Data transposition with proc report midwest sas users group. Statements with the same function in multiple procedures. Sep 21, 2014 r use r and sas to reshape the data format. The ability to effectively transpose a data set is very important when working with different data structures and different data standards. After the procedure, all of the info from each patient were listed in one single row.
Dont understand your input data, and that end up in your proc transpose but anyway, as anca said, you need to take care of the date somehow, make it sas dates, so you could use sas functionsformats to do some smart date manipulations. For more information, see statements with the same function in multiple procedures. By default, sas date and time variables are printed using the sas internal values, rather than a humanreadable date format. The proc transpose can save time and complexity once it is properly explained. To print the output data set from the proc transpose step, use proc print, proc report, or another sas reporting tool. This tutorial explains the basic and intermediate applications of proc transpose with examples. Do you often need to transpose your data sets from long multiple rows per subject to wide multiple columns per subject.
How to keep multiple formats in one variable after transpose mindy wang abstract in clinical trials and many other research fields, proc transpose are used very often. Character data non numeric data values such as letters, numbers, special characters, and blanks. For example, you have data in vertical long format and you are asked to change it to horizontal wide format. Sas functions byten returns one character in the ascii or ebcdic collating sequence where n is an integer representing a specific ascii or ebcdic character.
Do not use proc transpose with a by statement or an id statement if another user is updating the data set at the same time. If you have a dynamic no of rows and columns, then the ideal way will be to use open function, get the no of columns to a macro. Its a very powerful procedure when you need to change the shape of the data. Sometimes you need to reshape your data which is in a long format shown below famid year faminc 1 96 40000 1 97 40500 1 98 4 2 96 45000 2 97 45400 2 98 45800 3 96 75000 3 97 76000 3 98 77000. See chapter 2, fundamental concepts for using base sas procedures, for a list.
Further, the output data set can be used in subsequent data. As you can see, the patients info were listed in multiple rows prior to running the proc transpose procedure. Dec 18, 2012 this video is about proc transpose step in sas. The out keyword says that the transposed dataset should be created as a new dataset called newdatasetname. There is a summary sheet at the end of the paper as well for later reference. Data step and proc transpose are the two most common methods. Looks and feels almost exactly like proc transpose doesnt have all of the capabilities of proc transpose as it was designed for just one purpose. Further, the output data set can be used in subsequent data or proc steps for analysis, reporting, or further data manipulation. The transpose procedure can transpose variables and observations, or transpose variables and observations within by groups. First step, it is required to sort the variables id time before using them in by statement in proc transpose. The transpose procedure creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. Proc transpose was designed to either make a long file wide, or a wide file long.
This section discusses some applications of the transpose procedure relevant to time series data sets. Creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. It is very helpful when needing to shift data from rows to columns or vice versa. It contains three sample sas input files, a set of basic proc transpose variations, and their output results. This blog post shows how to numerically integrate a onedimensional function by using the quad subroutine in sasiml software. See chapter 3, statements with the same function in multiple procedures, for details. Proc transpose free sas tutorials sascrunch training. The table lists defaults for the most commonly used ods destinations. To print the output data set from the proc transpose step, use proc.
If youre in sas, use proc transpose for this option. The name quad is short for quadrature, which means numerical integration. That is, either put all of the variables on one record for each by variable, or create one record for every. Contains the complete reference for all base sas procedures. In the first transpose of the above code, we are telling sas to store information of all the variables in a single variable and the respective values in the another variable. From the first output of proc print, we see that the data now is in long format except that we dont have a numeric variable indicating year. We answer comments there and offer direct subscriptions if you like.
The transpose procedure can often eliminate the need to write a lengthy data step to achieve the same result. With sas, data transposition can be carried out in more than one way. This is especially true when you have to untranspose a wide. See the bysorted system option in sas system options. However, dates can be displayed using any chosen format by setting the format in a data step or proc step.
I have a question about transposing data without using proc transpose. Besides these two, this paper also introduces a third way, proc. Transposing multiple variables in a sas data set within a single macro call. You can use the label, attrib, format, and where statements. Refer to the sas procedures guide for more information on proc transpose.
This paper will provide a non technical approach to understanding the transpose procedure by showing the programmer how to visualize the expected output. Proc transpose transposes only the numeric variables, test1, test2, and final, because no var statement appears. Because the copy statement copies variables directly to the output data set, the number of observations in the output data set is equal to the number of observations in the input data set. Sas interview questions and answers pdf for experienced freshers.
Sas transpose without using proc transpose stack overflow. Sas data set terminology variables columns in a sas data set. The proc transpose statement tells sas to execute the transpose procedure on an existing dataset called datasetname. You can find multiple examples in the sashelp library to help illustrate what a long dataset looks like.
Base sas, macros, routines, functions, sas data integration studio, sas in mainframes, sas webreport studio, sas enterprise guide, all sas functions sas statistical analysis system. You can use the attrib, format, label, and where statements. The sas has created this credential to assess the knowledge and understanding of a candidate in the area as above via the certification exam. Proc transpose is an extremely powerful tool for making long files wide, and wide files less wide or long, but getting it to do what you need often involves a lot of time, effort, and a substantial knowledge of sas functions and data step processing. Transposing data using proc transpose search this guide search. Proc sql a primer for sas programmers jimmy defoor citi card irving, texas the structured query language sql has a very different syntax and, often, a very different method of creating the desired results than the sas data step and the sas procedures. Only a very thorough manual, such as the sas guide to the. When many variables with their individual formats are transposed into one variable, we lose the formats. If you read this on an aggregator that does not credit the blogs it incorporates, please come visit us at sas and r. Upon starting i realised why they had been having trouble, the proc transpose function of sas is closer to an alteryx cross tab than transpose, but in actual fact to reproduce the results exactly alteryx needs a transpose and cross tab tool. Heres an example, including creating a view as noted in the comments. For a list, see dictionary of sas global statements in sas global statements. I decided i would recreate the lessons from this document using alteryx.
The procedure pads the output data set with missing values if the number of observations in the input data set and the number of variables it transposes are. How to keep multiple formats in one variable after transpose. To create transposed variable, the procedure transposes the values of an observation in the input data set into values of a variable in the output data set. Use ods styles with proc print using styles with base sas procedures. Hi thomas, an often posed question and discussed subject on sasl. The proc transpose is part of the sas language that does not get used as much as it should. Sas and r is aggregated by rbloggers, procx, and statsblogs with our permission, and by at least 2 other aggregating services which have never contacted us. This sas software tutorial shows how to use proc transpose to transpose a datasets rows and columns, and discusses when to use a transpose. Selects observations from a sas data set that meet certain conditions before sas brings them into the data or proc step for processing. For more information, see statements with the same function in multiple. Proc transpose provides the ability to go from a long dataset where there are multiple rows for a given subject to a wide dataset where there are multiple columns for a subject. It is very help ful when needing to shift data from rows to columns or vice versa. If you specify statistics in the proc summary statement and the var statement is omitted or if a numeric variable is not associated with a statistic in the output.
Each destination has a default style template that is applied to all output that is written to the destination. Aug 22, 20 dont understand your input data, and that end up in your proc transpose but anyway, as anca said, you need to take care of the date somehow, make it sas dates, so you could use sas functionsformats to do some smart date manipulations. You can use the quad subroutine to numerically find the definite integral of a function on a finite, semiinfinite, or. Apr 06, 2020 contains the complete reference for all base sas procedures.
We need to reshape the data into a format that shows horizontally so that we can use sas arrays to manipulate the data file and create a new subset. Base sas, macros, routines, functions, sas data integration studio, sas in mainframes, sas webreport studio, sas enterprise guide, all sas functions sas statistical analysis system search web. How to numerically integrate a function in sas the do loop. Meaning of proc transpose is a powerful data manipulation tool in base sas. For more information, see indatabase processing for proc transpose. Numeric data values that are treated as numeric and may include 8 bytes of floating storage for 16 to 17 significant digits. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose. This function if achieved in a data step can be much more cumbersome to code.
Proc transpose is one of the most common ways to reshape data in sas because once you understand the options, it. Data transposition with proc report lingqun liu the university of michigan, ann arbor abstract transposition is a very common data manipulation task. This paper presents an easy beforeandafter approach to learning proc transpose. There is no particularly good way to do this in proc sql. You cannot use proc transpose with an id statement or a by statement with an engine that supports concurrent access if another user is updating the data set at the same time. The sas base programming a00231 certification exam contains a high value in the market being the brand value of the sas attached with it. If however two or more variables need to be transposed, you need to transpose each variable separately and then merge the transposed data sets, which can be time consuming. The proc transpose statement tells sas to execute the transpose procedure on an. Below is an example of using sas proc transpose to reshape the data from a long to a wide format.
How to reshape data long to wide using proc transpose. Proc transpose is a powerful yet underutilized proc in the base sas toolset. Provides information about what each procedure does and, if relevant, the kind of output that it produces. The by statement is used to determine the row structure of the transposed dataset.
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