You can also use the recode command to recode more than one variable at a time. You can do this through Recode into different variable. In the previous two chapters, we have focused on regression analyses using continuous variables. If the variables are next to each other, you can use the TO syntax. We may need to convert a continuous variable into a categorical one eg Age from a list of numbers to groups less than 20 21-30, over 31. SPSS will not stop you from using a continuous variable as a splitting variable, but it is a bad idea to try to attempt this; SPSS will see each unique numeric value as a distinct category. RANK VARIABLES = var1 TO varXX /rank into rvar1 to rvarXX /NTILES (99) INTO new1 to newXX. Screenshots of every step is provided in an easy to follow tutorial of how to … Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. You may follow along by downloading and opening hospital.sav. Dichotomize Multiple Variables SPSS Recode Example 2. The main reason for wanting to combine variables in SPSS is to allow two or more categorical variables to be treated as one. 2 Put the variable you want to recode in the Input Variable → Output Variable box. A format is a named, pre-defined pattern that tells SPSS how to interpret and/or display different types of variables. For example, if you are grouping BMI you might use the name ’BMIgroup’. Below we see summary statistics for length. Recoding Variables 1. Analyzing Categorical Variables Separately By Ruben Geert van den Berg under SPSS Data Analysis. A new dialog, Compute Variable: If Cases, will open. For example, we may want to rename a variable called Sex to Gender. It isn’t unusual for this data to have been entered as string values — alphanumeric characters. *rank the variables and determine the percentiles. *varXX represents the last variable in your data. You can combine variables in SPSS by following a rather simple process. In the Output Variable box, type in a name for the new (grouped) variable. Suppose you have a variable score that you need to collapse into five distinct categories in a new variable grade:. Published with written permission from SPSS Statistics, IBM Corporation. Value 6 is is left unaltered. This tutorial shows how to do so for dichotomous or categorical variables. One higher group (which is beyond the normal tabulation or lower group) Next, RECODE usually used for CHI-SQUARE analysissteps to make your continuous data become categorical variables. A step by step guide to recoding AGE variables into generational groups in SPSS. In SPSS, you have two options for collapsing and recoding continuous variables: the IF command and the RECODE command.. Alternatively, you may be trying to create a total awareness variable. 4. Select the variable to be dichotomized. There are two ways of recoding a variable. Let’s use the auto data for our examples. It also adds the string value as a label to the numeric value. Values that do not meet any of the conditions of the rules are left unchanged, unless an otherwise rule is speciﬁed. Example: The data given below represents runs scored by 5 batsmen in a national-level match. The easiest way is to let SPSS automatically do it for you. Suppose we wanted to make a variable called length2 which has lengthsquared. In that case you would use a system called simple coding. To create a new string variable, declare the variable with the STRING command before specifying it on RECODE. Recode the data so that the batsmen are rank ordered by their number of runs, with the batsman with the highest runs given a code of "1" and the batsman with the lowest runs given a "5". Note that all variables are numericwith proper value labels applied to them. Let's use the compute command to make a new variable that has the length in feet instead of inches, called lenft. After recoding we must respecify the value labels for all three variables. Click on Change. Click the “ Transform ” menu at the top of the SPSS data sheet, then select “ Recode Into Different Variable,” because you will transform the categorical variable into one or more dichotomous or dummy variables. Note that you'll often want to apply or adjust some value labels after recoding. Third: Transform the new variable into categorical. Using the RECODE, we can ask the SPSS to detect and class those data into two groups. To change a variable's name, double-click on the name of the variable that you wish to r… I am trying to build a syntax. SPSS Statistics Recode single values in SPSS Statistics. The result is shown in the screenshot below. Regardless of the coding system you choose, the overall effect of the categorical variable … Click on Old and New Values. The variable rep78 is coded 1 through 5 standing for poor, fair, average, good and excellent. Below is syntax that will generate percentiles and recode them into new variables. Background: I have two variables based on the same item of a survey. 3. Note that you can shorten the comman… The first step in doing so is creating appropriate tables and charts. There are a variety of coding systems that can be used when recoding categorical variables. In the Compute Variable dialog, type "event_shift" (without the quotes) into the Target Variable box and type "1" (without quotes) into the Numeric Expression box. Click on right-arrow button and type in name of new variable, then press Change. SPSS will sort the string values from highest to lowest (or vice versa) and then assign consecutive numbers to the values. Recoding variables in SAS. Transfer the variable you want to recode by selected it and pressing the button, and give the new variable a name and label. 3.0 Introduction. Renaming a variable simply changes the name of that variable while leaving everything else the same. Now say we'd like to combine “doctor_rating” and “nurse_rating” (near the end of the file). You really should avoid alphanumerics, though, and there is a simple way to make the data better: the Automatic Recode command. The following command accomplishes this: RECODE q1 (5=1)(4=2)(2=4)(1=5). Suppose you want to recode an existing variable q1 so that the scale is inverted (i.e., 5=1, 4=2, 3=3, 2=4, 1=5). Target variables must already exist. Repeat this procedure for all variables to be dichotomized before proceeding further. Transfer the variable you want to recode by selected it and pressing the button, and give the new variable a name and label. If the new values are shorter than the defined width of the target variable, the values are right-padded with blanks. Click the If button in the lower left corner of the Compute Variable dialog. 3.6 Continuous and Categorical variables 3.7 Interactions of Continuous by 0/1 Categorical variables 3.8 Continuous and Categorical variables, interaction with 1/2/3 variable 3.9 Summary 3.10 For more information . The variable length contains the length of the car in inches. Click on T ransform > R ecode Into Different Variables... in the top menu. including nominal and ordinal variables in linear regression analysis For example, you may want to compare each level of the categorical variable to the lowest level (or any given level). The IF command. The recode command recodes a nominal variable that has a limited number of values.. IF (score > 90) grade=4. Fortunately, the Create Dummy Variables procedure in SPSS Statistics version 22 and above automatically creates a dummy variable for every category of your categorical independent variable. In IBM SPSS Statistics, people frequently have categorical variables with lots of values. I have an spss datafile which separated responses from two groups of participants on the same survey question into two variables in SPSS (i.e. Variable names can not contain spaces. 5. IF (score <=90 AND score >= 80) grade=3. Recoding both string and numeric variables in SPSS is usually done with RECODE. The splitting variable(s) should be nominal or ordinal categorical. Or we might want to make loglen which is the natural log of length. Hi all, I am getting back into using SPSS after a few years, and I am going crazy trying to figure out how to recode two different variables into one variable with conditions. 2. 2. This opens a window that displays the variables in your data set. When analyzing your data, you sometimes just want to gain some insight into variables separately. Consider the example of a […] The name of the variable, which is used to refer to that variable in syntax. Doing so with syntax is wayfaster than with the menu, especially if you want to recode many variables at once. Note that when you change the name of a variable, it does not change the data; all values associated with the variable stay the same. recode — Recode categorical variables DescriptionQuick startMenuSyntax OptionsRemarks and examplesAcknowledgmentAlso see Description recode changes the values of numeric variables according to the rules speciﬁed. The new string values cannot be longer than the defined width of the target variable. The variables, in this case, need to have … I have an spss datafile which separated responses from two groups of participants on the same survey question into two variables in SPSS (i.e. 2 Categorising a continuous variable 1 Choose Transform, Recode, Into Diﬀerent Variables. Instead, they need to be recoded into a series of variables which can then be entered into the regression model. If I understand you, you want to replace string variables with a code, so you can analyse it whit a chi-square test, appropiate for categorical data. We would like to change rep78 so that it has only three values, 1 through 3, standing for below average, average, and above average. There are a variety of coding systems that can be used when recoding categorical variables, and which one you select depends on the comparisons that you want to make. In almost every situation, you want to use Into Different Variables.Recoding Into Same Variables replaces the values in the existing variable. However, this is not the case for the Recode into Different Variables procedure in SPSS … We'll dichotomize variables v4 to v6 by changing values 1, 2 and 3 into 0 and values 4 and 5 into 1 as implied by recode v4 to v6 (1,2,3 = 0)(4,5 = 1). SPSS offers two choices under the recode command: Into Same Variable and Into Different Variables. How to Recode Variables in SPSS. 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