Struct ndrustfft::DctHandler
source · pub struct DctHandler<T> { /* private fields */ }
Expand description
§n-dimensional real-to-real Cosine Transform.
The dct transforms a real ndarray of size n to a real array of size n. The transformation is performed along a single axis, all other array dimensions are unaffected. Performs best on sizes where 2(n-1) is a mutiple of 2 or 3. The crate contains benchmarks, see benches folder, where different sizes can be tested to optmize performance.
The accompanying functions are nddct1
(serial) and
nddct1_par
(parallel).
§Example
2-Dimensional real-to-real dft along second axis
use ndarray::Array2;
use ndrustfft::{DctHandler, nddct1};
let (nx, ny) = (6, 4);
let mut data = Array2::<f64>::zeros((nx, ny));
let mut vhat = Array2::<f64>::zeros((nx, ny));
for (i, v) in data.iter_mut().enumerate() {
*v = i as f64;
}
let mut handler: DctHandler<f64> = DctHandler::new(ny);
nddct1(&data, &mut vhat, &mut handler, 1);
Implementations§
source§impl<T: FftNum + FloatConst> DctHandler<T>
impl<T: FftNum + FloatConst> DctHandler<T>
sourcepub fn normalization(self, norm: Normalization<T>) -> Self
pub fn normalization(self, norm: Normalization<T>) -> Self
This method allows modifying the normalization applied to the backward transform. See Normalization
for more details.
Trait Implementations§
source§impl<T: Clone> Clone for DctHandler<T>
impl<T: Clone> Clone for DctHandler<T>
source§fn clone(&self) -> DctHandler<T>
fn clone(&self) -> DctHandler<T>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreAuto Trait Implementations§
impl<T> Freeze for DctHandler<T>
impl<T> !RefUnwindSafe for DctHandler<T>
impl<T> Send for DctHandler<T>
impl<T> Sync for DctHandler<T>
impl<T> Unpin for DctHandler<T>
impl<T> !UnwindSafe for DctHandler<T>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more