In python, I can do something like It gives me [1, 5, 99, 100, -5, -7, -100] It is sorted by positive/negative number and abs value. How can I do the same thing in R? Without splitting into positive and negative numbers? a = c(1,100,5,-5,-7,99,-100) Answer Use the order() function: Created on 2022-03-22 by th…
Tag: sorting
Why is this array changing when I’m not operating on it?
I have two arrays: And I’m running the foll)owing code: I get the following result: Why are the last elements changed? I don’t see why X is changed by indexing some elements. edit: added np.array Answer Output:
Usage of sorted with ord() and lambda in python
I was doing an exercise on Hackerrank, and in the discussion I stumbled upon a very nice one line solution to solve the following question: S is an alphanumeric string, and you have to sort it using the following rules: All sorted lowercase letters are ahead of uppercase letters. All sorted uppercase letters …
How to use key in the sort function in this situation (Python)?
I have a list like this: Now I want to sort it, but by the number, not by the word. If I just use l.sort() it just sorts by alphabetically. My desired output should be sth like (d,0)(c,1)(a,2)(b,4) I tried l.sort(key = l[0][1]) but it won’t work too (l[0][1] actually refer to number 2, which is the seco…
Sort dict by multiple keys and with int and None data in python
so I have a dict : I want to sort my dict on ‘i.chromosome’, ‘i.linkageGroup’ and ‘i.positionCm’ What I am doing : And i got : In python 2, they were doing : Could you help me please, I am lost ! Answer Given and the requirement that Nones are for int, you can solve it usin…
How can I sort a python list by key without .sort()?
I want to convert this piece of code in order to make it compatible with Numba. The only sort method that Numba support is sorted() but not with the key arg. I have to manualy sort without other lib imports or maybe just some numpy. Someone could give me an efficient way to do this sort ? Thanks Edit :
Sorting (or partially sorting) a list of objects based on a specific attribute
Problem I have a list of objects. Each object has two attributes: “score” and “coordinates”. I need to find the largest N objects of the list based on the score attribute. The main problem I’m having is sorting the objects using only the score attribute. Sorting can be partial. I…
How can I efficiently find distances from each value to the next lower/higher value?
I’ll tell you what structures I am using, please feel free to recommend any changes like numpy arrays or something. Anyways what I have is a list of 5 million sequential entries that correspond to a stock price. I then have 2 more lists, each of these is the same length – 5 million entries. These …
Python – Group(Cluster/Sort) arrays based on ranking information
I have a dataframe looks like this: I converted the dataframe into 2D arrays like this: The score of each row 1-5 actually means the people give the scores to item A, B, C, D. I would like to identify the people who have the same ranking, for example the people think A > B > C > D. And
Processing files in sorted order
I have 67 images in a directory with names as: Files are jpg files Im_260x_y where x is the number of images 1..67, y are 0, 1, 4, 8, 16, 32, 64, 128, 258. These files are randomly stored in the directory. I want to process the files in sorted order (same order which I have written above i.e Image