help quietly, help noisily
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Title

    [P] quietly -- Quietly and noisily perform Stata command


Syntax

    Perform command but suppress terminal output

        quietly [:] command


    Perform command and ensure terminal output

        noisily [:] command


    Specify type of output to display

        set output { proc | inform | error }


Description

    quietly suppresses all terminal output for the duration of command.  It is useful both interactively and in
    programs.

    noisily turns back on terminal output, if appropriate, for the duration of command.  It is useful only in
    programs.

    set output specifies the output to be displayed.  It is useful only in programs and even then is seldom used.


Example of interactive use

    You do not care to see the output from a particular regression, but instead want to silently run the
    regression so that you may access some of its returned results.

        . sysuse auto
        . quietly regress mpg weight foreign headroom

    No output is presented, but the e() returned results from the regression are now available.

结果不显示有屏幕上

不显示 的意思 一起学习！加油

quietly,悄悄的处理，结果不显示

快速回归，不显示结果，但是mom中保留数据以供后续命令使用