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How can I replace missing values with previous or following nonmissing values or within sequences? 1. The problems. Users often want to replace missing values by neighboring nonmissing values, particularly when observations occur in some definite order, often (but not always) a time order.
6 Δεκ 2014 · My dataset has missing values in more than 15 variables (they are newly generated variables) and I need to replace them by zeros. Is there any command I can use to just input zeros whenever value missing, without having to specify varlist?
25 Φεβ 2021 · Missing values in Stata are treated as very large positive values. See help missing for more info. In your case, you've written replace ind_inc="Increased" if pchange>1. When pchange is missing, it is a very large positive value, which is greater than one so ind_inc is replaced.
22 Σεπ 2023 · This column focuses on the easiest problems in which a researcher is clear, or at least highly confident, about what missing values should be instead, implying a deterministic replacement. The main tricks are copying values from observation to observation and using the ipolate command.
This module will explore missing data in Stata, focusing on numeric missing data. It will describe how to indicate missing data in your raw data files, as well as how missing data are handled in Stata logical commands and assignment statements.
We could force mvencode to encode the data with 1, anyway, by typing mvencode all, mv(1) override. That would be appropriate if the 1s in our data already represented missing data.
16 Νοε 2022 · How to convert numbers to missing values. Sometimes, missing data are stored as impossible values such as "age = -99". We may recognize these as missing data, but we need to tell Stata to treat them as missing values. Let's begin by opening, describing, and summarizing an example dataset from the Stata website.
