This is a generic function with methods for vectors data frames and arrays including matrices. This would most commonly be used for matrices to find unique rows the default or columns with margin 2.
By andrie de vries joris meys.
Unique table r. The array method calculates for each element of the dimension specified by margin if the remaining dimensions are identical to those for an earlier element in row major order. Anyduplicated returns the index i of the first duplicated entry if there is one and 0 otherwise. The tutorial looks as follows.
Unique returns a data table with duplicated rows removed by columns specified in by argument. Count unique values with table function. This may be a designer case of business in the front party in the back an unusual base featuring two silver loops is what makes the dining table in this room by maine design.
This built in dataset describes fuel consumption and ten different design points from 32 cars from the 1970s. To figure out what data can be factored when working in r let s take a look at the dataset mtcars. In this r tutorial you ll learn how to count the frequency of unique values of a vector or data frame column.
The most unique dining tables. Here we use a fictitious data set smoker csv this data set was created only to be used as an example and the numbers were created to match an example from a text book p. Unique values of a vector.
How to count unique data values in r. Unique values of a matrix and unique rows of the dataframe in r is obtained by using unique function in r. There are lots of unique dining table ideas here for all kinds of spaces.
Unique function in r unique eliminates duplicate elements rows from a vector data frame or array. Hence old behavior would be something like. How to count unique data values in r.
We will looking at the following example which depicts unique function in r. We have unique dining tables for small spaces and transforming extendable ones for those who love to entertain. To have it use the key columns explicitly pass by key dt into unique replacing dt in the call to key with the name of the data table.
We have covered unique coffee tables now we have searched high and low for a wide variety of the most awesome tables on the planet. When no by then duplicated rows by all columns are removed. As of data table 1 9 8 unique data table method uses all columns by default which is consistent with the unique data frame in base r.
629 of the 4th edition of moore and mccabe s introduction to the practice of statistics. Creating a table from data. Unique function in r.
Count unique values in r 3 examples frequency of vector or column. We first look at how to create a table from raw data.