rotate.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

{smcl}
{* 06apr2005}{...}
help for {hi:rotate}{right:dialog:  {bf:{dialog rotate}}   }
{right:also see:  {helpb rotatemat}}
{hline}

{title:Title}

{p 4 26 2}
{hi:[MV] rotate} {hline 2} 
Orthogonal and oblique rotations after {helpb factor} and {helpb pca}


{title:Syntax} 

{p 8 15 2}
{cmdab:rot:ate} [{cmd:,} {it:options}]

{p 8 15 2}
{cmdab:rot:ate}{cmd:,} {opt clear}

{synoptset 20 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Main}
{synopt:{opt ortho:gonal}}restrict to orthogonal rotations; 
	default, except with {cmd:promax()}{p_end}
{synopt:{opt obliq:ue}}allow oblique rotations{p_end}
{synopt:{it:rotation_methods}}rotation criterion{p_end}
{synopt:{opt norm:alize}}rotate Horst normalized matrix{p_end}
{synopt:{opt h:orst}}synonym for {opt normalize}{p_end}
{synopt:{opt f:actors(#)}}rotate {it:#} factors or components;
	default all{p_end}
osynopt:{opt comp:onents(#)}}synonym for {cmd:factors()}{p_end}

{syntab:Reporting}
{synopt:{opt bl:anks(#)}}display loadings as blank when
	|loadings| < {it:#}; default is {cmd:blanks(0)}{p_end}
{synopt:{opt det:ail}}rarely specified; show {cmd:rotatemat} output{p_end}
{synopt:{opt for:mat(%fmt)}}display format for matrices;
	default is {cmd:format(%9.5f)}{p_end}
{synopt:{opt noload:ing}}suppress display of rotated loadings{p_end}
{synopt:{opt norota:tion}}suppress display of rotation matrix{p_end}

{syntab:Opt options}
{synopt:{it:optimize_options}}control
	the maximization process; seldom used{p_end}
{synoptline}

INCLUDE help rotate_criteria_table
{p2colreset}{...}


{title:Description}

{pstd}
{cmd:rotate} performs a rotation of the loading matrix after {helpb factor},
{helpb factormat}, {helpb pca} and {helpb pcamat}.  Numerous rotation criteria
(such as varimax, oblimin, etc.)  are available which can be applied with
respect to the orthogonal and/or oblique class of rotations.  {cmd:rotate}
stores in the {cmd:e()} object of the estimation command in fields
{cmd:e(r_}{it:name}{cmd:)}.  For instance, {cmd:e(r_L)} will contain the
rotated loadings.

{pstd}
{cmd:rotate, clear} removes the rotation results from the estimation
results. 

{pstd}
If you want to rotate a given matrix, see {helpb rotatemat}.  Actually, 
{cmd:rotate} is implemented using {cmd:rotatemat}.  

{pstd}
If you want a Procrustes rotation, rotating a varlist optimally toward
another varlist, see {helpb procrustes}. 


{title:Options}

{dlgtab:Main}

{phang}{opt orthogonal}
specifies that an orthogonal rotation be applied.  This is the default. 

{pmore}
See {it:{help rotate##criteria:Rotation criteria}} below for details on the
{it:rotation_methods} available with {opt orthogonal}.

{phang}{opt oblique}
specifies that an oblique rotation be applied.  This often yields more
interpretable factors with a simpler structure than obtained with an
orthogonal rotation.  In many applications (e.g., after {cmd:factor} and
{cmd:pca}) the factors before rotation are orthogonal (uncorrelated), while
the oblique rotated factors are correlated.

{pmore}
See {it:{help rotate##criteria:Rotation criteria}} below for details on the
{it:rotation_methods} available with {opt oblique}.

{phang}{opt clear}
specifies that rotation results are to be cleared (removed) from the last
estimation command.  {opt clear} may not be combined with any other option.

{pmore}
{cmd:rotate} stores its results within the {cmd:e()} results of {cmd:pca} and
{cmd:factor}, overwriting any previous rotation results.  Postestimation
commands such as {cmd:predict} operate on the last rotated results, if any,
instead of the unrotated results, and allow you to specify {cmd:norotated} to
use the unrotated results.  The {opt clear} option of {cmd:rotate} allows you
to remove the rotation results from {cmd:e()}, thus freeing you from
specifying {cmd:norotated} for the postestimation commands.

{phang}{opt normalize}, and synonym {opt horst},
request that the rotation be applied to the Horst normalization of the matrix
{it:L}, so that the rowwise sums of squares equal 1.  Horst normalization
applies to the rotated columns only (see {cmd:factors()} and
{cmd:components()} options below).

{phang}{opt factors(#)}, and synonym {opt components(#)},
specify the number of factors or components (columns of the loading matrix)
to be rotated, counted "from the left", i.e., with the lowest column index.
The other columns are left unrotated.  All columns are rotated by default.

{dlgtab:Reporting}

{phang}{opt blanks(#)}
specifies that loadings smaller than {it:#} (in absolute value) be displayed
as blanks.

{phang}{opt detail}
is rarely used; it displays the {cmd:rotatemat} output.

{phang}
{opt format(%fmt)} specifies the display format for matrices.  The default is
{cmd:format(%9.5f)}.

{phang}
{opt noloading} suppresses the display of the rotated loadings.

{phang}
{opt norotation} suppresses the display of the optimal rotation matrix.


{dlgtab:Opt options}

{phang}{it:optimize_options}
are rarely used; see {helpb rotatemat##optimizeopts:rotatemat}.


{marker criteria}{...}
INCLUDE help rotate_criteria_description


{title:Examples}

    {cmd:. factor item*, factors(3) ml}
    
    {cmd:. rotate} 
    {cmd:. rotate, varimax}
    {cmd:. rotate, oblimin oblique}
        
    {cmd:. rotate, cf(0.5) oblique protect(50)}
    
    {cmd:. rotate, clear} 


{title:Also see}

{psee}
Manual:  {bf:[MV] rotate}
{p_end}

{psee}
Online:  {helpb rotatemat};{break}
{help factor postestimation}, {help pca postestimation}; 
{helpb procrustes}
{p_end}