table_io

table_io, an Octave code which can read or write a TABLE file.

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).

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 M or N is explicitly included in the file. It is up to the I/O program to determine this.

TABLE_IO supplies routines by which a TABLE file can easily be written or read. A typical write operation simply calls routine R8MAT_WRITE. A typical read operation will probably first want to call R8MAT_HEADER_READ to determine the values of M and N, and then allocate space for the table, and then call R8MAT_DATA_READ to read the data.

Licensing:

The computer code and data files described and made available on this web page are distributed under the MIT license

Languages:

table_io is available in a C version and a C++ version and a Fortan90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

table_io_test

table, a format which is used for the files input or output by the TABLE_IO library.

Source Code:

• ch_cap.m, returns the uppercase version of a character.
• file_column_count.m, counts the number of columns in the first line of a file.
• file_row_count.m, counts the number of row records in a file.
• i4_log_10.m, returns the integer part of the logarithm, base 10, of an integer.
• i4mat_border_add.m, adds a "border" to an I4MAT.
• i4mat_border_cut.m, cuts the "border" of an I4MAT.
• i4mat_data_read.m, reads a table from an I4MAT file.
• i4mat_header_read.m, reads a header from an I4MAT file.
• i4mat_indicator.m, sets up an indicator I4MAT.
• i4mat_print.m, prints an I4MAT.
• i4mat_print_some.m, prints some of an I4MAT.
• i4mat_read.m, reads an I4MAT file.
• i4mat_transpose_write.m, writes the transpose of an I4MAT to a file.
• i4mat_write.m, writes an I4MAT to a file.
• i4vec_data_read.m, reads the data from an I4VEC file.
• i4vec_write.m, writes an I4VEC to a file.
• l4vec_data_read.m, reads a table from an L4VEC file.
• l4vec_header_read.m, reads a header from an L4VEC file.
• l4vec_write.m, writes an L4VEC (logical vector) to a file.
• r8mat_border_add.m, adds a "border" to an R8MAT.
• r8mat_border_cut.m, cuts the "border" of an R8MAT.
• r8mat_data_read.m, reads the data from an R8MAT file.
• r8mat_header_read.m, reads the header from an R8MAT file.
• r8mat_indicator.m, sets up an indicator R8MAT.
• r8mat_print.m, prints an R8MAT.
• r8mat_print_some.m, prints some of an R8MAT.
• r8mat_read.m, reads an R8MAT from a text file.
• r8mat_read_bin.m, reads an R8MAT from a binary file.
• r8mat_transpose_print.m, prints the transpose of an R8MAT.
• r8mat_transpose_print_some.m, prints the transpose of some of an R8MAT.
• r8mat_uniform_01.m, fills an R8MAT with pseudorandom numbers.
• r8mat_uniform_01_test.m
• r8mat_write.m, writes an R8MAT to a text file.
• r8mat_write_bin.m, writes an R8MAT to a binary file.
• r8vec_data_read.m, reads the data from an R8VEC file.
• r8vec_header_read.m, reads the header from an R8VEC file.
• r8vec_print.m, prints an R8VEC.
• r8vec_uniform_01.m, returns a random R8VEC in [0,1].
• r8vec_write.m, writes an R8VEC to a file.
• r8vec2_write.m, writes an R8VEC2 to a file.
• s_len_trim.m, returns the length of a character string to the last nonblank.
• s_to_l.m, extracts a logical value from a string.
• s_word_count.m, counts the number of words in a string.