Showing content from https://arrayfire.org/docs/group__signal__func__fft__r2c.htm below:
ArrayFire: fftR2C
Real to Complex Fast Fourier Transform. More...
template<int rank> array fftR2C (const array &in, const dim4 &dims, const double norm_factor=1.0) C++ Interface for real to complex fast fourier transform for one dimensional signals. More...
template<int rank> array fftR2C (const array &in, const double norm_factor=1.0) C++ Interface for real to complex fast fourier transform for one dimensional signals. More...
AFAPI af_err af_fft_r2c (af_array *out, const af_array in, const double norm_factor, const dim_t pad0) C Interface for real to complex fast fourier transform for one dimensional signals. More...
AFAPI af_err af_fft2_r2c (af_array *out, const af_array in, const double norm_factor, const dim_t pad0, const dim_t pad1) C Interface for real to complex fast fourier transform for two dimensional signals. More...
AFAPI af_err af_fft3_r2c (af_array *out, const af_array in, const double norm_factor, const dim_t pad0, const dim_t pad1, const dim_t pad2) C Interface for real to complex fast fourier transform for three dimensional signals. More...
Real to Complex Fast Fourier Transform.
◆ af_fft2_r2c()
C Interface for real to complex fast fourier transform for two dimensional signals.
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Parameters
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[out] out is a complex array containing the non redundant parts of
in. [in] in is a real array [in] norm_factor is the normalization factor with which the input is scaled after the transformation is applied [in] pad0 is the length of output signals along first dimension - used to either truncate/pad the input [in] pad1 is the length of output signals along second dimension - used to either truncate/pad the input
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Returns
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AF_SUCCESS if the fft transform is successful, otherwise an appropriate error code is returned.
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Note
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The first dimension of the output will be of size (pad0 / 2) + 1. The second dimension of the output will be pad1. The remaining dimensions are unchanged.
◆ af_fft3_r2c()
C Interface for real to complex fast fourier transform for three dimensional signals.
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Parameters
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[out] out is a complex array containing the non redundant parts of
in. [in] in is a real array [in] norm_factor is the normalization factor with which the input is scaled after the transformation is applied [in] pad0 is the length of output signals along first dimension - used to either truncate/pad the input [in] pad1 is the length of output signals along second dimension - used to either truncate/pad the input [in] pad2 is the length of output signals along third dimension - used to either truncate/pad the input
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Returns
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AF_SUCCESS if the fft transform is successful, otherwise an appropriate error code is returned.
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Note
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The first dimension of the output will be of size (pad0 / 2) + 1. The second dimension of the output will be pad1. The third dimension of the output will be pad 2.
◆ af_fft_r2c()
C Interface for real to complex fast fourier transform for one dimensional signals.
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Parameters
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[out] out is a complex array containing the non redundant parts of
in. [in] in is a real array [in] norm_factor is the normalization factor with which the input is scaled after the transformation is applied [in] pad0 is the length of output signals along first dimension - used to either truncate/pad the input
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Returns
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AF_SUCCESS if the fft transform is successful, otherwise an appropriate error code is returned.
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Note
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The first dimension of the output will be of size (pad0 / 2) + 1. The remaining dimensions are unchanged.
◆ fftR2C() [1/2] array fftR2C ( const array & in, const dim4 & dims, const double norm_factor = 1.0 )
C++ Interface for real to complex fast fourier transform for one dimensional signals.
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Parameters
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[in] in is a real array [in] dims is the requested padded dimensions before the transform is applied [in] norm_factor is the normalization factor with which the input is scaled after the transformation is applied
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Returns
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a complex array containing the non redundant parts of
in along the first dimension.
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Note
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The first dimension of the output will be of size (dims[0] / 2) + 1. The remaining dimensions are unchanged.
◆ fftR2C() [2/2] array fftR2C ( const array & in, const double norm_factor = 1.0 )
C++ Interface for real to complex fast fourier transform for one dimensional signals.
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Parameters
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[in] in is a real array [in] norm_factor is the normalization factor with which the input is scaled after the transformation is applied
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Returns
-
a complex array containing the non redundant parts of
in along the first dimension.
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Note
-
The first dimension of the output will be of size (in.dims(0) / 2) + 1. The remaining dimensions are unchanged.
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