Reshape matrix to have specified number of columns. The other useful option is string which tells stata that the the variable specified in j is a string variable. This module may be installed from within stata by typing ssc install reshape3. You also must determine the logical observation i and the subobservation j by which to organize the data. This entry describes this manual and what has changed since stata 12. Data transformation reshape data manipulate strings with. An example of reshape long with stata1 stata has reshape long. The stata reshape command apparently relies on this naming. The main stata interface is composed of five windows, listed clockwise from the center.
Panel data refers to data that follows a cross section over timefor example, a sample of individuals surveyed repeatedly for a number of years or data for all 50 states for all census years. Use the name of the program as a command as you use other default stata commands. This module illustrates the power and simplicity of stata in its ability to reshape data files. How can i reshape without a unique j variable in stata. Reed college stata help reshaping your data in stata. Longitudinal data analysis using stata statistical horizons. In stata, this method can be implemented with most regression commands using the vce option. Reshaping data wide to long stata learning modules.
Stata module to enhance reshape for multilevel data. Description of basic syntax before using reshape, you need to determine whether the data are in long or wide form. Converting data from wide to long format using excel hindiurdu duration. Reshape data between wide format and long format generate summary statistics copy information from one row to another e. Title reshape convert data from wide to long form and vice versa syntax menu description options remarks and examples stored results acknowledgment references also see syntax overview long wide i j stub i stub stub 1 1 4. You can use the reshape command to jump between long format. Reshaping data from wide to long university of virginia. Convert data back to long form after using reshape wide reshape long. Because stata reads in the whole data set at the same time, stata has special commands to construct variables for data in long format. How to use stata to create and manage longformat data. Since we need to convert the data from a wide format to a long format, this is why the command that we wrote was reshape long. Openingsaving a stata datafile quick way of finding variables subsetting using conditional if stata color coding system from spsssas to stata example of a dataset in excel from excel to stata copyandpaste. Although the names are logical and clear, reshape can do nothing with such a variable set until these variables are renamed to a stub plus suffix form.
Reshape a 4by4 square matrix into a matrix that has 2 columns. Baum department of economics boston college chestnut hill, ma 02467. The tutorial starts with an excel spreadsheet sampledata. Specify for the first dimension to let reshape automatically. Extracting and reshaping world fertility survey data in stata. Suppose that you had the following data, which could be organized in wide or long form as. Stata offers the reshape command for restructuring data.
After that, we have to specify the names of the variables which are in the wide format. Note that another column has been added to show the year. In the above code, long tells stata that you want to restructure data from wide format to long format. Lambert centre for biostatistics and genetic epidemiology department of health sciences university of leicester leicester, uk paul. When working with data in long format, be sure that there are no duplicate records per family or individual and that data are sorted correctly. Stata module to enhance reshape for multilevel data, statistical software components s458437, boston college department of economics. These show common examples of reshaping data but do not exhaustively demonstrate the different kinds of data reshaping that you could encounter. Most questions about its use can be answered from a careful reading of the manual entry at d reshape, but some further notes and examples are added here for the specific problem of reshaping e. These show common examples of reshaping data, but do not exhaustively demonstrate the different kinds of data reshaping that. The reshape command can be used to reshape from wide to long or long to wide. The equivalent in the tidyverse would be the gather wide to long and spread long to wide.
How to reshape data in stata step 1 copy and paste data from csv to data editor in stata when copying data from csv to stata, make sure the var names are text. Secondlevel nesting description of advanced syntax seemitchell2010, chap. If youve used stata you might be familiar with its reshape command. To reshape a wide data set long, you have to specify reshape long. After that you specify the word kernel that the multiple columns we want to reshape have in common. Introduction to stata cosimo beverelli world radet. These show common examples of reshaping data, but do not exhaustively demonstrate the different kinds of data reshaping that you could encounter.
For instance, logit or logistic model in stata prefers a wide. In addition, we are often interested in combining multiple. Like many other powerful commands, it can seem rather complicated until you have experience with it. These show common examples of reshaping data but do not exhaustively demonstrate the different kinds of data reshaping that you. Reshaping data long to wide stata learning modules. The text weight calories indicates the variables to be converted, and iid tells stata that id is. There is an r function called reshape from the stats package that does the same thing, just not within the tidyverse framework. Codebooks are like maps to help you figure out the structure of the data. Data transformation reshape data cheat sheet get string. How to use the stata merge and reshape commands most of the projects done in 17. Most commands work the same in stata versions 12, 11, 10, and 9. Stata getting started tutorial department of statistics the. The issue is that i have two variables, but they arent both in the wide format. These examples take wide data files and reshape them into long form.
Using stata on longformat data bowling green state. Data preparationdescriptive statistics princeton university. Convert data from wide to long or vice versa two forms of data. Reshape wideform id sex inc80 inc81 inc82 1 0 5000 5500 6000 2 1 2000 2200 3300 3 0 3000 2000 longform id year sex inc 1 80 0 5000 1 81 0 5500 1 82 0 6000. In addition, we are often interested in combining multiple observations. Hello everybody, i need to reshape wide data to long. Here we suppose that jan through dec are stored in that order in your dataset. An example of reshape long with stata1 stata has reshape long and reshape wide commands that make it pretty easy to modify files from wide to long, and back. Stata has reshape long and reshape wide commands that make it pretty.
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