** Transform Cartesian coordinates to spherical. **

** [AZ,EL,R] = CART2SPH(X,Y,Z) transforms data stored in Cartesian **

** coordinates to spherical coordinates. If [M,N] = SIZE (X), then **

** Y and Z must be also be the same size. AZ and EL are in radians. **

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** See also CART2POL , SPH2CART , POL2CART . **

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