help cumul dialog: cumul
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Title
[R] cumul -- Cumulative distribution
Syntax
cumul varname [if] [in] [weight] , generate(newvar) [options]
options description
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Main
* generate(newvar) create variable newvar
freq use frequency units for cumulative
equal generate equal cumulatives for tied values
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* generate(newvar) is required.
by is allowed; see [D] by.
fweights and aweights are allowed; see weight.
Menu
Statistics > Summaries, tables, and tests > Distributional plots and
tests > Cumulative distribution graph
Description
cumul creates newvar, defined as the empirical cumulative distribution
function of varname.
Options
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----+ Main +-------------------------------------------------------------
generate(newvar) is required. It specifies the name of the new variable
to be created.
freq specifies that the cumulative be in frequency units; otherwise, it
is normalized so that newvar is 1 for the largest value of varname.
equal requests that observations with equal values in varname get the
same cumulative value in newvar.
Examples
To graph cumulative distribution:
. webuse hsng
. cumul faminc, gen(cum)
. line cum faminc, sort
To graph two cumulative distributions on the same graph:
. sysuse citytemp, clear
. cumul tempjan, gen(cjan)
. cumul tempjuly, gen(cjuly)
. stack cjan tempjan cjuly tempjuly, into(c temp) wide clear
. line cjan cjuly temp, sort
Also see
Manual: [R] cumul
Help: [R] diagnostic plots, [R] kdensity, [D] stack
