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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>WCSLIB 4.8.2: wtbarr Struct Reference</title>
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<h1>wtbarr Struct Reference</h1><!-- doxytag: class="wtbarr" -->Extraction of coordinate lookup tables from BINTABLE.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="getwcstab_8h-source.html">getwcstab.h</a>></code>
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<tr><td colspan="2"><br><h2>Data Fields</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#8743b84c99b4b5e7ab7bf0653507a180">i</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#1e88ad32570534a006e96cba721489b5">m</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#f8ea7b15992ab7a86be63ff83318be41">kind</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">char </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#9f1fcad814aa3da08dfa75ede2a07deb">extnam</a> [72]</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#24487eda7b17800f41bd4a452c6306d5">extver</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#10c8dba85b62e2794071dd50a41c4bb1">extlev</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">char </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#750832793167bbeebd1074e29844415d">ttype</a> [72]</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#2ff7c235353320c6dd98951484012ee7">row</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#f862b4f90b0406ed8dd0c240768d4bd3">ndim</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int * </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#901403d05f985d4a1fbd2fdc9585bd50">dimlen</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double ** </td><td class="memItemRight" valign="bottom"><a class="el" href="structwtbarr.html#41c30234dbdf18ac094872cf39562172">arrayp</a></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
Function <a class="el" href="wcshdr_8h.html#6dd857f7b61a5b349cc8af5a4b6d8a1c" title="Tabular construction routine.">wcstab()</a>, which is invoked automatically by <a class="el" href="wcshdr_8h.html#c75623ee805ab7d43b0bba684c719a60" title="FITS WCS parser routine for image headers.">wcspih()</a>, sets up an array of <b>wtbarr</b> structs to assist in extracting coordinate lookup tables from a binary table extension (BINTABLE) and copying them into the <a class="el" href="structtabprm.html" title="Tabular transformation parameters.">tabprm</a> structs stored in <a class="el" href="structwcsprm.html" title="Coordinate transformation parameters.">wcsprm</a>. Refer to the usage notes for <a class="el" href="wcshdr_8h.html#c75623ee805ab7d43b0bba684c719a60" title="FITS WCS parser routine for image headers.">wcspih()</a> and <a class="el" href="wcshdr_8h.html#6dd857f7b61a5b349cc8af5a4b6d8a1c" title="Tabular construction routine.">wcstab()</a> in <a class="el" href="wcshdr_8h.html">wcshdr.h</a>, and also the prologue to <a class="el" href="tab_8h.html">tab.h</a>.<p>
For C++ usage, because of a name space conflict with the <b>wtbarr</b> typedef defined in CFITSIO header fitsio.h, the <b>wtbarr</b> struct is renamed to <b>wtbarr_s</b> by preprocessor macro substitution with scope limited to <a class="el" href="wcs_8h.html">wcs.h</a> itself. <hr><h2>Field Documentation</h2>
<a class="anchor" name="8743b84c99b4b5e7ab7bf0653507a180"></a><!-- doxytag: member="wtbarr::i" ref="8743b84c99b4b5e7ab7bf0653507a180" args="" -->
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<td class="memname">int <a class="el" href="structwtbarr.html#8743b84c99b4b5e7ab7bf0653507a180">wtbarr::i</a> </td>
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(<em>Given</em>) Image axis number.
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<a class="anchor" name="1e88ad32570534a006e96cba721489b5"></a><!-- doxytag: member="wtbarr::m" ref="1e88ad32570534a006e96cba721489b5" args="" -->
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<td class="memname">int <a class="el" href="structwtbarr.html#1e88ad32570534a006e96cba721489b5">wtbarr::m</a> </td>
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(<em>Given</em>) wcstab array axis number for index vectors.
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<a class="anchor" name="f8ea7b15992ab7a86be63ff83318be41"></a><!-- doxytag: member="wtbarr::kind" ref="f8ea7b15992ab7a86be63ff83318be41" args="" -->
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<td class="memname">int <a class="el" href="structwtbarr.html#f8ea7b15992ab7a86be63ff83318be41">wtbarr::kind</a> </td>
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(<em>Given</em>) Character identifying the wcstab array type: <ul>
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c: coordinate array, </li>
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i: index vector. </li>
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<a class="anchor" name="9f1fcad814aa3da08dfa75ede2a07deb"></a><!-- doxytag: member="wtbarr::extnam" ref="9f1fcad814aa3da08dfa75ede2a07deb" args="[72]" -->
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<td class="memname">char <a class="el" href="structwtbarr.html#9f1fcad814aa3da08dfa75ede2a07deb">wtbarr::extnam</a> </td>
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(<em>Given</em>) <code><b>EXTNAME</b></code> identifying the binary table extension.
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<a class="anchor" name="24487eda7b17800f41bd4a452c6306d5"></a><!-- doxytag: member="wtbarr::extver" ref="24487eda7b17800f41bd4a452c6306d5" args="" -->
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<td class="memname">int <a class="el" href="structwtbarr.html#24487eda7b17800f41bd4a452c6306d5">wtbarr::extver</a> </td>
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(<em>Given</em>) <code><b>EXTVER</b></code> identifying the binary table extension.
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<a class="anchor" name="10c8dba85b62e2794071dd50a41c4bb1"></a><!-- doxytag: member="wtbarr::extlev" ref="10c8dba85b62e2794071dd50a41c4bb1" args="" -->
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<td class="memname">int <a class="el" href="structwtbarr.html#10c8dba85b62e2794071dd50a41c4bb1">wtbarr::extlev</a> </td>
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(<em>Given</em>) <code><b>EXTLEV</b></code> identifying the binary table extension.
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<a class="anchor" name="750832793167bbeebd1074e29844415d"></a><!-- doxytag: member="wtbarr::ttype" ref="750832793167bbeebd1074e29844415d" args="[72]" -->
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<td class="memname">char <a class="el" href="structwtbarr.html#750832793167bbeebd1074e29844415d">wtbarr::ttype</a> </td>
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(<em>Given</em>) <code><b>TTYPE</b>n</code> identifying the column of the binary table that contains the wcstab array.
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<a class="anchor" name="2ff7c235353320c6dd98951484012ee7"></a><!-- doxytag: member="wtbarr::row" ref="2ff7c235353320c6dd98951484012ee7" args="" -->
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<td class="memname">long <a class="el" href="structwtbarr.html#2ff7c235353320c6dd98951484012ee7">wtbarr::row</a> </td>
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(<em>Given</em>) Table row number.
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<a class="anchor" name="f862b4f90b0406ed8dd0c240768d4bd3"></a><!-- doxytag: member="wtbarr::ndim" ref="f862b4f90b0406ed8dd0c240768d4bd3" args="" -->
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<td class="memname">int <a class="el" href="structwtbarr.html#f862b4f90b0406ed8dd0c240768d4bd3">wtbarr::ndim</a> </td>
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(<em>Given</em>) Expected dimensionality of the wcstab array.
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<a class="anchor" name="901403d05f985d4a1fbd2fdc9585bd50"></a><!-- doxytag: member="wtbarr::dimlen" ref="901403d05f985d4a1fbd2fdc9585bd50" args="" -->
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<td class="memname">int * <a class="el" href="structwtbarr.html#901403d05f985d4a1fbd2fdc9585bd50">wtbarr::dimlen</a> </td>
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(<em>Given</em>) Address of the first element of an array of int of length ndim into which the wcstab array axis lengths are to be written.
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<a class="anchor" name="41c30234dbdf18ac094872cf39562172"></a><!-- doxytag: member="wtbarr::arrayp" ref="41c30234dbdf18ac094872cf39562172" args="" -->
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<td class="memname">double ** <a class="el" href="structwtbarr.html#41c30234dbdf18ac094872cf39562172">wtbarr::arrayp</a> </td>
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(<em>Given</em>) Pointer to an array of double which is to be allocated by the user and into which the wcstab array is to be written.
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