Create an iterator which generates a Bartlett-Hann pulse waveform.
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Create an iterator which generates a Bartlett-Hann pulse waveform.
A Bartlett-Hann pulse waveform is represented by the following equation
f(t; T, \tau, A, \varphi) = \begin{cases}A \biggl(0.62 - 0.48\biggl|\frac{t-\varphi}{\tau-1} - \frac{1}{2}\biggr| - 0.38\cos\frac{2\pi (t-\varphi)}{\tau-1}\biggr) & (t-\varphi) \mod T < \tau \\ 0 & \textrm{otherwise} \end{cases}
where T
is the pulse period, τ
is the pulse duration, A
is the amplitude, and φ
is the phase offset.
npm install @stdlib/simulate-iter-bartlett-hann-pulse
Alternatively,
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tag without installation and bundlers, use the ES Module available on the esm
branch (see README).deno
branch (see README for usage intructions).umd
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var iterBartlettHannPulse = require( '@stdlib/simulate-iter-bartlett-hann-pulse' );
Returns an iterator which generates a Bartlett-Hann pulse waveform.
var it = iterBartlettHannPulse();
// returns <Object>
var v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
// ...
The returned iterator protocol-compliant object has the following properties:
value
property and a done
property having a boolean
value indicating whether the iterator is finished.The function supports the following options
:
100
.2
. Default: options.period
.1.0
.0
.1e308
.By default, the function returns an iterator which generates a waveform that repeats every 100
iterations. To specify an alternative period, set the period
option.
var opts = {
'period': 10
};
var it = iterBartlettHannPulse( opts );
// returns <Object>
var v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
// ...
By default, the function returns an iterator which generates a waveform that has a duty cycle of 100%
(i.e., the waveform duration equals the waveform period). To specify an alternative duty cycle, set the duration
option. For example, to generate a waveform having a period of 10
iterations and a 50%
duty cycle,
var opts = {
'period': 10,
'duration': 5 // 5/10 = 0.50 => 50%
};
var it = iterBartlettHannPulse( opts );
// returns <Object>
var v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
// ...
To adjust at what point the iterator begins in the waveform cycle, set the phase offset
option. For example, to translate the waveform to the left,
var opts = {
'period': 10,
'duration': 5,
'offset': -7
};
var it = iterBartlettHannPulse( opts );
// returns <Object>
var v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
// ...
To translate the waveform to the right,
var opts = {
'period': 10,
'duration': 5,
'offset': 2
};
var it = iterBartlettHannPulse( opts );
// returns <Object>
var v = it.next().value;
// returns 0.0
v = it.next().value;
// returns 0.0
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
// ...
By default, the function returns an infinite iterator (i.e., an iterator which never ends). To limit the number of iterations, set the iter
option.
var opts = {
'iter': 2
};
var it = iterBartlettHannPulse( opts );
// returns <Object>
var v = it.next().value;
// returns <number>
v = it.next().value;
// returns <number>
var bool = it.next().done;
// returns true
Symbol.iterator
, the returned iterator is iterable.var iterBartlettHannPulse = require( '@stdlib/simulate-iter-bartlett-hann-pulse' );
// Create an iterator:
var opts = {
'period': 50,
'duration': 25,
'amplitude': 10.0,
'offset': -25,
'iter': 100
};
var it = iterBartlettHannPulse( opts );
// Perform manual iteration...
var v;
while ( true ) {
v = it.next();
if ( v.done ) {
break;
}
console.log( v.value );
}
@stdlib/simulate-iter/bartlett-pulse
: create an iterator which generates a Bartlett pulse waveform.
@stdlib/simulate-iter/hann-pulse
: create an iterator which generates a Hann pulse waveform.
@stdlib/simulate-iter/pulse
: create an iterator which generates a pulse waveform.
@stdlib/simulate-iter/triangle-wave
: create an iterator which generates a triangle wave.
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