How can I capture the first and last non-missing value of a variable by id?
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Logical expressions
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Missing values in SPSS
SPSS - Remove Missing Values - YouTube
SPSS FILTER Tutorial - Exclude Cases from Analyses
Missing Values in SPSS - The Ultimate Beginners Guide
Chapter 6 Wrangling Rows in R with Filter | Reproducible Medical Research with R
Logical expressions
Using an @NULL multiple Derive to explore missing data | IBM SPSS Modeler Cookbook
Coding Missing Values in SPSS - YouTube
Select Cases - SPSS (part 1) - YouTube
Management of missing values in continuous variables from SPSS data · Issue #596 · jamovi/jamovi · GitHub
Select cases dialog box | Data Analysis with IBM SPSS Statistics
SPSS Basics | Barnard College
Features - Data Setup in SPSS Statistics | Laerd Statistics
SPSS FILTER Tutorial - Exclude Cases from Analyses
SPSS Missing Values - Overview | IBM
How to Select Cases in SPSS - Easy SPSS Tutorial
