Create New Variables - Duplicates

Create a new variable which identifies the cases in a data set which have duplicated values in one or more variables. This is useful when wanting to identify cases to delete from the data set.

The Duplicates feature can take a single variable input, or it can take multiple variables as inputs. The new variable has two categories, Yes and No which indicate which cases are and are not duplicated, respectively Duplicates are identified starting at the top of the data file and moving down. The first case with a particular value (or combination of values if you have selected more than one variable) will be assigned a vale of No, and then any cases lower down in the file who have identical values will be assigned a value of Yes.

Usage

In Q:

1. Select one or more variables in the Variables and Questions tab.
2. Select Automate > Browse Online Library > Create New Variables > Duplicates.

If you wish to change the variables that are being used to identify duplicates, then

1. Select the Duplicates variable in the Variables and Questions tab.
2. Right-click and select Edit R Variable.
3. Choose variables in the Variables box.
4. Click Update R Variable.

In Displayr:

1. Select one or more variables the Data Sets tree.
2. Select Anything > Data > Variables > New > Ready-Made-New-Variables >  Duplicates.

If you wish to change the variables that are being used to identify duplicates, then

1. Select the Duplicates variable in the Data Sets tree.
2. Choose variables in the Variables box
3. Click Calculate.

How to apply this QScript

• Start typing the name of the QScript into the Search features and data box in the top right of the Q window.
• Click on the QScript when it appears in the QScripts and Rules section of the search results.

OR

• Select Automate > Browse Online Library.
• Select this QScript from the list.

Customizing the QScript

This QScript is written in JavaScript and can be customized by copying and modifying the JavaScript.

Customizing QScripts in Q4.11 and more recent versions

• Start typing the name of the QScript into the Search features and data box in the top right of the Q window.
• Hover your mouse over the QScript when it appears in the QScripts and Rules section of the search results.
• Press Edit a Copy (bottom-left corner of the preview).
• Modify the JavaScript (see QScripts for more detail on this).
• Either:
  • Run the QScript, by pressing the blue triangle button.
  • Save the QScript and run it at a later time, using Automate > Run QScript (Macro) from File.

Customizing QScripts in older versions

• Copy the JavaScript shown on this page.
• Create a new text file, giving it a file extension of .QScript. See here for more information about how to do this.
• Modify the JavaScript (see QScripts for more detail on this).
• Run the file using Automate > Run QScript (Macro) from File.

JavaScript

▶ Show Code

See also

• QScript for more general information about QScripts.
• QScript Examples Library for other examples.
• Online JavaScript Libraries for the libraries of functions that can be used when writing QScripts.
• QScript Reference for information about how QScript can manipulate the different elements of a project.
• JavaScript for information about the JavaScript programming language.
• Table JavaScript and Plot JavaScript for tools for using JavaScript to modify the appearance of tables and charts.