Proc transpose rearranges columns and rows of sas datasets, but its documentation and behavior can be difficult to comprehend. How to reshape data wide to long using proc transpose. I have a pdf i bought online and it is very clear but in the wrong key for alto. How to reshape data long to wide using proc transpose. Its a sas macro 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. When i transpose this dataset it creates a dataset with 2. Li, city of hope comprehensive cancer center, duarte, ca abstract you can store data with repeated measures for each subject, either with repeated measures in columns one observation per subject or with repeated measures in rows multiple observations per subject. The transpose procedure can often eliminate the need to write a lengthy data step to achieve the same result. Proc transpose transposes only the numeric variables, test1, test2, and final, because no var statement appears and none of the numeric variables appear in another statement. Proc transpose needs prior sorting but will create the necessary number of columns to.
Base sas, macros, routines, functions, sas data integration studio, sas in mainframes, sas webreport studio, sas enterprise guide, proc compare sas statistical analysis system search web. Thus, when the first character of the formatted value is numeric, the procedure prefixes an underscore to the value, truncating the last character of an 32character value. Arthur tabachneck a better way to flip transpose a sas dataset. Overview to transpose your data turning variables into observations or turning observations into variables, you can use either proc transpose or array processing within a data step. Having said all this, why would you want to reinvent the wheel when you already have the sas provided ready made transpose function. When you use a numeric variable as an id variable, proc transpose changes the formatted id value into a valid sas name. There is a summary sheet at the end of the paper as well for later reference. Proc transpose vs arrays vs proc summary mike zdeb, university at albany school of public health, rensselaer, ny abstract when data for the same entity person, place, thing are stored across multiple observations, it is a common task to place all the data for a given entity into a single observation. United states steel corporation rows of the original data matrix become columns, and columns become rows. Hi thomas, an often posed question and discussed subject on sas l. 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. How to transpose a sas data set by using arrays and proc transpose. Using ods styles with proc tabulate using styles with base sas procedures. The by statement is used to determine the row structure of the transposed dataset.
Simplifying effective data transformation via proc transpose arthur x. When many variables with their individual formats are transposed into one variable, we lose the formats. A novel approach using hash objects continued other clinical study examples. The proc transpose statement tells sas to execute the transpose procedure on an existing dataset called datasetname. If you do not use the notsorted option in the by statement, the observations must be either sorted by all the variables that you specify, or they must be indexed appropriately. How to keep multiple formats in one variable after transpose. I want to open the pdf in something and be able to automatically transpose it. Collinsworth1,3 1 institute for health care research and improvement, baylor health care system 2 university of north texas school of public health 3 tulane university abstract grad students learn the basics of sas programming in class or on their own.
Instead, for each by group, proc transpose creates one observation for each variable that it transposes. This paper presents an easy beforeandafter approach to learning proc transpose. First off, you could use a keep statement in the output. Proc transpose is a powerful data manipulation tool in base sas. This is a slightly different situation than seen in table 4. A transposed variable is a variable the procedure creates by transposing the values of an observation in the input data set into values of a variable in the output data set. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose. Shoes is the original input dataset specified using data and work. Opposite of proc transpose sas support communities. 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. I guess a datastep will always be more efficient then proc transpose on big data. Dec 18, 2012 this video is about proc transpose step in sas.
In sas, i have a data set similar to the one below. It contains three sample sas input files, a set of basic proc transpose variations, and their output results. Data transposition with proc report midwest sas users group. Like other destinations, the pdf destination automatically generates link names with the following naming convention. Each destination has a default style template that is applied to all output that is written to the destination. Transposing data using proc transpose this sas software tutorial shows how to use proc transpose to transpose a datasets rows and columns, and discusses when to use a transpose. I am not sure if transpose is the right concept here. Using reshape2 for transposing datasets in r decision stats. 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. This creates a need for wellorganized reports that are easily navigated by means such as table of contents, hyperlinks, and bookmarks rather than relying on the. Using sas colon effectively, continued 2 in sas, character strings must be adjusted to the same length before they can be compared. Below is an example of using sas proc transpose to reshape the data from a long to a wide format. Contains the complete reference for all base sas procedures.
Table 5 is still a transpose of table 3, but it involves a transpose in two parts once to transpose var1 and once again for var2. The ability to effectively transpose a data set is very important when working with different data structures and different data standards. It contains three sample sas input files, a set of basic. For common input files, this paper will show a variety of desired output files, plus code and explanations. Hello, i was wondering when doing a proc transpose, i want to keep one variable just as it was. Transposing multiple variables in a sas data set within a single macro call. Nov 06, 2010 note problem statementthis is quite similar to using proc transpose using values in sas. Many programmers resort to use of the data step to. Sas transpose without using proc transpose stack overflow. The table lists defaults for the most commonly used ods destinations. This must happen before the actual transpose method. First, lets see what happens when you use proc transpose on sashelp. The full macro version, %long2wide, is based on the above algorithm but provides variable lengths and types as macro parameters, and also uses logic to detect variable types in order to automatically choose between getvarc. Naming transposed variables when the id variable has duplicate values.
For all base procedure documentation, see base sas procedures guide. The transpose procedure can transpose variables and observations, or transpose variables and observations within by groups. When sas compares character strings without the colon modifier, it pads the shorter string with blanks to the length of the longer string before making the comparison. So by putting at least one example of every possible date in the first by group and in the right order then it. Tailoring site content creates the best experience possible for each visitor, resulting in more traffic and conversions. Taming the proc transpose matt taylor, carolina analytical consulting, llc abstract the proc transpose is often misunderstood and seldom used. See, those links are exactly what i was talking about when i was saying that all of my searches werent demonstrating what i wanted to do. I think thats the overhead of proc transpose it first finds out the values. If youd like to download the sample dataset to work through the examples, choose one of the files below. My proc transpose is not turning out the way i need it to. 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. How to create an embedded hyperlink in a sas data step.
Data transposition with proc report lingqun liu the university of michigan, ann arbor abstract transposition is a very common data manipulation task. It doesnt works as required for multiple values of. Transposing one group of variables for a data set in wide format such as the one below, we can reshape it into long format using proc transpose. For example, if you are transposing from a to c, use the a row row 1 to identify the chord, and then go down to the c row row 4 to find the transposed chord. Id prod1 prod2 prod3 1 a b c 2 d e f and i want to turn into this. Using it, one can switch the significance of row and column identifiers, either globally or selectively within bygroups. Proc transpose can be used to rotate transpose sas data sets. Besides these two, this paper also introduces a third way, proc. The transpose procedure creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. It may not be efficient when you have to deal with several variables and the desired.
These types of modifications can include changing a variables type from numeric to string or vice versa, merging the categories of a nominal or ordinal variable, dichotomizing a continuous variable at a cut point, or computing a new summary variable from existing variables. However, sas variable names cannot begin with a number. Proc transpose transposes only the numeric variables, test1, test2, and final, because no var statement appears. Proc transpose is one of the most common ways to reshape data in sas because once you understand the options, it. Refer to the sas procedures guide for more information on proc transpose. The correct bibliographic citation for this manual is as follows. Not only does transpose unlock hidden visitor data on our site, but it makes that data actionable. An alternative method of transposing multiple variable for report generation li luo, wyeth pharmaceuticals, collegeville, pa abstract while the proc transpose procedure may be flexible enough to generate a variety of report formats. Id newcolumnname newcolumnname2 1 prod1 a 1 prod2 b 1 prod3 c 2 prod1 d 2 prod2 e.
This section discusses some applications of the transpose procedure relevant to time series data sets. How to reshape data wide to long using proc transpose sas. Post this you can read it in to an array and using the macro variables as the dimensions output the values in to the new dataset. Data step and proc transpose are the two most common methods. 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. Proc transpose transposes the observation that contains the last occurrence of a particular id value within the data set or by group.
Sep 21, 2014 r use r and sas to reshape the data format. Proc transpose is a powerful yet underutilized proc in the base sas toolset. If you have sas viya with any offering in addition to sas visual analytics licensed and installed, you also have access to all sas 9. Proc transpose variations, and their output results. 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. 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.
To generate a link in pdf, use the same mechanism as that used in html. If youwant to transpose a character variable, a var statement is required. Louis, missouri abstract proc transpose is a powerful yet underutilized proc in the base sas toolset. The sas code to convert table 3 into table 5 beginning with proc transpose is definitely becoming more cumbersome. As of 2019, why do mountaineering courses still teach how to use a. You can find multiple examples in the sashelp library to help illustrate what a long dataset looks like. Var transpose column it lists the actual data that needs to be transposed. How to convert pdf to word without software duration. Using sas ods pdf features to organize, link, and navigate a.
How to limit number of transposed variables in proc transpose sas. I did a groupby in a proc sql to get the data in a table that i needed but i am not getting my proc transpose to look right. Many sas programmers have flipped out when confronted with having to flip transpose a sas dataset, especially if they had to transpose multiple variables, needed transposed variables to be in a specific order, had a mixture of character and numeric variables to transpose, or if they needed to retain a number of nontransposed variables. With sas, data transposition can be carried out in more than one way. I need to transpose data from one row to one column. Simplifying effective data transformation via proc transpose. Transposing data using proc transpose sas tutorials. Proc contents output see output 5 below shows that the new lengths of the variables match the longest value from the raw data. Can anyone tell me the best way of doing the opposite of proc transpose. Proc transpose for multiple values kanhaiya gupta, tcs, fond du lac, wisconsin abstract proc transpose can be used to rotate transpose sas data sets. 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.
If youve ever had to rearrange a transposed sas dataset, converting it from being a wide dataset back to the long or less wide. Is there an efficient way of transposing huge table in sas. Meaning of proc transpose is a powerful data manipulation tool in base sas. Type is the by variable, and sold, notsold, repaired, and junked are the variables to transpose. A simple approach here is to transpose one group of variables at a time and then merge them back together.
If you do not include a var statement, the procedure will transpose all numeric variables that are not included in a by statement or a id statement. Transposing multiple variables in a sas data set within a single macro call this macro is useful when data need to be restructured from a multiplerowpersubject structure into a onerowpersubject structure. Sas proc transpose without needing to sort the data. An alternative method of transposing multiple variable for. Proc transpose russell lavery, independent consultant abstract if one can think about a sas data set as being made up of columns and rows one can say proc transpose flips the columns of data into rows of data and the reverse. Paper 0602009 learn the basics of proc transpose douglas zirbel, wells fargo and co. Further, the output data set can be used in subsequent data. Sas users are unsure of the results it will give and curious about syntax that is often not particularly intuitive. To print the output data set from the proc transpose step, use proc print, proc report, or another sas reporting tool. That is to say, it permits one to switch sas variables with logical record keys. Sugar daddy wants me to apply for a credit card so he can link me to his company account. Most of the time, youll need to make modifications to your variables before you can analyze your data. Proc transpose creates the columns as it sees new values of the id variable. This procedure transforms the data from rows to columns or from columns to rows.
1442 173 302 1003 1205 795 431 968 913 1105 1118 279 393 1303 1111 185 960 1134 245 660 1258 1055 1141 348 1087 887 105 737 333 1256 975 993 1201