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<html>
<head>
<title>
TABLE_IO - Read or Write a TABLE file
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
TABLE_IO <br> Table Files <br> Read and Write Utilities
</h1>
<hr>
<p>
<b>TABLE_IO</b>
is a C++ library which
can read or write a TABLE file.
</p>
<p>
A TABLE file is a simple format for storing a double-indexed
array of data. We regard this is a situation involving N
points in M dimensions, with M relatively small
(often just 2 or 3, but possibly 10 or 20) while N can
be "enormous" (10, 100, 1,000 or 10,000).
</p>
<p>
To keep things simple, then, the data is written to an ASCII
file, with optional comment lines (which must start with the
'#' character) and blank lines (which are ignored). The point
data is stored by writing the coordinates of each point on
a separate line. No information about <b>M</b> or <b>N</b> is
explicitly included in the file.
It is up to the I/O program to determine this.
</p>
<p>
TABLE_IO supplies routines by which a TABLE file can
easily be written or read. A typical write operation simply
calls routine <b>R8MAT_WRITE</b>. A typical read operation
will probably first want to call <b>R8MAT_HEADER_READ</b>
to determine the values of <b>M</b> and <b>N</b>, and then
allocate space for the table, and then call <b>R8MAT_DATA_READ</b>
to read the data.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>TABLE_IO</b> is available in
<a href = "../../c_src/table_io/table_io.html">a C version</a> and
<a href = "../../cpp_src/table_io/table_io.html">a C++ version</a> and
<a href = "../../f77_src/table_io/table_io.html">a FORTRAN77 version</a> and
<a href = "../../f_src/table_io/table_io.html">a FORTRAN90 version</a> and
<a href = "../../m_src/table_io/table_io.html">a MATLAB version</a> and
<a href = "../../py_src/table_io/table_io.html">a Python version</a> and
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../data/table/table.html">
TABLE</a>,
a file format which
is used for the storage of table files.
</p>
<p>
<a href = "../../cpp_src/table_border/table_border.html">
TABLE_BORDER</a>,
a C++ program which
can read a TABLE file
and add zero entries corresponding to a single layer of
boundary data.
</p>
<p>
<a href = "../../cpp_src/table_delaunay/table_delaunay.html">
TABLE_DELAUNAY</a>,
a C++ program which
reads a
file of 2d point coordinates and computes the Delaunay triangulation.
</p>
<p>
<a href = "../../cpp_src/table_latinize/table_latinize.html">
TABLE_LATINIZE</a>,
a C++ program which
can read a TABLE file
and write out a "latinized" version.
</p>
<p>
<a href = "../../cpp_src/table_quality/table_quality.html">
TABLE_QUALITY</a>,
a C++ program which
can read a TABLE file
and print out measures of the quality of dispersion of the points.
</p>
<p>
<a href = "../../cpp_src/table_unborder/table_unborder.html">
TABLE_UNBORDER</a>,
a C++ program which
can be used to remove the
border from a table file.
</p>
<p>
<a href = "../../cpp_src/table_voronoi/table_voronoi.html">
TABLE_VORONOI</a>,
a C++ program which
reads a TABLE file
describing a set of 2D points, and print out information
describing the Voronoi diagram of those points.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "table_io.cpp">table_io.cpp</a>, the source code.
</li>
<li>
<a href = "table_io.hpp">table_io.hpp</a>, the include file.
</li>
<li>
<a href = "table_io.sh">table_io.sh</a>,
commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "table_io_prb.cpp">table_io_prb.cpp</a>,
a sample calling program.
</li>
<li>
<a href = "table_io_prb.sh">table_io_prb.sh</a>,
commands to compile and run the sample program.
</li>
<li>
<a href = "table_io_prb_output.txt">table_io_prb_output.txt</a>,
the output from a run of the sample program.
</li>
<li>
<a href = "r8mat_05_00020.txt">r8mat_05_00020.txt</a>,
the R8MAT file created by the sample program, with
N = 20 points in M = 5 dimensions.
</li>
<li>
<a href = "i4mat_05_00020.txt">i4mat_05_00020.txt</a>,
the I4MAT file created by the sample program, with
N = 20 points in M = 5 dimensions.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>CH_CAP</b> capitalizes a single character.
</li>
<li>
<b>CH_EQI</b> is true if two characters are equal, disregarding case.
</li>
<li>
<b>CH_TO_DIGIT</b> returns the integer value of a base 10 digit.
</li>
<li>
<b>FILE_COLUMN_COUNT</b> counts the columns in the first line of a file.
</li>
<li>
<b>FILE_ROW_COUNT</b> counts the number of row records in a file.
</li>
<li>
<b>I4_LOG_10</b> returns the integer part of the logarithm base 10 of ABS(X).
</li>
<li>
<b>I4_MAX</b> returns the maximum of two I4's.
</li>
<li>
<b>I4_MIN</b> returns the minimum of two I4's.
</li>
<li>
<b>I4MAT_BORDER_ADD</b> adds a "border" to an I4MAT.
</li>
<li>
<b>I4MAT_BORDER_CUT</b> cuts the "border" of an I4MAT.
</li>
<li>
<b>I4MAT_DATA_READ</b> reads data from an I4MAT file.
</li>
<li>
<b>I4MAT_HEADER_READ</b> reads the header from an I4MAT file.
</li>
<li>
<b>I4MAT_INDICATOR_NEW</b> sets up an "indicator" I4MAT.
</li>
<li>
<b>I4MAT_PRINT</b> prints an I4MAT, with an optional title.
</li>
<li>
<b>I4MAT_PRINT_SOME</b> prints some of an I4MAT.
</li>
<li>
<b>I4MAT_READ</b> reads the information from an I4MAT file.
</li>
<li>
<b>I4MAT_WRITE</b> writes an I4MAT file with no header.
</li>
<li>
<b>I4VEC_DATA_READ</b> reads data from an I4VEC file.
</li>
<li>
<b>I4VEC_DATA_READ_NEW</b> reads data from an I4VEC file.
</li>
<li>
<b>I4VEC_WRITE</b> writes an I4VEC to a file.
</li>
<li>
<b>L4VEC_DATA_READ_NEW</b> reads data from an L4VEC file.
</li>
<li>
<b>L4VEC_HEADER_READ</b> reads the header from an L4VEC file.
</li>
<li>
<b>L4VEC_WRITE</b> writes an L4VEC to a file.
</li>
<li>
<b>R4MAT_DATA_READ</b> reads the data from an R4MAT file.
</li>
<li>
<b>R4MAT_HEADER_READ</b> reads the header from an R4MAT file.
</li>
<li>
<b>R4MAT_INDICATOR_NEW</b> sets up an "indicator" R4MAT.
</li>
<li>
<b>R4MAT_PRINT</b> prints an R4MAT, with an optional title.
</li>
<li>
<b>R4MAT_PRINT_SOME</b> prints some of an R4MAT.
</li>
<li>
<b>R4MAT_READ</b> reads information from an R4MAT file.
</li>
<li>
<b>R4MAT_TRANSPOSE_PRINT</b> prints an R4MAT, transposed.
</li>
<li>
<b>R4MAT_TRANSPOSE_PRINT_SOME</b> prints some of an R4MAT, transposed.
</li>
<li>
<b>R4MAT_UNIFORM_01</b> returns a unit pseudorandom R4MAT.
</li>
<li>
<b>R4MAT_WRITE</b> writes an R4MAT file.
</li>
<li>
<b>R8MAT_BORDER_ADD</b> adds a "border" to an R8MAT.
</li>
<li>
<b>R8MAT_BORDER_CUT</b> cuts the "border" of an R8MAT.
</li>
<li>
<b>R8MAT_DATA_READ</b> reads the data from an R8MAT file.
</li>
<li>
<b>R8MAT_HEADER_READ</b> reads the header from an R8MAT file.
</li>
<li>
<b>R8MAT_INDICATOR_NEW</b> sets up an "indicator" R8MAT.
</li>
<li>
<b>R8MAT_PRINT</b> prints an R8MAT, with an optional title.
</li>
<li>
<b>R8MAT_PRINT_SOME</b> prints some of an R8MAT.
</li>
<li>
<b>R8MAT_READ</b> reads information from an R8MAT file.
</li>
<li>
<b>R8MAT_TRANSPOSE_PRINT</b> prints an R8MAT, transposed.
</li>
<li>
<b>R8MAT_TRANSPOSE_PRINT_SOME</b> prints some of an R8MAT, transposed.
</li>
<li>
<b>R8MAT_UNIFORM_01</b> returns a unit pseudorandom R8MAT.
</li>
<li>
<b>R8MAT_WRITE</b> writes an R8MAT file.
</li>
<li>
<b>R8VEC_DATA_READ</b> reads the data from an R8VEC file.
</li>
<li>
<b>R8VEC_DATA_READ_NEW</b> reads the data from an R8VEC file.
</li>
<li>
<b>R8VEC_HEADER_READ</b> reads the header from an R8VEC file.
</li>
<li>
<b>R8VEC_WRITE</b> writes an R8VEC file.
</li>
<li>
<b>R8VEC2_WRITE</b> writes an R8VEC2 file.
</li>
<li>
<b>S_LEN_TRIM</b> returns the length of a string to the last nonblank.
</li>
<li>
<b>S_TO_I4</b> reads an I4 from a string.
</li>
<li>
<b>S_TO_I4VEC</b> reads an I4VEC from a string.
</li>
<li>
<b>S_TO_L4</b> reads an L4 from a string.
</li>
<li>
<b>S_TO_R4</b> reads an R4 from a string.
</li>
<li>
<b>S_TO_R4VEC</b> reads an R4VEC from a string.
</li>
<li>
<b>S_TO_R8</b> reads an R8 from a string.
</li>
<li>
<b>S_TO_R8VEC</b> reads an R8VEC from a string.
</li>
<li>
<b>S_WORD_COUNT</b> counts the number of "words" in a string.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../cpp_src.html">
the C++ source codes</a>.
</p>
<hr>
<i>
Last revised on 17 July 2014.
</i>
<!-- John Burkardt -->
</body>
<!-- Initial HTML skeleton created by HTMLINDEX. -->
</html>