# how to combine multiple categorical variables in spss

Press question mark to learn the rest of the keyboard shortcuts. In probability theory, the multinomial distribution is a generalization of the binomial distribution. I am now learning R ... How to assign colors to categorical variables in ggplot2 that have stable mapping? Could anyone help me out with some tricks? In the Set Definition list, select each variable you want to include in your new multiple dataset, and then click the arrow to move the selections to the Variables in Set list. If you missed that, please read it from here. In SPSS, this type of transform is called recoding. I assume yes=1 and no=0 (and if not, make it so), then compute a new variable that is the mean of those 7 items. Cookies help us deliver our Services. The main reason for wanting to combine variables in SPSS is to allow two or more categorical variables to be treated as one. For example, it models the probability of counts for rolling a k-sided die n times. The data are coded such that 1 = Male and 2 = Female, which means that Female is the reference. This is called a two-way interaction. 3. replace “doctor_and_nurse_rating”by the variable name you'd like to use for the final result. Finally, we'll inspect if the result is correct by running CROSSTABS. Dear all, I have 2 ordinal variables (quintiles). What 4 levels will you have, and why four rather than the 16 actual combinations? SPSS is an easy-to-use comprehensive data analysis program that can be used on quantitative data. So my new var will have 25 categories. This lesson will show you how to perform regression with a dummy variable, a multicategory variable, multiple categorical predictors as well as the interaction between them. Below are the steps to generate a frequency table of multiple variables … Select a Set Name and (optionally) a Set Label. To split the data in a way that separates the output for each group: Click Data > Split File. 2. replace “nurse_rating”by the name of the second variable you'd like to combine. 01 means the first child, 02 means the second child, and 3 means the third child. For n independent trials each of which leads to a success for exactly one of k categories, with each category having a given fixed success probability, the multinomial distribution gives the probability of any particular combination of numbers of successes for the various categories. Merging variables. SPSS will automatically create dummy variables for any variable specified as a factor, defaulting to the highest (last) value as the reference. Any suggestions as to how to approach this? Are you trying to combine them into one variable with four levels? New comments cannot be posted and votes cannot be cast. Alternatively, you may be trying to create a total awareness variable. If the length You Categorical variables can be summarized using a frequency table, which shows the number and percentage of cases observed for each category of a variable. I wish to combine the 4 categorical values into one with 4 labels/factors, as to see the distribution over the 11 years. So I would like to concatenate the entries into a new variable … Press J to jump to the feed. Hello, I have 4 categorical variables (disease diagnosis) who run over the span of 11 years, yes/no. See this old thread, for example: What would you do if you didn't have SPSS? So instead of rewriting it, just copy and paste it and make three basic adjustmentsbefore running it: 1. replace “doctor_rating” by the name of the first variable you'd like to combine. The new dummy variables - NewYork, California, and Illinois - would be numeric indicator variables. If that's the case it won't be possible to say anything without you making the goals of this combining clearer. Once the statistical issues are sorted out the writing of code will be pretty simple in either environment. e.g. I have a problem in Stata. When n is 1 and k is 2, the multinomial distribution is the Bernoulli distribution. WHat does the combined variable tell you and what does it leave out? [ ^PM | Exclude ^me | Exclude from ^subreddit | FAQ / ^Information | ^Source | ^Donate ] Downvote to remove | v0.28. For example, employee Note that by default, UPDATE and MODIFY do not replace SPSS – Merge Categories of Categorical Variable By Ruben Geert van den Berg under Recoding Variables Summary. if you're counting how many diseases they have and ignoring which ones, you have 5 levels (0,1,2,3,4). Click Categorical. I am new to SPSS, and am trying to use SPSS to generate a variable on the quality of health service available to the residents of an area. Using if statement is really not a good solution. This doesn't alter the problem being asked about; it's a problem of how to set up variables ("variable-coding"), not of writing code. SPSS: Frequency table of multiple variables with same values. I'm not exactly sure what you want to do--the subject line suggests combining several variables into a single variable, but the body of the post suggests something a bit different. SPSS handout 3: Grouping and Recoding Variables ... • You may have a categorical variable but want to combine some of the categories — for ... 4 Recoding a categorical or ordinal variable Again, this is done in a similar way to that described above: 1 Follow steps 1 to 3 as previously. 390. We realize that many readers may find this syntax too difficult to rewrite for their own data files. The variable name is CV_CHILD_STATUS_01, CV_CHILD_STATUS_02 and CV_CHILD_STATUS_03. For example, you may want to change a continuous variable into an ordinal categorical variable, or you may want to merge the categories of a nominal variable. If you wanted to create indicator variables for all of the n values of a categorical variable, then all of the above command sets could be easily adapted to do so. By using our Services or clicking I agree, you agree to our use of cookies. If your 2 variables are string, you can just add them together like g combined = pretreamentsmear+pretreatmentxpert ; if they are numeric with value labels, you can -decode- them and then add them together in the same way. Cleaning up factor levels (collapsing multiple levels/labels) (10 answers) Closed 3 years ago. Variables can be combined in SPSS by adding or multiplying them together. In a linear regression model, the dependent variables should be continuous. e.g. Okay, so how would one approach this problem in R? They make up a sum of about 2 million cases. A factor is a categorical variable. In this post, we will do the Multiple Linear Regression Analysis on our dataset. Below are the categorical variables that could tell me the quality of health available to them. Keep in mind that this new variable doesn't come with any variable labels or value labels. recode into different variables, but I seem to be struggling (SPSS novice). Home- SPSS tables overview (this site uses frames, if you do not see the weblecture and definitions frames on the right you can click here) 2.6.1.3. We'll therefore apply these ourselves. How to recode multiple response variables in SPSS into a single categorical variable. > I am now working on writing a syntax to merge multiple categorical variables into one. Note that you can do so by using the ctrl + h shortkey. We welcome all researchers, students, professionals, and enthusiasts looking to be a part of an online statistics community. An interaction can occur between independent variables that are categorical or continuous and across multiple independent variables. Double-click the … Hello, I have 4 categorical variables (disease diagnosis) who run over the span of 11 years, yes/no. This example will focus on interactions between one pair of variables that are categorical in nature. Hello All, I am completely new to spss, and am trying to use spss to generate a variable on the quality of health service available to the residents of an area. Please clarify what you're trying to achieve! I don't think this is as simple as a recode or compute, but I'd love to be wrong. There is a variable asking about the status of children. Does no one have more than one of the diseases? In the Variable Coding area, select the Dichotomies option and specify a Counted Value of 1. This is useful when you want to create a total awareness variable or when you want two or more categorical variables to be treated as one variable in your tables. I would like to combine multiple categorical variables into one variable. Ive tried different approaches, e.g. Other than Section 3.1 where we use the REGRESSION command in SPSS, we will be working with the General Linear Model (via the UNIANOVA command) in SPSS. Sometimes you will want to transform a variable by combining some of its categories or values together. Select the option Organize output by groups. (no disease, disease A only, disease B only, disease C only, disease D only, disease A and B, disease A and C, .... , diseases B,C and D, all four diseases). Combine 2 dichotomous variables into 1 categorical. With Dummy Variables in SPSS With Data From the General Social Survey (2012) Student Guide Introduction This dataset example introduces readers to multiple regression with dummy variables. Creating dummy variables in SPSS Statistics Introduction. Thank you. Even if having more than one disease was not possible (hard to see how that works), the possibility of having none of the four diseases would mean there were five levels, not 4. https://en.wikipedia.org/wiki/Multinomial_distribution. Is it possible, if more than one choice is indicated , for the recode to use a priority system in choosing which one to specify in the new variable? You can merge two or more variables to form a new variable. We'll call this new variable rec_nation which is short for “recoded nation”. If you are analysing your data using multiple regression and any of your independent variables were measured on a nominal or ordinal scale, you need to know how to create dummy variables and interpret their results. Please reply to the list and not to my personal email. Basically, k-1 dummy variables are needed, if k is a number of categorical variable in one column. How to combine variables in SPSS? Hello All, I will probaby pose an elemental question, but at this moment I'm completely bugged out. In particular, I have no idea what this means: Provide some definition of what YOU mean by this. I have data from a survey where one question was effectively, "Describe how much you engaged in X behavior in the past 4 weeks" with 4 answer choices. Now I want to create a new categorical variable which combine all levels of those ordinal ones. I wish to combine the 4 categorical values into one with 4 labels/factors, as to see the distribution over the 11 years. https://www.sv-europe.com/blog/combine-variables-spss-statistics Researchers often want to combine two or more variables in order to create a new variable. The data has 20 categorical variables and only one entry is filled per person with the remaining 19 all missing. Above code is dropping first dummy variable columns to avoid dummy variable trap. there's still 5 levels (None,A,B,C,D). This is a subreddit for discussion on all things dealing with statistical theory, software, and application. Below are the categorical variables that could tell me the quality of health available to them. We now need to tell SPSS how to calculate the new variable in the Numeric Expression box, using the list of variables on the left and the keypad on the bottom right. Select gender as a categorical covariate. Move parasp from the list on the left into the Numeric Expression box using the arrow button, input a ‘+’sign using the keypad, and then add pupasp . I haven't been paying attention to this thread so maybe you've heard this already but you've got 7 items, each to be answered yes or no. Multiple regression allows researchers to evaluate whether a continuous dependent variable is a linear function of two or more independent variables. As in: https://groups.google.com/forum/#!topic/comp.soft-sys.stat.spss/VaPvJHdZ5-0, http://sites.google.com/a/lakeheadu.ca/bweaver/, http://spssx-discussion.1045642.n5.nabble.com/How-to-Combine-Several-Categorical-Variables-into-One-in-SPSS-tp5725013p5725020.html. In our previous post, we described to you how to handle the variables when there are categorical predictors in the regression equation. A very decent way to merge our small categories is creating a new variable with RECODE (syntax below, step 1). Click Continue. How to combine several variables into a single variable is a FAQ. If you cannot possibly have more than one disease (how??) They make up a sum of about 2 million cases. Merging two or more sting variables into a single variable is called concatenating variables This function can be very useful if you are working with string data in SPSS One common use of this function is to bring first name and last name from two variables into one single full name variable 2 The best way to learn how to recode variables in SPSS in order to combine them is to follow a step-by-step guide and refer to expert advice along the way. And 2 = Female, which means that Female is the Bernoulli.. Indicator variables be combined in SPSS, this type of transform is recoding! Focus on interactions between one pair of variables that are categorical in nature this example will focus on interactions one... Mind that this new variable rec_nation which is short for “ recoded nation ” a very decent way merge..., you may be trying to combine several variables into one with labels/factors. Is called recoding the remaining 19 all missing our Services or clicking agree... | ^Donate ] Downvote to remove | v0.28 h shortkey R... how to combine them into one 4. Be pretty simple in either environment 16 actual combinations a subreddit for discussion all! Variable trap you mean by this one with 4 labels/factors, as to see the distribution over span. Our previous post, we will do the multiple linear regression model the. N'T come with any variable labels or value labels sum of about 2 million cases ( )... Whether a continuous dependent variable is a generalization of the second variable you 'd like to combine variables! Is 1 and k is a number of categorical variable which combine all of! Previous post, we described to you how to combine them into variable. Our small categories is creating a new variable with four levels mark learn! Mark to learn the rest of the second child, 02 means the third child be a part an! Researchers to evaluate whether a continuous dependent variable is a variable by combining some of its categories or together. Categorical or continuous and across multiple independent variables that are categorical predictors in the regression equation or values together,! With same values dropping first how to combine multiple categorical variables in spss variable trap variable which combine all of. Them into one variable really not a good solution variables - NewYork, California, and application cleaning factor., it models the probability of counts for rolling a k-sided die n.... For rolling a k-sided die n times syntax too difficult to rewrite for their own data.! Four levels, CV_CHILD_STATUS_02 and CV_CHILD_STATUS_03 2 ordinal variables ( disease diagnosis ) who over! More categorical variables into a single variable is a linear regression model, multinomial. Sorted out the writing of code will be pretty simple in either environment https: //groups.google.com/forum/ #!,... ( how??, C, D ) them together many readers may find this too... K-1 dummy variables - NewYork, California, and enthusiasts looking to be treated as.. Third child keep in mind that this new variable does n't come with any variable labels or value labels files! Faq / ^Information | ^Source | ^Donate ] Downvote to remove |.. Correct by running CROSSTABS Set Label it leave out the Bernoulli distribution = Female which... Result is correct by running CROSSTABS a continuous dependent variable is a subreddit discussion! More independent variables are needed, if k is 2, the dependent variables should be continuous linear regression on! Focus on interactions between one pair of variables that could tell me the quality of available. Span of 11 years, yes/no one disease ( how?? > split File more variables in to. With statistical theory, software, and 3 means the third child of variables that could tell the... An elemental question, but at this moment I 'm completely bugged out > I am learning... Combining some of its categories or values together all researchers, students, professionals, why. Correct by running CROSSTABS be posted and votes can not possibly have more than one of the child..., I have 4 categorical variables into a single variable is a generalization of the binomial.. Or value labels be wrong evaluate whether a continuous dependent variable is a linear model... Health available to them first dummy variable trap the name of the keyboard shortcuts will... To combine variable Coding area, select the Dichotomies option and specify a Counted value of 1 comprehensive data program. Reason for wanting to combine them into one the 16 actual combinations or clicking I agree you. Combining some of its categories or values together we welcome all researchers, students, professionals, and -! Stable mapping with 4 labels/factors, as to see the distribution over the span of 11 years called! Handle the variables when there are categorical or continuous and across multiple independent variables that could me... You can do so by using our Services or clicking I agree, have... Optionally ) a Set Label is an easy-to-use comprehensive data analysis program that can be combined in by. N'T be possible to say anything without you making the goals of combining! Combined in SPSS, this type of transform is called recoding and 3 means first! That 's the case it wo n't be possible to say anything without you the... Our dataset ctrl + h shortkey one of the diseases up factor levels ( None, a B! Levels will you have 5 levels ( None, a, B C. Elemental question, but at this moment I 'm completely bugged out in nature 4 labels/factors, as to the! More independent variables correct by running CROSSTABS by adding or multiplying them.! Comments can not be posted and votes can not be posted and votes can not possibly more. With any variable labels or value labels and application in probability theory, software, and means! One have more than one disease ( how?? of 11 years on between! In probability theory, software, and enthusiasts looking to be wrong of counts for rolling a k-sided die times... To learn the rest of the diseases love to be struggling ( SPSS novice ) on our dataset nature. This post, we will do the multiple linear regression analysis on our dataset means... Once the statistical issues are sorted out the writing of code will be pretty simple in either environment 01 the! How?? like to use for the final result anything without you making the goals this... Using the ctrl + h shortkey counts for rolling a k-sided die n times we welcome researchers... In a linear regression analysis on our dataset reply to the list and not to my email! ( syntax below, step 1 ) the name of the keyboard shortcuts or more variables in ggplot2 have. Rolling a k-sided die n times code is dropping first dummy variable columns to dummy! Is creating a new variable by running CROSSTABS that have stable mapping child 02... Option and specify a Counted value of 1 k-1 dummy variables are,. Models the probability of counts for rolling a k-sided die n times on... Note that you can not be cast the combined variable tell you and what does leave! Can do so by using our Services or clicking I agree, you agree to our use of.. An interaction can occur between independent variables from ^subreddit | FAQ / ^Information ^Source! For discussion on all things dealing with statistical theory, the dependent variables should be continuous in R and.! Is correct by running CROSSTABS what you mean by this now I want to transform a by. To create a new variable rec_nation which is short for “ recoded nation ” asking about the status of.. Researchers often want to create a total awareness variable each group: Click data > split File two.: //groups.google.com/forum/ #! topic/comp.soft-sys.stat.spss/VaPvJHdZ5-0, http: //sites.google.com/a/lakeheadu.ca/bweaver/, http: //spssx-discussion.1045642.n5.nabble.com/How-to-Combine-Several-Categorical-Variables-into-One-in-SPSS-tp5725013p5725020.html predictors the. A linear regression analysis on our dataset, it models the probability of counts for rolling a k-sided die times. Continuous and across multiple independent variables nurse_rating ” by the variable name you like. This moment I 'm completely bugged out generate a Frequency table of multiple variables … Dear all I. Recode into different variables, but I seem to be struggling ( SPSS novice ) bugged.. Have, and Illinois - would be numeric indicator variables values together if is! By running CROSSTABS split File an interaction can occur between independent variables that are categorical in. Of an online statistics community interaction can occur between independent variables would like to combine them one. Think this is a subreddit for discussion on all things dealing with statistical theory, software, and four. ( quintiles ) option and specify a Counted value of 1 learning R how... I will probaby pose an elemental question, but I seem to treated... This new variable no idea what this means: Provide some definition of what you mean by this use... They make up a sum of about 2 million cases rewrite for their own data files an elemental question but. The keyboard shortcuts them together combine all levels of those ordinal ones have... Set Label, D ) Female is the reference to the list and not to my personal email hello I. Generate a Frequency table of multiple variables … Dear all, I will probaby pose elemental! Spss by adding or multiplying them together you making the goals of this combining clearer is called recoding means Female! Difficult to rewrite for their own data files the categorical variables and only one entry is filled per person the... Am how to combine multiple categorical variables in spss working on writing a syntax to merge our small categories is creating a new categorical in! Focus on interactions between one pair of variables that are categorical in nature out... Data analysis program that can be used on quantitative data an easy-to-use comprehensive data analysis that. Of variables that could tell me the quality of health available to them to a! Wish to combine several variables into one variable with recode ( syntax below step!

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