I have read a CSV file into an R data.frame. Some of the rows have the same element in one of the columns. I would like to remove rows that are duplicates in that column. For example.

Removing row or column wise duplicates from matrix of characters; Maximum sum path in a Matrix; Construct a Doubly linked linked list from 2D Matrix; Minimum cost to reach from the top-left to the bottom-right corner of a matrix; Submatrix of given size with maximum 1's; Program to reverse the rows in a 2d Array; Check whether a Matrix is a.

How can I remove duplicate rows from this example data frame? A 1 A 1 A 2 B 4 B 1 B 1 C 2 C 2 I would like to remove the duplicates based on both the columns: A 1 A 2 B 4 B 1 C 2 Order is not important.Take a sequence of vector, matrix or data-frame arguments and combine by columns or rows,. (rows) of the matrix arguments. Any vectors have their values recycled or subsetted to achieve this length. For cbind (rbind), vectors of zero length (including NULL) are ignored unless the result would have zero rows (columns), for S compatibility. (Zero-extent matrices do not occur in S3 and are not.Create a Function. If you like to have a function where you can send your lists, and get them back without duplicates, you can create a function and insert the code from the example above.

Deleting duplicate rows in a matrix at random Hello, I am relatively new to R, and I've run into a problem formatting my data for input into the package RankAggreg. I have a matrix of gene titles and P-values (weights) in two columns: KCTD12 4.06904E-22 UNC93A 9.91852E-22 CDKN3 1.24695E-21 CLEC2B 4.71759E-21 DAB2 1.12062E-20 HSPB1 1.23125E-20.

This tutorial describes how to subset or extract data frame rows based on certain criteria. In this tutorial, you will learn the following R functions from the dplyr package: slice(): Extract rows by position; filter(): Extract rows that meet a certain logical criteria.

Remove duplicate rows in a two-dimensional table. addTobca: Add some elements of 0 mass to an existing mass function ads: The Captain's Problem. ads: Relation between variables. bca: Basic chance assignment mass function bcaPrint: Simple printing of a bca (0,1)-matrix and mass function bcaRel: Representation of a mass function in a product space belplau: Calculation of the degrees of Belief.

I have a matrix of gene-expression data from 50 samples whose rows are the probes and whose columns are the samples. There is an additional column consisting of the Entrez gene IDs for the probes.

The nrow R function returns the number of rows that are present in a data frame or matrix. Above, you can find the R code for the usage of nrow in R. You want to know more details? In this article, I’m going to provide you with several reproducible examples of typical applications of the nrow function in R. Example 1: Count the Number of Rows of a Data Frame.

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Determine Duplicate Rows Description. duplicated returns a logical vector indicating which rows of a data.table are duplicates of a row with smaller subscripts. unique returns a data.table with duplicated rows removed, by columns specified in by argument. When no by then duplicated rows by all columns are removed. anyDuplicated returns the index i of the first duplicated entry if there is one.

Find duplicate rows in a binary matrix; Maximum sum path in a Matrix; Construct a Doubly linked linked list from 2D Matrix; Minimum cost to reach from the top-left to the bottom-right corner of a matrix; Submatrix of given size with maximum 1's; Program to reverse the rows in a 2d Array; Check whether a Matrix is a Latin Square or not; Real-time application of Data Structures; Maximum of all.

Then use the advanced filter to remove duplicates. From here, VLOOKUP can return the original column data, and you have the original columns with no duplicates. If you need an example of this, I.

In Excel, it will remove all duplicate values and move up when you apply the Remove Duplicates function as screenshot 1 shown. However, in some cases, you may want to remove duplicates but keep the rest of the row values as screenshot 2 shown. Now, in this case, I will introduce some tricks on deleting duplicates but keeping the rest in Excel. Remove duplicates but keep rest of row values with.

In one of my previous articles, we learned practically about the Data Frame in R.Now, we will learn to perform the operations on R Data Frame - adding and removing Rows to a Data Frame in R. Apart from this, we will also learn to merge a Data Frame in R.

This page describes how to remove duplicate rows in Excel, using three different methods. If you want to remove duplicate cells (rather than entire rows of data), you may find the Remove Duplicate Cells page more straightforward. In order to illustrate how to remove duplicate rows in an Excel spreadsheet, we will use the example spreadsheet below, which has data spanning three columns.