cart2sph

Contents: Description, Arguments, Usage, Examples, Sub-Functions, Related Functions, Source Supported Under Version: > 1.22 Current .dvrc Version: 1.29 Description Convert Cartesian (rectangular) coordinates to spherical Arguments and Return Values Parameters: Three inputs specifying the x, y, and z values, respectively. Return Value: An array specifying the radial, latitude, and longitude coordinates, respectively, with angles in degrees. Usage Syntax: cart2sph(x, y, z) All inputs should be numeric. These are not the conventional spherical coordinates, but they should be more useful for people doing work in planetary coordinates. Zero longitude corresponds to the x-axis; 90 E is y-axis. Zero latitude is the equatorial (xy) plane. This function can handle array inputs, but when entering them, you will probably want their x-dimensions to be one, so that the returned values are easier to read. The function concatenates the output coordinates along their x-axis. When cart2sph() is entered without any arguments, it prints its description, as shown below. Examples dv> cart2sph() Convert Cartesian (rectangular) coordinates to spherical cart2sph(x, y, z) returns (r, latitude, longitude) where r is the radial coordinate, and latitude and longitude are in degrees. Returned angles are in degrees. Longitude is east-positive. Zero longitude corresponds to the x-axis; 90 E is y-axis. x, y, and z must be entered as separate arguments To make the output easier to read, inputs should only have one row. S.Marshall 10-30-2009 0 dv> cart2sph(1, 1, 0) 3x1x1 array of float, bsq format [12 bytes] 1.41421353816986 0.00000000000000 45.0000000000000 dv> cart2sph(0, 0, 1) 3x1x1 array of float, bsq format [12 bytes] 1.00000000000000 90.0000000000000 0.00000000000000 dv> cart2sph(clone(-1, 1, 5), clone(1, 1, 5), cat(-sqrt(2), -1., 0., 1., sqrt(2), axis=y)) 3x5x1 array of float, bsq format [60 bytes] 2.00000000000000 -45.0000000000000 135.000000000000 1.73205077648163 -35.2643890380859 135.000000000000 1.41421353816986 0.00000000000000 135.000000000000 1.73205077648163 35.2643890380859 135.000000000000 2.00000000000000 45.0000000000000 135.000000000000

DavinciWiki Mini-Nav Bar Contents Functions Function Categories Common Procedures Glossary Download Davinci Change Log News Mailing List Contact Developers davinci-dev [AT] mars.asu.edu All other topics See navigation on the left Major Sub-Functions asind atan2 sqrt Related Functions sph2cart math.dvrc cart2sph() Recent Library Changes Change Log Created On: 11-17-2009 Modified On: 11-17-2009