If you think you might forget, first clone the variable, then use the cloned variable to recode. Worksheet for recoding in s tata remember to include the gen at the end in order to make a new variable. You can define values to recode in this dialog box. Variables may either be recoded into numeric variables or into string variables. Recoding variables in r, seems to be my biggest headache. I tried to use if but it works only for one condition or for nested conditions, which is not my case. For spss and sas, you may need to install it by typing ssc install. The variable rep78 is coded 1 through 5 standing for poor, fair, average, good and excellent. You fill in the variable you want to recode in the variables.
This module should be installed from within stata by typing ssc install. Recoding variables in spss statistics introduction. The recode command combines 4 or the 5 steps required for the replace command. We would like to change rep78 so that it has only three values, 1 through 3, standing for below average, average, and above average. The syntax is just destring variable, replace, where variable should be replaced by the name of the variable or variables to be destringed. I am recoding two binary variables into new variable such that any 1s in the first variable take a 0 in the new one and all digits in the second variable are preserved. If i import from excel, using first row as var names, stata replaces the numerical. Suppose i have a variable for ethnicity and this is a text variable, and i would like to get a numeric variable out of it. Windows users should not attempt to download these files with a web browser. How do i recode a race variable keeping the same variable name. Government information and does not represent the views or positions of the u. Stata module to rename value labels to match variable names. If you select multiple variables, they must all be the same type. Importing and exploring data stata research guides at bates.
In stata you can create new variables with generate and you can modify the values of an existing variable with replace and with recode. This module shows how to create and recode variables. If the string variable contains anything but numbers, you can add the force option to tell stata to convert it anyway, but observations with any nonnumeric characters will get a missing value. One way to do is to type command tab 10 times for the first example, and type recode for each variable as many as they are for the second example. This will code m as 1 and f as 2, and put it in a new column. Behavior recode for analysis definition of the variable and how it was created for each data release cancer stage variables definitions of stage variables based on ajcc and changes to seer staging definitions over time. You can recode single values, ranges of values, and missing values. But there is probably extra stuff in the variable that caused it. Recoding variables in spss statistics single values. Create variable and value labels, rename variables, change display formats, and. The only step remaining is to label the new variable with a label var statement.
How is the name of the town hingham, massachusetts, pronounced. Now i want to recode 2 to 0 based on the value label no. Quick start change the name of v1 to var1 rename v1 var1 also change the name of v2 to var2 rename v2 var2 menu data data utilities rename groups of variables syntax rename old varname new varname remarks and examples stata. Normally, the recoded variable is not supposed to replace the original variable. If you wish to change the categories of a variable, you may employ the command recode. You can use recoding to produce different values or codes for a variable. Im trying to recode a categorical variable into a binary variable. If a variable is recoded, the label name defaults to newvar unless a label with that name already exists.
Renaming variables are made easy by the commands rename. Married2 now let us recreate the married variable using the recode statement. To recode into different variables, click transform recode into different variables. To use recode, you must provide a list of variables to be recoded and the rules associated with that change for a variable for example, q1 that contains integers ranging from 1 to 7, to collapse the values into three categories, use. Recode the same value pattern for all variables in stata. Creating and recoding variables stata learning modules. What functions, packages, processes do you use to ensure the best result. We will do this by creating a new variable called repair and recoding the values of rep78. I ask because my first line of command did not work. Module to replace specific characters or strings in variable names.
For some reason, yes is coded as 1 and no is coded as 2 instead of 0. The following resources provide variable definitions and other documentation related to reporting and using seer and related datasets. Stata module to rename value labels to match variable names for each variable a new value label becomes generated which. Values that do not meet any of the conditions of the rules are left unchanged, unless an otherwise rule is.
I dont know which variables are yesno type and i dont want to check and type out the name of all of these variables. In this article youll learn how to create new variables and change existing variables. Browse other questions tagged stata recode or ask your own question. The above command is just one way to recode missing values. Stata assumes that variable names are the first row of data in text files, so no. We can replace certain specific values, or ranges, like 519 or 28752. An easier way to do both examples is to use a loops and let stata create those 10 frequency tables, or recode all 98 and 99s to missing. To do this, we will create a function and then apply it to that variable to recode all values that are city to town. Also seed rename group for renaming groups of variables. However, we want the values to reflect the variable name, i. A stata variable name can contain up to 32 characters in any version of stata. The usual way to get data is to download a file, import it into stata, and save. Here we use the generate command to create a new variable representing population younger than 18 years old.
The instructions below will show you how to recode variables. This video covers everything youll need for hw3, including how to call data into stata, add labels to variables, recode variables, and create tablesgraphs. I came from stata and now i am trying to learn excel. I want to report a bug that i faced when downloading a rwritten. The stata commands covered include generate, replace, recode, label define, label values, label variable, and. Any string in var that does not meet the conditions of rules is set to missing in created numeric variables and copied from var in created string variables. Add variables together in spss using the compute procedure using manual add procedure duration. In stata i would have run a for cycle using the 27 datasets. How to recode a string variable statalist the stata forum. Systemmissing values and ranges cannot be selected for string variables because neither concept applies to string variables. I am currently struggling to understand how to recode a variable. Save descriptive attributes of variables to a dofile andor a stata dataset. How to see explanations of r codes in rstudio how to import an rds file recoding variables creating a variable of age groups creating a new political orientation variable creating a new social class variable renaming variables computing variables removing variables saving your dataset again how to import other formats of datasets lab 4. This post demonstrates how to create new variables, recode existing variables and label variables and values of variables.
If the rename option is specified see below, then any variable names specified by the list option must be. For example, you might want to convert a continuous reading score that ranges from 0 to 100 into 3 groups say low, medium and high. That is, the changes do not overwrite the original variable. The command will not rename any variable unless all of the resulting new names. View variable names, labels, storage types, formats, and value labels in a. The recode command replaces different values on one variable to some other variable. First, we omitted the parentheses around the rules. Thus, one alternative would be to work on a countrybasis with 27 separated code chunks, one for each df. Stata faq there may be times that you would like to convert a continuous variable into groups. Rename variables changes the names of variables in the active dataset while preserving their original order, values, variable labels, value labels, missing values, and print and write formats basic specification. About recode values when you create a question, a recode value and a variable name are automatically assigned to each answer choice. Using loops to generate and recode variables statalist. You cannot recode numeric and string variables together.
Value labels will be defined for numeric variables. In particular, i have to recode a set of 15 variables, these are integers ranging from 0 to 10 that includes spss typical. How do i recode a race variable keeping the same v. If you are new to stata we strongly recommend reading all the articles in the stata basics section. Your name required your email must be a valid email for us to receive the report. The easiest way is to use revalue or mapvalues from the plyr package. Instead, we use replace to convert 99 to for string variables. Lets for example look at freedom houses categorization of the countries of the world as free, partly free and not free. How to recode ordinal and nominal variables in spss. The left column lists all of the variables in your dataset.
This article is part of the stata for students series. Typing in data, changing variable names, adding labels, and adding values. Ive found very few useful examples on the internet that give a onesizefitsall solution to recoding and im interested to see what you guys and gals are using. Stata module to rename value labels to match variable.
To recode variables in stata, use the recode command. The recode into different variables window will appear. Stata color coding system from spsssas to stata example of a dataset in excel from excel to stata copyandpaste. I used tabulate stratumname, nolabel to find what stata stores them as so i can manipulate them. The basic specification is an old variable name, an equals sign, and the new variable name. Icf, 530 gaither road, suite 500, rockville, md 20850 tel.
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