mf_blockdiag.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}
{* 15mar2004}{...}
{cmd:help mata blockdiag()}
{hline}
{* index block diagonal matrix}{...}
{* index blockdiag()}{...}

{title:Title}

{p 4 4 2}
{bf:[M-5] blockdiag() -- Block-diagonal matrix}


{title:Syntax}

{p 8 12 2}
{it:numeric matrix}
{cmd:blockdiag(}{it:numeric matrix Z1}{cmd:,}
{it:numeric matrix Z2}{cmd:)}


{title:Description}

{p 4 4 2}
{cmd:blockdiag(}{it:Z1}{cmd:,} {it:Z2}{cmd:)} 
returns a block-diagonal matrix with {it:Z1} in the upper-left corner and
{it:Z2} in the lower right, i.e., 

			{c TLC}{c -}      {c -}{c TRC}
			{c |} {it:Z1}   {bf:0} {c |}
			{c |}  {bf:0}  {it:Z2} {c |}
			{c BLC}{c -}      {c -}{c BRC}

{p 4 4 2}
{it:Z1} and {it:Z2} may be either real or complex and need not be of the 
same type.


{title:Remarks}

{p 4 4 2}
To create a block diagonal matrix of {it:Z1}, {it:Z2}, {it:Z3}, code

	: {cmd:blockdiag(}{it:Z1}{cmd:, blockdiag(}{it:Z2}{cmd:,}{it:Z3}{cmd:))}


{title:Conformability}


    {cmd:blockdiag(}{it:Z1}{cmd:,} {it:Z2}{cmd:)}:
	       {it:Z1}:  {it:r1 x c1}
	       {it:Z2}:  {it:r2 x c2}
	   {it:result}:  {it:r1}+{it:r2} {it:x} {it:c1}+{it:c2}


{title:Diagnostics}

{p 4 4 2}
None.  Note that either or both {it:Z1} and {it:Z2} may be void.


{title:Source code}

{p 4 4 2}
{view blockdiag.mata, adopath asis:blockdiag.mata}


{title:Also see}

{p 4 13 2}
Manual:  {hi:[M-5] blockdiag()}

{p 4 13 2}
Online:  help for 
{bf:{help m4_matrix:[M-4] matrix}}
{p_end}