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= Metadata = = Stata Metadata =
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Data about data. Stata exposes a rich API for querying internal '''metadata'''.

<<TableOfContents>>
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== Labeling ==
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=== Variable Labels === == Labels ==

Variable and value labels are defined using the '''`label`''' command.
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label variable VAR "var" label variable foo "yes or no?"
label define yesno 1 "Yes" 0 "No"
label values foo yesno
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See [[Stata/Label|here]] for more options.
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=== Value Labels ===

Value labels are defined separately from the actual dataset.		 Numeric values can be quickly prepended to value labels using the '''`numlabel`''' command.
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label define LABEL 0 "No" 1 "Yes"
label define LABEL 99 "Missing", modify
label values VAR LABEL
}}}

By default, labels cannot be overwritten. The '''add''' option allows new values to be inserted into an existing label. The '''replace''' option allows existing values to be overwritten in an existing label. The '''modify''' option combines both.

Numeric values can be added to value labels using the '''numlabel''' command.

{{{
numlabel LABEL, add mask("#. ")		 numlabel foo, add mask("#. ")
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== Quick Tips ==

Stata has a number of interactive tools for examining metadata.		 == Descriptives ==
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di _N // number of cases
di c(k) // number of variables		 display _N // number of cases
display c(k) // number of variables

Stata Metadata

Stata exposes a rich API for querying internal metadata.

Contents

  1. Stata Metadata
    1. Labels
    2. Descriptives

Labels

Variable and value labels are defined using the label command. 

label variable foo "yes or no?"
label define yesno 1 "Yes" 0 "No"
label values foo yesno

See here for more options.

Numeric values can be quickly prepended to value labels using the numlabel command. 

numlabel foo, add mask("#. ")

Descriptives

display _N    // number of cases
display c(k)  // number of variables

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Stata/Metadata (last edited 2023-06-07 18:54:07 by DominicRicottone)