# Absolute and negation functions Compute the absolute or negated value of each element in a vector. ## Topics ### Vector absolute functions [`static func absolute(U) -> [Float]`](/documentation/Accelerate/vDSP/absolute(_:)-5ehc1) Returns the absolute value of each element in the supplied single-precision vector. [`static func absolute(U) -> [Double]`](/documentation/Accelerate/vDSP/absolute(_:)-9c3ge) Returns the absolute value of each element in the supplied double-precision vector. [`static func absolute(U, result: inout V)`](/documentation/Accelerate/vDSP/absolute(_:result:)-4pigo) Calculates the absolute value of each element in the supplied single-precision vector. [`static func absolute(U, result: inout V)`](/documentation/Accelerate/vDSP/absolute(_:result:)-657bd) Calculates the absolute value of each element in the supplied double-precision vector. [`extern void vDSP_vabsi(const int *__A, vDSP_Stride __IA, int *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vabsi) Calculates the absolute value of each element in the supplied integer vector using the specified stride. [`extern void vDSP_vabs(const float *__A, vDSP_Stride __IA, float *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vabs) Calculates the absolute value of each element in the supplied single-precision vector using the specified stride. [`extern void vDSP_vabsD(const double *__A, vDSP_Stride __IA, double *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vabsD) Calculates the absolute value of each element in the supplied double-precision vector using the specified stride. ### Complex vector absolute functions [`static func absolute(DSPSplitComplex, result: inout V)`](/documentation/Accelerate/vDSP/absolute(_:result:)-9x5jn) Calculates the absolute value of each element in the supplied single-precision complex vector. [`static func absolute(DSPDoubleSplitComplex, result: inout V)`](/documentation/Accelerate/vDSP/absolute(_:result:)-1wu9x) Calculates the absolute value of each element in the supplied double-precision complex vector. [`extern void vDSP_zvabs(const DSPSplitComplex *__A, vDSP_Stride __IA, float *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zvabs) Calculates the absolute value of each element in the supplied single-precision complex vector using the specified stride. [`extern void vDSP_zvabsD(const DSPDoubleSplitComplex *__A, vDSP_Stride __IA, double *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zvabsD) Calculates the absolute value of each element in the supplied double-precision complex vector using the specified stride. ### Vector negative absolute functions [`static func negativeAbsolute(U) -> [Float]`](/documentation/Accelerate/vDSP/negativeAbsolute(_:)-66a7a) Returns the negative absolute value of each element in the supplied single-precision vector. [`static func negativeAbsolute(U) -> [Double]`](/documentation/Accelerate/vDSP/negativeAbsolute(_:)-1b5m6) Returns the negative absolute value of each element in the supplied double-precision vector. [`static func negativeAbsolute(U, result: inout V)`](/documentation/Accelerate/vDSP/negativeAbsolute(_:result:)-85gj0) Calculates the negative absolute value of each element in the supplied single-precision vector. [`static func negativeAbsolute(U, result: inout V)`](/documentation/Accelerate/vDSP/negativeAbsolute(_:result:)-1gpcy) Calculates the negative absolute value of each element in the supplied double-precision vector. [`extern void vDSP_vnabs(const float *__A, vDSP_Stride __IA, float *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vnabs) Calculates the negative absolute value of each element in the supplied single-precision vector using the specified stride. [`extern void vDSP_vnabsD(const double *__A, vDSP_Stride __IA, double *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vnabsD) Calculates the negative absolute value of each element in the supplied double-precision vector using the specified stride. ### Vector negation functions [`static func negative(U) -> [Float]`](/documentation/Accelerate/vDSP/negative(_:)-8mo1p) Returns the negative value of each element in the supplied single-precision vector. [`static func negative(U) -> [Double]`](/documentation/Accelerate/vDSP/negative(_:)-24oe4) Returns the negative value of each element in the supplied double-precision vector. [`static func negative(U, result: inout V)`](/documentation/Accelerate/vDSP/negative(_:result:)-92caw) Calculates the negative value of each element in the supplied single-precision vector. [`static func negative(U, result: inout V)`](/documentation/Accelerate/vDSP/negative(_:result:)-5bwqv) Calculates the negative value of each element in the supplied double-precision vector. [`extern void vDSP_vneg(const float *__A, vDSP_Stride __IA, float *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vneg) Calculates the negative value of each element in the supplied single-precision vector using the specified stride. [`extern void vDSP_vnegD(const double *__A, vDSP_Stride __IA, double *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vnegD) Calculates the negative value of each element in the supplied double-precision vector using specified stride. ### Complex vector negation functions [`extern void vDSP_zvneg(const DSPSplitComplex *__A, vDSP_Stride __IA, const DSPSplitComplex *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zvneg) Calculates the negative value of each element in the supplied complex single-precision vector. [`extern void vDSP_zvnegD(const DSPDoubleSplitComplex *__A, vDSP_Stride __IA, const DSPDoubleSplitComplex *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zvnegD) Calculates the negative value of each element in the supplied complex double-precision vector. --- Copyright © 2026 Apple Inc. 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