Review
SAS windows
-. Program editor, Log, Output windows and Exploring window by default.
-. Program window is a notepad you can write the code in it.
-. Log window shows the processing results when running the code.
-. Output window is the window containing all the output for your commands.
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SAS windows
-. You can check your windows
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Understanding library
-. Library is a function to connect the external files to SAS.
-. Library has two types
-. Without assigning any library, ‘Work’ (temporary) library is default.
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Set up a library
-. If you want to save SAS files, you need to create your own library.
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Set-up library
-. You can put the library name in the blank on the first row (1), and then choose the
physical location by clicking “search” (2), then click “OK” (3).
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Data importing
-. If you have to use external files such as excel, csv, and txt file, you have to import
them to SAS at first by clicking “Import”.
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Data importing
-. Next, you will see the wizard. After choosing the data type, and click “Next”.
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Data importing
-. Then, choose the file you will import by clicking “Browse”.
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Data importing
-. Before your click the “next” button, choose ‘option’ right.
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Data importing
-. Then, choose the library you will put your imported data in.
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Data importing
-. Then put the (SAS) file name in the blank after “Member”.
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Data importing
-. Then click “Finish” button.
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Practice
-. Create the library called ‘bids204’.
-. Go to blackboard, and download ‘ex1.csv’ file and import it to the ‘bids204’
with a file name of ‘ex1’.
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Practice
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Basic commands
-. We can delete or select some variables.
DATA EX1;
SET BIDS.EX1;
KEEP VAR1 VAR3;
DROP VAR2 VAR4;
RUN;
-. KEEP commands: the variables are selected in the new dataset
-. DROP commands: the variables are dropped in the new dataset
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Editing dataset
-. We can rename the variable.
DATA EX1;
SET BIDS.EX1;
RENAME OLDNAME = NEWNAME;
RUN;
-. RENAME commands: OLDNAME is renamed to NEWNAME
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Editing dataset
-. We can create a new variable.
DATA EX1;
SET BIDS.EX1;
varNAME = VAR1 +VAR2;
RUN;
-. varNAME is newly created by summing the existing two variables,
VAR1, VAR2
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Sorting dataset
-. Data can be sorted in ascending or descending order.
PROC SORT DATA=BIDS.EX1;
BY (DESCENDING) VAR1;
RUN;
-. BY commands: data set is sorted by the variable after BY.
-. Without DESCENDING option, the data set is sorted in ascending order.
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Homework1
Write your SAS codes and upload the code file to Blackboard.
-. (1) Select Name, Sex, Age, Height and Weight from ex1 dataset.
-. (2) Change the variable name of ‘Sex’ to ‘Gender’.
-. (3) Sort the dataset by ‘Age’ in ascending order and save the sorted dataset
to ‘exercise1’.
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