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<TITLE>/</TITLE><BODY><A HREF = "../index.html">[Master Index]</A><A HREF = "index.html">[Index for ./main]</A><H1>mat2segy</H1><H2>(./main/mat2segy.m)</H2><HR><H3>Function Synopsis</H3><pre>mat2segy(datain,filename,cross_wire_file,platform,reel_id_header)</pre><HR><H3>Help text</H3><pre> mat2segy(datain,filename,crosswire,platform,reel_id_header) This function stores a DSI variable in SEG-Y format. This module has been written to use a crosswire file to designate trace header locations. This is the same crosswire file as used for '<A HREF = "../8.main/segy2mat.html">segy2mat</A>'. The crosswire file is and ASCII file consisting of numbers only separted into columns using either spaces or Tabs. MATLAB-style comments can be included in the file provided that they begin with a percent character '%'. The file should consist of 5 columns: segy byte to start at (byte 1 is beginning of a trace header), the format of this element (1 for 'char', 2 for 'int16', and 3 for 'int32'), a divisor, a subtractve constant and the DSI trace header word where this value is stored. For segy-mat(dsi) the multiplier is applied before the additive constant, so for mat(dsi) -> segy the subtractive constant is applied before the divisor. The SEG-Y format is defined in: Barry, K.M., Cavers, D.A., and Kneale, C.W., Recomended Standards for Digital Tape Formats, Geophysics, Vol. 40, No. 2 (April 1975), P. 344-352. This script's output is not standard SEG-Y. The values are stored as native floating point format, rather than IBM floating point format. INPUTdatain - seismic data in DSI formatfilename - name of segy file. Must be enclosed in single quotes.cross_wire_file - name of crosswire file. Must be enclosed in single quotes.platform = 'l' for little-endian (PC) files 'b' for big-endian (Unix) filesreel_id_header - string variable containing a description of the file this string will be stored in the reel identification header of the segy fileDSISoft Customized VSP Processing softwarewritten by K.S. Beaty June, 1998</pre><HR>Produced by <A HREF = "http://www.nd.edu/Courses/kantor/matlab/mat2html">mat2html</A> on Wed Jun 14 15:21:32 Canada/Eastern 2000<BR>Cross-Directory links are: ON<BR></BODY>⌨️ 快捷键说明
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