function?[dataout?sampint?varargout]?=?altreadsegy（sgyfile?varargin）

%?function?[dataout?sampint?...]?=?altreadsegy（sgyfile?‘property_name‘?property_value?...）
%
%?Reads?segy?data?into?a?structured?array?format?in?Matlab?workspace.
%
%?dataout???=?a?2-D?array?containing?the?data?of?interest
%?sampint???=?sample?interval?in?seconds?（optional）
%
%?Optional?properties
%?
%?textheader
%???yes????-?sends?the?text?header?to?one?of?the?output?arguments
%?
%?textformat
%???ascii??-?force?text?header?to?be?interpretted?as?ascii
%???ebcdic?-?force?text?header?to?be?interpretted?as?ebcdic
%
%?fpformat
%???ibm????-?force?floating?point?numbers?to?be?interpreted?as?IBM360?floating?point?format?（SEG-Y?prior?to?2002）
%???ieee???-?force?floating?point?numbers?to?be?interpreted?as?IEEE?floating?point?format?（SEG-Y?revision?2?（after?2002））
%????????????and?some?non-standard?SEG-Y?generating?software?--?particularly?on?PC?systems
%?traces
%???specify?a?vector?of?desired?traces?within?the?file.??The?first?trace?is?1.??For?example?to?read?every?third?trace:
%???traces?=?1:3:ntraces
%
%?nt
%???-?for?non-compliant?SEG-Y?files?which?contain?a?missing?or?incorrect
%?????????????number?of?samples?per?trace?in?the?binary?header?one?can?supply?this
%?????????????value.??Not?recommended?for?typical?use.
%
%?The?following?properties?DO?NOT?WORK?YET?but?are?planned:
%?times????-?specify?the?desired?time?window:?[starttime?endtime]??（both?in?fractional?seconds）
%?depths???-?specify?the?desired?depth?window:?[startdepth?enddepth]??（both?in?fractional?seconds）
%?traceheader???-?specify?a?headers?to?retreive?（possible?header?names:?sxsyrxrycdp）.??
%????????????A?vector?of?header?values?is?generated?for?each?header?word?（indexed?by?trace）.??
%????????????One?output?argument?must?be?supplied?for?each?desired?header.??To?obtain?more?than?one?header
%????????????separate?the?header?names?with?a?comma.?
%????????????????For?example:?[datadtsxsyrxry]?=?altreadsegy（‘foo.sgy‘‘headers‘‘sxsyrxry‘）
%?timevector?-?return?a?vector?of?times?corresponding?to?samples?in?dataout.
%
%
%?Examples:
%
%?Read?and?display?all?the?seismic?data:
%??dataout?=?altreadsegy（‘foo.sgy‘）;
%??plotseis（dataout）;??
%
%?Read?the?data?display?it?with?the?correct?time?scale?and?view?the?text?header:
%??[dataout?sampint?textheader]?=?altreadsegy（‘foo.sgy‘‘textheader‘‘yes‘）;
%??t?=?0:sampint:（size（dataout1）-1）*sampint;
%??plotseis（dataoutt）;?disp（textheader）;
%
%?Troubleshooting?advise:??add?‘verbose‘‘yes‘?to?your?argument?list?like
%?this:
%??dataout?=?altreadsegy（‘foo.sgy‘‘verbose‘‘yes‘）;
%
property_strings?=?...
????{‘textformat‘‘fpformat‘‘segfmt‘‘traces‘‘times‘‘depths‘‘textheader‘‘traceheader‘‘verbose‘‘nt‘};

argout=0;

verbose?=?FindValue（‘verbose‘property_stringsvarargin{:}）;

if?（~ischar（sgyfile））
	error（‘First?argument?must?be?a?file?name‘）;
end

fileinfo?=?dir（sgyfile）;?%?Fileinfo?is?a?str

?屬性????????????大小?????日期????時間???名稱
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?????文件??????10572??2003-07-15?08:44??sgy\altreadsegy.m

?????文件???????5903??2004-08-13?14:23??sgy\altwritesegy.m

?????文件???????2137??2002-07-09?13:07??sgy\ascii2ebcdic.m

?????文件???????1881??2002-11-29?15:05??sgy\ebcdic2ascii.m

?????文件?????863760??2011-04-20?23:31??sgy\shot.sgy

?????目錄??????????0??2011-07-06?10:32??sgy

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???????????????884253????????????????????6