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table_io.html
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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 file<br>Read and Write Utilities
</h1>
<hr>
<p>
<b>TABLE_IO</b>
is a FORTRAN90 library which
can read or write a TABLE file.
</p>
<p>
A <a href = "../../data/table/table.html">
TABLE file</a> is a simple format for storing a double-indexed
array of data. We regard this is a situation involving <b>N</b>
points in <b>M</b> dimensions, with <b>M</b> relatively small
(often just 2 or 3, but possibly 10 or 20) while <b>N</b> 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>
<b>TABLE_IO</b> supplies routines by which a TABLE file can
easily be written or read. A typical write operation for a
double precision real table 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>
<p>
<b>TABLE_IO</b> includes routines to read and write table
datasets whose entries are integers (I4MAT) or
double precision reals (R8MAT).
</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>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../f_src/table_barplot_ppma/table_barplot_ppma.html">
TABLE_BARPLOT_PPMA</a>,
a FORTRAN90 program which
reads a table file and creates a
PPMA bargraph of the data.
</p>
<p>
<a href = "../../f_src/table_border/table_border.html">
TABLE_BORDER</a>,
a FORTRAN90 program which
can be used to add a border
(of zero values) to a table file.
</p>
<p>
<a href = "../../f_src/table_columns/table_columns.html">
TABLE_COLUMNS</a>,
a FORTRAN90 program which
can extract specific columns of data
from a table file.
</p>
<p>
<a href = "../../f_src/table_columns_permute/table_columns_permute.html">
TABLE_COLUMNS_PERMUTE</a>,
a FORTRAN90 program which
permutes the columns of a
table file.
</p>
<p>
<a href = "../../f_src/table_delaunay/table_delaunay.html">
TABLE_DELAUNAY</a>,
a FORTRAN90 program which
computes the Delaunay triangulation of a set
of points.
</p>
<p>
<a href = "../../f_src/table_histogram/table_histogram.html">
TABLE_HISTOGRAM</a>,
a FORTRAN90 program which
can make a histogram of a set of points
stored in a table file.
</p>
<p>
<a href = "../../f_src/table_latinize/table_latinize.html">
TABLE_LATINIZE</a>,
a FORTRAN90 program which
reads a file of
points and creates a "latinized" version by adjusting the data.
</p>
<p>
<a href = "../../f_src/table_merge/table_merge.html">
TABLE_MERGE</a>,
a FORTRAN90 program which
reads a file of
points, and removes duplicates, and points that are close to each other.
</p>
<p>
<a href = "../../f_src/table_orthonormalize/table_orthonormalize.html">
TABLE_ORTHONORMALIZE</a>,
a FORTRAN90 program which
reads a file of
points and orthonormalizes the columns.
</p>
<p>
<a href = "../../f_src/table_quality/table_quality.html">
TABLE_QUALITY</a>,
a FORTRAN90 program which
reads a file of
points and computes the quality of dispersion.
</p>
<p>
<a href = "../../f_src/table_record_match/table_record_match.html">
TABLE_RECORD_MATCH</a>,
a FORTRAN90 program which
finds close records in a table file.
</p>
<p>
<a href = "../../f_src/table_scale/table_scale.html">
TABLE_SCALE</a>,
a FORTRAN90 program which
multiplies the entries of a table file
by a scale vector.
</p>
<p>
<a href = "../../f_src/table_shift/table_shift.html">
TABLE_SHIFT</a>,
a FORTRAN90 program which
shifts the entries of a table file
by a shift vector.
</p>
<p>
<a href = "../../f_src/table_stats/table_stats.html">
TABLE_STATS</a>,
a FORTRAN90 program which
reads a table file and computes certain statistics.
</p>
<p>
<a href = "../../f_src/table_tet_mesh/table_tet_mesh.html">
TABLE_TET_MESH</a>,
a FORTRAN90 program which
reads a table file of 3D data, and computes a
tetrahedral mesh.
</p>
<p>
<a href = "../../f_src/table_top/table_top.html">
TABLE_TOP</a>,
a FORTRAN90 program which
reads a table file of M-dimensional data and
makes a table of plots of all pairs of coordinates.
</p>
<p>
<a href = "../../f_src/table_unborder/table_unborder.html">
TABLE_UNBORDER</a>,
a FORTRAN90 program which
removes the border from a table file.
</p>
<p>
<a href = "../../f_src/table_uniform_noise/table_uniform_noise.html">
TABLE_UNIFORM_NOISE</a>,
a FORTRAN90 program which
adds a uniform noise term to the data
in a table file.
</p>
<p>
<a href = "../../f_src/table_voronoi/table_voronoi.html">
TABLE_VORONOI</a>,
a FORTRAN program which
can be used to compute information about
the Voronoi diagram of the points.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "table_io.f90">table_io.f90</a>, the source code.
</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.f90">table_io_prb.f90</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 file.
</li>
<li>
<a href = "r8mat_05_00020.txt">r8mat_05_00020.txt</a>,
an 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>,
an 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 a case insensitive comparison of two characters for equality.
</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 number of 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>GET_UNIT</b> returns a free FORTRAN unit number.
</li>
<li>
<b>I4_HUGE</b> returns a "huge" I4.
</li>
<li>
<b>I4_LOG_10</b> returns the integer part of the logarithm base 10 of ABS(X).
</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.
</li>
<li>
<b>I4MAT_INDICATOR</b> sets up an "indicator" I4MAT.
</li>
<li>
<b>I4MAT_PRINT</b> prints an I4MAT.
</li>
<li>
<b>I4MAT_PRINT_SOME</b> prints some of an I4MAT.
</li>
<li>
<b>I4MAT_WRITE</b> writes an I4MAT file.
</li>
<li>
<b>LVEC_DATA_READ</b> reads data from an LVEC file.
</li>
<li>
<b>LVEC_HEADER_READ</b> reads the header from an LVEC file.
</li>
<li>
<b>LVEC_WRITE</b> writes an LVEC 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>R4MAT_DATA_READ</b> reads data from an R4MAT file.
</li>
<li>
<b>R4MAT_HEADER_READ</b> reads the header from an R4MAT file.
</li>
<li>
<b>R4MAT_INDICATOR</b> sets up an "indicator" R4MAT.
</li>
<li>
<b>R4MAT_PRINT</b> prints an R4MAT.
</li>
<li>
<b>R4MAT_PRINT_SOME</b> prints some of an R4MAT.
</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_DATA_READ</b> reads data from an R8MAT file.
</li>
<li>
<b>R8MAT_HEADER_READ</b> reads the header from an R8MAT file.
</li>
<li>
<b>R8MAT_INDICATOR</b> sets up an "indicator" R8MAT.
</li>
<li>
<b>R8MAT_PRINT</b> prints an R8MAT.
</li>
<li>
<b>R8MAT_PRINT_SOME</b> prints some of an R8MAT.
</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 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_DATA_READ</b> reads data from an R8VEC2 file.
</li>
<li>
<b>R8VEC2_HEADER_READ</b> reads the header from an R8VEC2 file.
</li>
<li>
<b>R8VEC2_WRITE</b> writes an R8VEC2 file.
</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_L</b> reads a logical value from a string.
</li>
<li>
<b>S_TO_R4</b> reads an R4 value 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 = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 11 June 2012.
</i>
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