duplicates

I have an n-by-m rectangular matrix (n != m). What's the best way to find out if there are any duplicate rows in it in MATLAB? What's the best way to find the indices of the duplicates? Andrew Janke Use unique() to find the distinct row values. If you end up with fewer rows, there are duplicates. It'll also give you indexes of one location of each of the distinct values. All the other row indexes are your duplicates. x = [ 1 1 2 2 3 3 4 4 2 2 3 3 3 3 ]; [u,I,J] = unique(x, 'rows', 'first') hasDuplicates = size(u,1) < size(x,1) ixDupRows = setdiff(1:size(x,1), I) dupRowValues = x(ixDupRows,:)

I have created a Node ( AnchorPane ) in the JavaFX scene builder and was wondering how to clone it. I saw Duplicate/Clone Node in JavaFX 2.0 but I need to clone the Node without re-loading the fxml. Is there any way to achieve this in JavaFX 2? You can place the component that needs to be duplicated in a separate .fxml file. Then you can load the separate file as many times as needed adding the nodes to the appropriate root in the main scene. Additionally you can edit an <fx:include source="..."/> element to the main .fxml file and include the separate .fxml file. You can then still work with

How to do numbering/sequencing for sets of same column values? For example: Col1 Col2 Andy 1 Chad 1 Bill 1 Andy 2 Bill 2 Bill 3 Chad 2 Bill 4 Since Andy got 2 values, I want to number it 1 and 2 in Column 2. For Bill , I want to number it 1, 2, 3 and 4 and so on. You can accomplish this with countif and a sliding range : A B 1 val1 =COUNTIF($A$1:A1, A1) 2 valx =COUNTIF($A$1:A2, A2) and so on. The formula in column B can be dragged down / autofilled in the column. It anchors to the start of the range and only looks as far down as the value we are numbering; COUNTIF is tallying up the matching

I'm working on a large dataset with n covariates. Many of the rows are duplicates. In order to identify the duplicates I need to use a subset of the covariates to create an identification variable. That is, (n-x) covariates are irrelevant. I want to concatenate the values on the x covariates to uniquely identify the observations and eliminate the duplicates. set.seed(1234) UNIT <- c(1,1,1,1,2,2,2,3,3,3,4,4,4,5,6,6,6) DATE <- c("1/1/2010","1/1/2010","1/1/2010","1/2/2012","1/2/2009","1/2/2004","1/2/2005","1/2/2005", "1/1/2011","1/1/2011","1/1/2011","1/1/2009","1/1/2008","1/1/2008","1/1/2012","1

I need to remove duplicate words from a string. How would I go about doing that? If you want to remove the word "duplicates": string duplicatesRemoved = RTBstring.Replace("duplicates", ""); ;) The easy (and overly simplistic) way to remove duplicate words is to split on the space character and use LINQ's Distinct() method: string duplicatesRemoved = string.Join(" ", RTBstring.Split(' ').Distinct()); But this won't work in a useful way if you're working with actual sentences (i.e. punctuation will break it). Without a clear definition of what you mean by duplicates and what the expected input

The question is a little complex. The problem here is to get rid of duplicates and save the unique elements of array into another array with their original sequence. For example : If the input is entered b a c a d t The result should be : b a c d t in the exact state that the input entered. So, for sorting the array then checking couldn't work since I lost the original sequence. I was advised to use array of indices but I don't know how to do. So what is your advise to do that? For those who are willing to answer the question I wanted to add some specific information. char** finduni(char

I know that this question has been asked before, and I've saw some of the answers, but this question is more about my code and the best way of accomplishing this task. I want to scan a directory and see if there are any duplicates (by checking MD5 hashes) in that directory. The following is my code: import sys import os import hashlib fileSliceLimitation = 5000000 #bytes # if the file is big, slice trick to avoid to load the whole file into RAM def getFileHashMD5(filename): retval = 0; filesize = os.path.getsize(filename) if filesize > fileSliceLimitation: with open(filename, 'rb') as fh: m =

I'd like to delete duplicates in a JSONiq array. let $x := [1, 2, 4 ,3, 3, 3, 1, 2, 5] How can I eliminate the duplicates in $x? let $x := [1, 2, 4 ,3, 3, 3, 1, 2, 5] return [ distinct-values($x[]) ] Paul Sweatte Use the replace function multiple times: replace($x, "([1-5])(.*)\1", "$1") Here's a fully functional JavaScript equivalent: [1,2,4,3,3,1,2,5].toString().replace(/([1-5]),(\1)/g, "$1").replace(/(,[1-5])(.*)(\1)/g,"$1$2").replace(/([1-5])(.*)(,\1)/g,"$1$2") Here is a generic JavaScript equivalent via the JSON.parse() method, which removes duplicates automatically: var foo = [1,2,4,3,3