POINTS_DISPLAY
Display a Pointset in the MATLAB Graphics Window

POINTS_DISPLAY is a MATLAB program, using double precision arithmetic, which reads a set of 2D or 3D points from a file and plots them in the MATLAB graphics window.

The file containing the point coordinates is in the TABLE format.

The MATLAB command scatter or scatter3 is used to display the points.

Related Data and Programs:

BOX_PLOT is an executable MATLAB program which can color in specified entries of a checkerboard, corresponding to pairs of integer data.

NESTED_SEQUENCE_DISPLAY is a MATLAB program which reads a set of sequences, plots them as horizontal lines of data, and connects sequence entries that are equal.

PLOT_POINTS is an executable FORTRAN90 program which reads a set of points from a file and plots them into an Encapsulated PostScript file.

POINTS_DISPLAY_OPEN_GL is an executable C++ program which reads a set of points from a file and plots them in an OpenGL graphics window.

TABLE is a format that is used for the input file containing the point coordinates.

TRI_MESH_DISPLAY is a MATLAB program which reads data defining a triangular mesh of a 3D surface and displays it.

Usage:

points_display ( 'point_file_name' )

reads the point coordinates from point_file_name and plots the points in a MATLAB graphics window.

Source Code:

• points_display.m the main routine, which accepts a file name, reads the coordinates of points from the file, and plots the points in a MATLAB graphics window.
• dtable_data_read.m reads data from a double precision table file.
• dtable_header_read.m reads the header from a double precision table file.
• 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.
• r8mat_transpose_print_some.m prints some of the transpose of an R8MAT.
• s_escape_tex.m de-escapes TeX escape sequences.
• s_len_trim.m returns the length of a string to the last nonblank.
• s_word_count.m counts the number of "words" in a string.
• timestamp.m prints the current YMDHMS date as a time stamp.

Examples and Tests:

LSUP_303_2D is a set of 303 points in 2D that outline Lake Superior:

• lsup_303_2d.txt, a file containing the coordinates of the points.
• lsup_303_2d.out, the output from a run of the program.
• lsup_303_2d.png, a PNG image of a plot of the points.

HELIX_201_3D is a set of 201 points in 3D that trace a helix:

• helix_201_3d.txt, a file containing the coordinates of the points.
• helix_201_3d.out, the output from a run of the program.
• helix_201_3d.png, a PNG image of a plot of the points.

You can go up one level to the MATLAB source codes.