= Stata Contract =

The '''`contract`''' command creates a dataset of descriptive statistics.

<<TableOfContents>>

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== Usage ==

Given a dataset like:

||'''id'''||'''foo'''||'''bar'''||'''baz'''||
||1       ||0        ||0        ||10       ||
||2       ||1        ||0        ||20       ||
||3       ||0        ||0        ||10       ||
||4       ||1        ||0        ||20       ||
||5       ||0        ||1        ||10       ||
||6       ||1        ||1        ||20       ||
||7       ||0        ||1        ||10       ||
||8       ||1        ||1        ||20       ||

Running `contract foo bar` would create a dataset like:

||'''foo'''||'''bar'''||'''_freq'''||
||0        ||0        ||2          ||
||0        ||1        ||2          ||
||1        ||0        ||2          ||
||1        ||1        ||2          ||

To rename the frequency variable, try the '''`freq(varname)`''' option.

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== Statistics ==

The `contract` command can compute additional descriptive statistics using these option:

 * '''`cfreq(varname)`''' creates a cumulative frequency, increasing over rows
 * '''`percent(varname)`''' creates a percentage for each row
 * '''`cpercent(varname)`''' creates a cumulative percentage, increasing over rows

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== See also ==

[[https://www.stata.com/manuals/dcontract.pdf|Stata manual for contract]]



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