Struct audio_processor_testing_helpers::charts::Histogram
source · pub struct Histogram<'a, BR, A, Tag = Vertical>{ /* private fields */ }
Expand description
Presents data in a histogram. Input data can be raw or aggregated.
Examples
use plotters::prelude::*;
let data = [1, 1, 2, 2, 1, 3, 3, 2, 2, 1, 1, 2, 2, 2, 3, 3, 1, 2, 3];
let drawing_area = SVGBackend::new("histogram_vertical.svg", (300, 200)).into_drawing_area();
drawing_area.fill(&WHITE).unwrap();
let mut chart_builder = ChartBuilder::on(&drawing_area);
chart_builder.margin(5).set_left_and_bottom_label_area_size(20);
let mut chart_context = chart_builder.build_cartesian_2d((1..3).into_segmented(), 0..9).unwrap();
chart_context.configure_mesh().draw().unwrap();
chart_context.draw_series(Histogram::vertical(&chart_context).style(BLUE.filled()).margin(10)
.data(data.map(|x| (x, 1)))).unwrap();
The result is a histogram counting the occurrences of 1, 2, and 3 in data
:
Here is a variation with Histogram::horizontal()
, replacing (1..3).into_segmented(), 0..9
with
0..9, (1..3).into_segmented()
:
The spacing between histogram bars is adjusted with Histogram::margin()
.
Here is a version of the figure where .margin(10)
has been replaced by .margin(20)
;
the resulting bars are narrow and more spaced:
crate::coord::ranged1d::IntoSegmentedCoord::into_segmented()
is useful for discrete data; it makes sure the histogram bars
are centered on each data value. Here is another variation with (1..3).into_segmented()
replaced by 1..4
:
Histogram::style()
sets the style of the bars. Here is a histogram without .filled()
:
The following version uses Histogram::style_func()
for finer control. Let’s replace .style(BLUE.filled())
with
.style_func(|x, _bar_height| if let SegmentValue::Exact(v) = x {[BLACK, RED, GREEN, BLUE][*v as usize].filled()} else {BLACK.filled()})
.
The resulting bars come in different colors:
Histogram::baseline()
adjusts the base of the bars. The following figure adds .baseline(1)
to the right of .margin(10)
. The lower portion of the bars are removed:
The following figure uses Histogram::baseline_func()
for finer control. Let’s add
.baseline_func(|x| if let SegmentValue::Exact(v) = x {*v as i32} else {0})
to the right of .margin(10)
. The lower portion of the bars are removed; the removed portion is taller
to the right:
Implementations§
source§impl<'a, BR, A, Tag> Histogram<'a, BR, A, Tag>
impl<'a, BR, A, Tag> Histogram<'a, BR, A, Tag>
sourcepub fn style<S>(self, style: S) -> Histogram<'a, BR, A, Tag> ⓘwhere
S: Into<ShapeStyle>,
pub fn style<S>(self, style: S) -> Histogram<'a, BR, A, Tag> ⓘwhere
S: Into<ShapeStyle>,
Sets the style of the histogram bars.
See Histogram
for more information and examples.
sourcepub fn style_func(
self,
style_func: impl Fn(&<BR as Ranged>::ValueType, &A) -> ShapeStyle + 'a
) -> Histogram<'a, BR, A, Tag> ⓘ
pub fn style_func( self, style_func: impl Fn(&<BR as Ranged>::ValueType, &A) -> ShapeStyle + 'a ) -> Histogram<'a, BR, A, Tag> ⓘ
Sets the style of histogram using a closure.
The closure takes the position of the bar in guest coordinates as argument.
The argument may need some processing if the data range has been transformed by
crate::coord::ranged1d::IntoSegmentedCoord::into_segmented()
as shown in the Histogram
example.
sourcepub fn baseline(self, baseline: A) -> Histogram<'a, BR, A, Tag> ⓘwhere
A: Clone,
pub fn baseline(self, baseline: A) -> Histogram<'a, BR, A, Tag> ⓘwhere
A: Clone,
Sets the baseline of the histogram.
See Histogram
for more information and examples.
sourcepub fn baseline_func(
self,
func: impl Fn(&<BR as Ranged>::ValueType) -> A + 'a
) -> Histogram<'a, BR, A, Tag> ⓘ
pub fn baseline_func( self, func: impl Fn(&<BR as Ranged>::ValueType) -> A + 'a ) -> Histogram<'a, BR, A, Tag> ⓘ
Sets the histogram bar baselines using a closure.
The closure takes the bar position and height as argument.
The argument may need some processing if the data range has been transformed by
crate::coord::ranged1d::IntoSegmentedCoord::into_segmented()
as shown in the Histogram
example.
source§impl<'a, BR, A> Histogram<'a, BR, A>
impl<'a, BR, A> Histogram<'a, BR, A>
sourcepub fn vertical<ACoord, DB>(
parent: &ChartContext<'_, DB, Cartesian2d<BR, ACoord>>
) -> Histogram<'a, BR, A> ⓘwhere
DB: DrawingBackend + 'a,
ACoord: Ranged<ValueType = A>,
pub fn vertical<ACoord, DB>(
parent: &ChartContext<'_, DB, Cartesian2d<BR, ACoord>>
) -> Histogram<'a, BR, A> ⓘwhere
DB: DrawingBackend + 'a,
ACoord: Ranged<ValueType = A>,
Creates a vertical histogram.
See Histogram
for more information and examples.
source§impl<'a, BR, A> Histogram<'a, BR, A, Horizontal>
impl<'a, BR, A> Histogram<'a, BR, A, Horizontal>
sourcepub fn horizontal<ACoord, DB>(
parent: &ChartContext<'_, DB, Cartesian2d<ACoord, BR>>
) -> Histogram<'a, BR, A, Horizontal> ⓘwhere
DB: DrawingBackend,
ACoord: Ranged<ValueType = A>,
pub fn horizontal<ACoord, DB>(
parent: &ChartContext<'_, DB, Cartesian2d<ACoord, BR>>
) -> Histogram<'a, BR, A, Horizontal> ⓘwhere
DB: DrawingBackend,
ACoord: Ranged<ValueType = A>,
Creates a horizontal histogram.
See Histogram
for more information and examples.
Trait Implementations§
source§impl<'a, BR, A> Iterator for Histogram<'a, BR, A>
impl<'a, BR, A> Iterator for Histogram<'a, BR, A>
source§fn next(&mut self) -> Option<<Histogram<'a, BR, A> as Iterator>::Item>
fn next(&mut self) -> Option<<Histogram<'a, BR, A> as Iterator>::Item>
source§fn next_chunk<const N: usize>(
&mut self
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
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&mut self
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
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fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
1.36.0 · source§fn copied<'a, T>(self) -> Copied<Self>
fn copied<'a, T>(self) -> Copied<Self>
source§fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>where
Self: Sized,
fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>where
Self: Sized,
iter_array_chunks
)N
elements of the iterator at a time. Read more1.11.0 · source§fn product<P>(self) -> P
fn product<P>(self) -> P
source§fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
iter_order_by
)Iterator
with those
of another with respect to the specified comparison function. Read more1.5.0 · source§fn partial_cmp<I>(self, other: I) -> Option<Ordering>
fn partial_cmp<I>(self, other: I) -> Option<Ordering>
PartialOrd
elements of
this Iterator
with those of another. The comparison works like short-circuit
evaluation, returning a result without comparing the remaining elements.
As soon as an order can be determined, the evaluation stops and a result is returned. Read moresource§fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
iter_order_by
)Iterator
with those
of another with respect to the specified comparison function. Read moresource§fn eq_by<I, F>(self, other: I, eq: F) -> bool
fn eq_by<I, F>(self, other: I, eq: F) -> bool
iter_order_by
)1.5.0 · source§fn lt<I>(self, other: I) -> bool
fn lt<I>(self, other: I) -> bool
Iterator
are lexicographically
less than those of another. Read more1.5.0 · source§fn le<I>(self, other: I) -> bool
fn le<I>(self, other: I) -> bool
Iterator
are lexicographically
less or equal to those of another. Read more1.5.0 · source§fn gt<I>(self, other: I) -> bool
fn gt<I>(self, other: I) -> bool
Iterator
are lexicographically
greater than those of another. Read more1.5.0 · source§fn ge<I>(self, other: I) -> bool
fn ge<I>(self, other: I) -> bool
Iterator
are lexicographically
greater than or equal to those of another. Read moresource§fn is_sorted_by<F>(self, compare: F) -> bool
fn is_sorted_by<F>(self, compare: F) -> bool
is_sorted
)source§fn is_sorted_by_key<F, K>(self, f: F) -> bool
fn is_sorted_by_key<F, K>(self, f: F) -> bool
is_sorted
)