Function fearrso_extract_im# Defined in File sparse/array/gauss/base.h Function Documentation# fearrso_t fearrso_extract_im(imdir_t idx, ord_t order, fearrso_t *arr, dhelpl_t dhl)# Imaginary derivative extractors. Parameters: idx – [in] Imagianry index. order – [in] Imagianry index. arr – [in] Gauss array. res – [in] Gauss array, result. dhl – [in] Direction helper list.