from a list by index. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. . In list [1,2,3,4,5] the maximum difference is 4 (between elements 1 and 5) using for loops. For What Kinds Of Problems is Quantile Regression Useful? Making statements based on opinion; back them up with references or personal experience. Here is my program, irrespective of complexity, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA.
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