y_dm.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

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{help contents:Top}
{bind:> {bf:Data management}}
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{title:Category listings}

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{bf:{help y_inputing:Inputting data}}{break}
    inputting data from the keyboard, from a file, or from a spreadsheet

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{bf:{help y_editing:Editing data}}{break}
    using the data editor

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{bf:{help y_creating:Creating and changing variables}}{break}
    {cmd:generate}{space 1}{it:newvar} {cmd:=} ...{space 2}and{space 2}
    {cmd:replace} {it:oldvar} {cmd:=} ...{break}
    also recoding, smoothing, renaming, dropping, ... variables

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{bf:{help y_dmsaving:Saving and reusing data}}{break}
    in both Stata and non-Stata (export) format

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{bf:{help y_reorg:Data reorganization}}{break}
    sort, stack, reshape, make dataset of means or other summary statistics, ...

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{bf:{help y_merge:Merging and appending datasets}}{break}
    two datasets combined into one, either by tacking on new observations
    (appending) or by tacking on new variables (merging)

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{bf:{help y_dutil:Utilities}}{break}
    describing, comparing, ...

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