mf_ascii.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}
{* 29mar2005}{...}
{cmd:help mata ascii()}
{hline}
{* index ascii()}{...}
{* index char()}{...}
{* index ASCII codes}{...}

{title:Title}

{p 4 4 2}
{bf:[M-5] ascii() -- Manipulate ASCII codes}


{title:Syntax}

{p 8 12 2}
{it:real rowvector} {cmd:ascii(}{it:string scalar s}{cmd:)}

{p 8 12 2}
{it:string scalar}{bind:  }{cmd:char(}{it:real rowvector c}{cmd:)}


{title:Description}

{p 4 4 2}
{cmd:ascii(}{it:s}{cmd:)}
returns a rowvector containing the ASCII codes corresponding to {it:s}.  For
instance, {cmd:ascii("abc")} returns (97, 98, 99).

{p 4 4 2}
{cmd:char(}{it:c}{cmd:)}
returns a string consisting of the specified ASCII codes.
For instance, {cmd:char((97, 98, 99))} returns "abc".


{title:Conformability}

    {cmd:ascii(}{it:s}{cmd:)}:
	    {it:s}:  1 {it:x} 1
       {it:result}:  1 {it:x} {cmd:strlen(}{it:s}{cmd:)}

    {cmd:char(}{it:c}{cmd:)}
	    {it:c}:  1 {it:x} {it:n}, {it:n}>=0
       {it:result}:  1 {it:x} 1


{title:Diagnostics}

{p 4 4 2}
{cmd:ascii(}{it:s}{cmd:)} returns J(1,0,.)  if {cmd:strlen(}{it:s}{cmd:)}==0.

{p 4 4 2}
In {cmd:char(}{it:c}{cmd:)}, if any element of {it:c} is outside the range 0
to 255, the returned string is terminated at that point.  For instance,
{cmd:char((97,98,99,1000,97,98,99))}="abc".

{p 4 4 2}
{cmd:char(J(1,0,.))} returns "".


{title:Source code}

{p 4 4 2}
Functions are built-in.


{title:Also see}

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

{p 4 13 2}
Online:  help for 
{bf:{help m4_string:[M-4] string}}
{p_end}