Parameters (1) x+ (2) y+ (3) x- (4) y- ( 1) ( 2) ( 3) ( 4) 1.000 -0.032 0.036 -0.018 -0.032 1.000 -0.013 0.001 0.036 -0.013 1.000 0.023 -0.018 0.001 0.023 1.000