help labvalcl
-------------------------------------------------------------------------------

Title

     labvalcl -- Clear value labels of null strings


Syntax

        labvalcl [lblname-list] [, null[("label")] numeric nodetach]


Description

    labvalcl removes null strings from value labels and detaches empty value
    labels from variables. Empty value labels are dropped from memory. If
    lblname-list is not specified it defaults to all value labels in memory.


Options

    null[("label")] additionally removes label from value labels in
        lblname-list. If label is not specified it defaults to "null".

    numeric additinally removes (integer) numbers from value labels if
        integers are used as labels for the integer values they are
        associated with. Thus "2" will be removed if it is associated with
        value 2.

    nodetach does not detach empty value labels from variables. This option
        is seldom used.


Example

    Setting

        . sysuse nlsw88
        . label define racelbl 4 "" ,modify
        . label define marlbl 0 "0" 1 "" ,modify
        . describe race married
        . label list racelbl marlbl
        

    Remove null strings, numeric to numeric mappings and detach and drop
    empty value labels

        . labvalcl racelbl marlbl ,numeric
        . describe race married
        . label list racelbl
        . label list marlbl


Author

    Daniel Klein, University of Bamberg, klein.daniel.81@gmail.com


Also see

    Online: label, labelbook_problems

    if installed: labdel, labdtch, labvalch, labeldup, strrec, labutil2