**line_grid**,
a C++ code which
generates a grid of points
over the interior of a line segment in 1D.

The 1D line segment is the set of points X such that:

A <= X <= B

The parameters are:

- N, the number of points;
- A, B, the left and right endpoints;
- C, one of 5 choices for centering the grid.

The centering options allow the user to control the centering of the equally spaced points. This is easiest to illustrate if we assume A = 0 and B = 1. Then, using N = 4, the centering options will produce 4 equally spaced points as follows:

- 1: 0, 1/3, 2/3, 1 (include endpoints)
- 2: 1/5, 2/5, 3/5, 4/5 (do not include endpoints)
- 3: 0, 1/4, 2/4, 3/4 (do not include right endpoint)
- 4: 1/4, 2/4, 3/4, 1 (do not include left endpoint)
- 5: 1/8, 3/8, 5/8, 7/8 (half spacing at the ends)

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

**line_grid** is available in
a C version and
a C++ version and
a FORTRAN90 version and
a MATLAB version and
a Python version.

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- line_grid.cpp, the source code.
- line_grid.sh, compiles the source code.
- line_grid.hpp, the include file.