duplicates

问题 Suppose that there are three variables in my data frame (mydata): 1) id, 2) case, and 3) value. mydata <- data.frame(id=c(1,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4), case=c("a","b","c","c","b","a","b","c","c","a","b","c","c","a","b","c","a"), value=c(1,34,56,23,34,546,34,67,23,65,23,65,23,87,34,321,87)) mydata id case value 1 1 a 1 2 1 b 34 3 1 c 56 4 1 c 23 5 1 b 34 6 2 a 546 7 2 b 34 8 2 c 67 9 2 c 23 10 3 a 65 11 3 b 23 12 3 c 65 13 3 c 23 14 4 a 87 15 4 b 34 16 4 c 321 17 4 a 87 For each id, we

问题 I'm dealing with a large amount (30,000) files of about 10MB in size. Some of them (I estimate 2%) are actually duplicated, and I need to keep only a copy for every duplicated pair (or triplet). Would you suggest me an efficient way to do that? I'm working on unix. 回答1: There is an existing tool for this: fdupes Restoring a solution from an old deleted answer. 回答2: you can try this snippet to get all duplicates first before removing. find /path -type f -print0 | xargs -0 sha512sum | awk '($1

问题 How can I duplicate a "tabPage" inside of my TabControl? I tried this: //My TabControl: tc //My Tab ID: 0 TabPage newPage = new TabPage(); foreach (Control control in tc.TabPages[0].Controls) { newPage.Controls.Add(control); } tc.TabPages.Add(newPage); but it doesn't work. Thanks in advance. 回答1: I got it! For those who has the same kind of problem, Here is what I’ve done: I had created a UserControl (thanks a lot for @SLaks and @Brian for your tip), copied all objects from my TabControl to

问题 In the process of trying to install django, I had a series of failures. I followed many different tutorials online and ended up trying to install it several times. I think I may have installed it twice (which the website said was not a good thing), so how do I tell if I actually have multiple versions installed? I have a Mac running Lion. 回答1: open terminal and type python then type import django then type django and it will tell you the path to the django you are importing. Goto that folder

问题 I have a list lst = [1,1,1,2,2,2,2,3,3,3,3,3,4,4,4,4,4,4,4,4,4] I'm expecting the following output: out = [1,"","",2,"","","",3,"","","","",4,"","","","","","","",""] I want to keep the first occurrence of the item and replace all other occurrences of the same item with empty strings. I tried the following approach. `def splrep(lst): from collections import Counter C = Counter(lst) flst = [ [k,]*v for k,v in C.items()] nl = [] for i in flst: nl1 = [] for j,k in enumerate(i): nl1.append(j) nl

问题 I have a data table with 4 columns: ID, Name, Rate1, Rate2. I want to remove duplicates where ID, Rate1, and Rate 2 are the same, but if they are both NA, I would like to keep both rows. Basically, I want to conditionally remove duplicates, but only if the conditions != NA. For example, I would like this: ID Name Rate1 Rate2 1 Xyz 1 2 1 Abc 1 2 2 Def NA NA 2 Lmn NA NA 3 Hij 3 5 3 Qrs 3 7 to become this: ID Name Rate1 Rate2 1 Xyz 1 2 2 Def NA NA 2 Lmn NA NA 3 Hij 3 5 3 Qrs 3 7 Thanks in

问题 I have a data table with 4 columns: ID, Name, Rate1, Rate2. I want to remove duplicates where ID, Rate1, and Rate 2 are the same, but if they are both NA, I would like to keep both rows. Basically, I want to conditionally remove duplicates, but only if the conditions != NA. For example, I would like this: ID Name Rate1 Rate2 1 Xyz 1 2 1 Abc 1 2 2 Def NA NA 2 Lmn NA NA 3 Hij 3 5 3 Qrs 3 7 to become this: ID Name Rate1 Rate2 1 Xyz 1 2 2 Def NA NA 2 Lmn NA NA 3 Hij 3 5 3 Qrs 3 7 Thanks in

问题 I would like to remove a certain number of duplicates of a list without removing all of them. For example, I have a list [1,2,3,4,4,4,4,4] and I want to remove 3 of the 4's, so that I am left with [1,2,3,4,4] . A naive way to do it would probably be def remove_n_duplicates(remove_from, what, how_many): for j in range(how_many): remove_from.remove(what) Is there a way to do remove the three 4's in one pass through the list, but keep the other two. 回答1: If you just want to remove the first n

问题 I want to remove duplicated values in each coulmn of an uneven data.table. For instance, if the original data is (the real data table has many columns and rows): dt <- data.table(A = c("5p", "3p", "3p", "6y", NA), B = c("1c", "4r", "1c", NA, NA), C = c("4f", "5", "5", "5", "4m")) > dt A B C 1: 5p 1c 4f 2: 3p 4r 5 3: 3p 1c 5 4: 6y <NA> 5 5: <NA> <NA> 4m after removal of duplicated values in each column it should look like this: A B C 5p 1c 4f 3p 4r 5 NA NA NA 6y NA NA NA NA 4m I am trying a

问题 My implementation: extension Array where Element:Equatable { func removeDuplicates() -> [Element] { var result = [Element]() for value in self { if result.contains(value) == false { let r = result.append(value) } } return result } } let arrayOfInts = [1, 2, 2, 3, 3, 3, 1].reverse() for element in arrayOfInts.removeDuplicates(){ print(element) } I would like to perform operations on the array after the adjacent integers have been removed. 回答1: Your extension is defined on array and reversed