> I am now working on writing a syntax to merge multiple categorical variables into one. In particular, I have no idea what this means: Provide some definition of what YOU mean by this. 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. Below are the categorical variables that could tell me the quality of health available to them. Cookies help us deliver our Services. We welcome all researchers, students, professionals, and enthusiasts looking to be a part of an online statistics community. How to combine several variables into a single variable is a FAQ. 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. Could anyone help me out with some tricks? Once the statistical issues are sorted out the writing of code will be pretty simple in either environment. This is a subreddit for discussion on all things dealing with statistical theory, software, and application. A very decent way to merge our small categories is creating a new variable with RECODE (syntax below, step 1). Select a Set Name and (optionally) a Set Label. 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. We realize that many readers may find this syntax too difficult to rewrite for their own data files. This example will focus on interactions between one pair of variables that are categorical in nature. I wish to combine the 4 categorical values into one with 4 labels/factors, as to see the distribution over the 11 years. 3. replace “doctor_and_nurse_rating”by the variable name you'd like to use for the final result. A factor is a categorical variable. So I would like to concatenate the entries into a new variable … recode into different variables, but I seem to be struggling (SPSS novice). 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. 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. Keep in mind that this new variable doesn't come with any variable labels or value labels. Press question mark to learn the rest of the keyboard shortcuts. In probability theory, the multinomial distribution is a generalization of the binomial distribution. SPSS: Frequency table of multiple variables with same values. The new dummy variables - NewYork, California, and Illinois - would be numeric indicator variables. Select the option Organize output by groups. Above code is dropping first dummy variable columns to avoid dummy variable trap. 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. 390. In SPSS, this type of transform is called recoding. 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. I have a problem in Stata. I don't think this is as simple as a recode or compute, but I'd love to be wrong. Alternatively, you may be trying to create a total awareness variable. there's still 5 levels (None,A,B,C,D). For example, it models the probability of counts for rolling a k-sided die n times. Are you trying to combine them into one variable with four levels? 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. Click Continue. Ive tried different approaches, e.g. In our previous post, we described to you how to handle the variables when there are categorical predictors in the regression equation. The main reason for wanting to combine variables in SPSS is to allow two or more categorical variables to be treated as one. [ ^PM | Exclude ^me | Exclude from ^subreddit | FAQ / ^Information | ^Source | ^Donate ] Downvote to remove | v0.28. An interaction can occur between independent variables that are categorical or continuous and across multiple independent variables. Merging variables. Basically, k-1 dummy variables are needed, if k is a number of categorical variable in one column. WHat does the combined variable tell you and what does it leave out? Please reply to the list and not to my personal email. 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. Combine 2 dichotomous variables into 1 categorical. e.g. Note that you can do so by using the ctrl + h shortkey. Below are the steps to generate a frequency table of multiple variables … If that's the case it won't be possible to say anything without you making the goals of this combining clearer. Thank you. This is called a two-way interaction. 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. Hello All, I will probaby pose an elemental question, but at this moment I'm completely bugged out. How to combine variables in SPSS? https://www.sv-europe.com/blog/combine-variables-spss-statistics 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. 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. See this old thread, for example: What would you do if you didn't have SPSS? SPSS is an easy-to-use comprehensive data analysis program that can be used on quantitative data. Click Categorical. 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. 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. I would like to combine multiple categorical variables into one variable. Press J to jump to the feed. 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. 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 . Using if statement is really not a good solution. In a linear regression model, the dependent variables should be continuous. They make up a sum of about 2 million cases. Okay, so how would one approach this problem in R? Hello, I have 4 categorical variables (disease diagnosis) who run over the span of 11 years, yes/no. 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. Cleaning up factor levels (collapsing multiple levels/labels) (10 answers) Closed 3 years ago. The data are coded such that 1 = Male and 2 = Female, which means that Female is the reference. Variables can be combined in SPSS by adding or multiplying them together. if you're counting how many diseases they have and ignoring which ones, you have 5 levels (0,1,2,3,4). 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? To split the data in a way that separates the output for each group: Click Data > Split File. If you missed that, please read it from here. Finally, we'll inspect if the result is correct by running CROSSTABS. We'll call this new variable rec_nation which is short for “recoded nation”. Dear all, I have 2 ordinal variables (quintiles). Researchers often want to combine two or more variables in order to create a new variable. Now I want to create a new categorical variable which combine all levels of those ordinal ones. 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. 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. What 4 levels will you have, and why four rather than the 16 actual combinations? In the Variable Coding area, select the Dichotomies option and specify a Counted Value of 1. New comments cannot be posted and votes cannot be cast. Please clarify what you're trying to achieve! 2. replace “nurse_rating”by the name of the second variable you'd like to combine. 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. SPSS will automatically create dummy variables for any variable specified as a factor, defaulting to the highest (last) value as the reference. Select gender as a categorical covariate. So my new var will have 25 categories. Any suggestions as to how to approach this? Creating dummy variables in SPSS Statistics Introduction. If you cannot possibly have more than one disease (how??) 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. 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. 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. They make up a sum of about 2 million cases. Hello, I have 4 categorical variables (disease diagnosis) who run over the span of 11 years, yes/no. Does no one have more than one of the diseases? How to recode multiple response variables in SPSS into a single categorical variable. Multiple regression allows researchers to evaluate whether a continuous dependent variable is a linear function of two or more independent variables. e.g. I am now learning R ... How to assign colors to categorical variables in ggplot2 that have stable mapping? 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. There is a variable asking about the status of children. 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. When n is 1 and k is 2, the multinomial distribution is the Bernoulli distribution. 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. 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. We'll therefore apply these ourselves. You can merge two or more variables to form a new variable. (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).  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 By using our Services or clicking I agree, you agree to our use of cookies. The variable name is CV_CHILD_STATUS_01, CV_CHILD_STATUS_02 and CV_CHILD_STATUS_03. 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. 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Predictors in the variable name is CV_CHILD_STATUS_01, CV_CHILD_STATUS_02 and CV_CHILD_STATUS_03: https: //groups.google.com/forum/ # topic/comp.soft-sys.stat.spss/VaPvJHdZ5-0! Wish to combine several variables into one sum of about 2 million cases I would to! Old thread, for example: what would you do if you 're counting how many diseases have. Columns to avoid dummy variable columns to avoid dummy variable columns to avoid dummy trap., if k is a number of categorical variable which combine all levels of ordinal... To transform a variable by combining some of its categories or values together merge multiple categorical variables are... And ignoring which ones, you agree to our use of cookies read! One pair of variables that could tell me the quality of health available to.! Our dataset will want to combine two or more variables in order to create a total variable.