How do I use table lookup in SAS?
7 Table lookup techniques for SAS Programmers
- DATA Step Merges and SQL Joins. MERGE Statement. SQL Join.
- Merge Using Double SET Statements.
- Using Formats.
- Using Indexes.
- Using array lookup.
- Using the HASH Object.
What is table lookup in SAS?
Table lookup is the technique you use to acquire additional information from an auxiliary source to supplement or replace information being processed in your SAS data set.
What is lookup transformation in SAS?
You can create a job that uses the Lookup transformation, which loads fact data from a source table and uses a lookup process to load foreign keys from the dimension table. The lookup process compares the business key in each source row to the business keys in the dimension table.
How do I view a lookup table?
Open a table in Design View. Click the lookup field’s name in the Field Name column. Under Field Properties, click the Lookup tab.
How do you transform data in SAS?
To transform data in SAS, read in the original data, then create a new variable with the appropriate function. This example shows how to create two new variables, square-root transformed and log transformed, of the mudminnow data.
How do I transform a variable in SAS?
You can choose from the following simple transformations in the Transform Variables node:
- Log — Variable is transformed by taking the natural log of the variable.
- Square Root — Variable is transformed by taking the square root of the variable.
- Inverse — Variable is transformed by using the inverse of the variable.
What is a lookup table in access?
A lookup table is a table that contains data that is referenced by another table. In Access, the lookup field displays the data as a drop down list (or combo box) so that the user can select the desired value from the list. The values of the lookup field come directly from the lookup table.
What is lookup table with example?
In data analysis applications, such as image processing, a lookup table (LUT) is used to transform the input data into a more desirable output format. For example, a grayscale picture of the planet Saturn will be transformed into a color image to emphasize the differences in its rings.
What is square root in SAS?
The SQRT function returns the positive square roots of each element of the argument matrix.
How do I create a dummy variable in SAS Enterprise Miner?
To generate the dummy variables, put the names of the categorical variables on the CLASS and MODEL statements. You can use the OUTDESIGN= option to write the dummy variables (and, optionally, the original variables) to a SAS data set.
What is variable transformation in data mining?
Variable transformation is a way to make the data work better in your model. It is also called encoding, or in text mining, embedding is also meant to handle similar situation but embedding is usually suppose to return numeric values containing semantics of original data.
