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lib/node_modules/@stdlib/stats/base/dnanmean/README.md

Lines changed: 29 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -72,26 +72,28 @@ The function has the following parameters:
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The `N` and stride parameters determine which elements in `x` are accessed at runtime. For example, to compute the [arithmetic mean][arithmetic-mean] of every other element in `x`,
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75+
<!-- eslint-disable max-len -->
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```javascript
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var Float64Array = require( '@stdlib/array/float64' );
7779

78-
var x = new Float64Array( [ 1.0, 2.0, 2.0, -7.0, -2.0, 3.0, 4.0, 2.0, NaN ] );
80+
var x = new Float64Array( [ 1.0, 2.0, 2.0, -7.0, -2.0, 3.0, 4.0, 2.0, NaN, NaN ] );
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80-
var v = dnanmean( 4, x, 2 );
82+
var v = dnanmean( 5, x, 2 );
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// returns 1.25
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```
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Note that indexing is relative to the first index. To introduce an offset, use [`typed array`][mdn-typed-array] views.
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<!-- eslint-disable stdlib/capitalized-comments -->
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<!-- eslint-disable stdlib/capitalized-comments, max-len -->
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```javascript
8991
var Float64Array = require( '@stdlib/array/float64' );
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91-
var x0 = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN ] );
93+
var x0 = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN, NaN ] );
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var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
9395

94-
var v = dnanmean( 4, x1, 2 );
96+
var v = dnanmean( 5, x1, 2 );
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// returns 1.25
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```
9799

@@ -114,12 +116,14 @@ The function has the following additional parameters:
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While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying buffer, the offset parameter supports indexing semantics based on a starting index. For example, to calculate the [arithmetic mean][arithmetic-mean] for every other element in `x` starting from the second element
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<!-- eslint-disable max-len -->
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```javascript
118122
var Float64Array = require( '@stdlib/array/float64' );
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120-
var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN ] );
124+
var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN, NaN ] );
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122-
var v = dnanmean.ndarray( 4, x, 2, 1 );
126+
var v = dnanmean.ndarray( 5, x, 2, 1 );
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// returns 1.25
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```
125129

@@ -171,6 +175,22 @@ console.log( v );
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<!-- /.examples -->
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<!-- C interface documentation. -->
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* * *
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<section class="c">
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## C APIs
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<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
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<section class="intro">
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</section>
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<!-- /.intro -->
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<!-- C usage documentation. -->
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<section class="usage">
@@ -189,7 +209,7 @@ Computes the arithmetic mean of a double-precision floating-point strided array,
189209
const double x[] = { 1.0, 2.0, 0.0/0.0, 3.0, 0.0/0.0, 4.0, 5.0, 6.0, 0.0/0.0, 7.0, 8.0, 0.0/0.0 };
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double v = stdlib_strided_dnanmean( 6, x, 2 );
192-
// returns 4.66
212+
// returns ~4.6667
193213
```
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The function accepts the following arguments:
@@ -210,7 +230,7 @@ Computes the arithmetic mean of a double-precision floating-point strided array,
210230
const double x[] = { 1.0, 2.0, 0.0/0.0, 3.0, 0.0/0.0, 4.0, 5.0, 6.0, 0.0/0.0, 7.0, 8.0, 0.0/0.0 };
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double v = stdlib_strided_dnanmean_ndarray( 6, x, 2, 0 );
213-
// returns 4.66
233+
// returns ~4.6667
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```
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The function accepts the following arguments:

lib/node_modules/@stdlib/stats/base/dnanmean/benchmark/benchmark.js

Lines changed: 3 additions & 3 deletions
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@@ -33,13 +33,13 @@ var dnanmean = require( './../lib/dnanmean.js' );
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// FUNCTIONS //
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/**
36-
* Returns a random value or `NaN`.
36+
* Returns a random number.
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*
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* @private
39-
* @returns {number} random number or `NaN`
39+
* @returns {number} random number
4040
*/
4141
function rand() {
42-
if ( bernoulli( 0.2 ) ) {
42+
if ( bernoulli( 0.8 ) < 1 ) {
4343
return NaN;
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}
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return uniform( -10.0, 10.0 );

lib/node_modules/@stdlib/stats/base/dnanmean/benchmark/benchmark.native.js

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@@ -42,13 +42,13 @@ var opts = {
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// FUNCTIONS //
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/**
45-
* Returns a random value or `NaN`.
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* Returns a random number.
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*
4747
* @private
48-
* @returns {number} random number or `NaN`
48+
* @returns {number} random number
4949
*/
5050
function rand() {
51-
if ( bernoulli( 0.2 ) ) {
51+
if ( bernoulli( 0.8 ) < 1 ) {
5252
return NaN;
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}
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return uniform( -10.0, 10.0 );

lib/node_modules/@stdlib/stats/base/dnanmean/benchmark/benchmark.ndarray.js

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@@ -33,13 +33,13 @@ var dnanmean = require( './../lib/ndarray.js' );
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// FUNCTIONS //
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/**
36-
* Returns a random value or `NaN`.
36+
* Returns a random number.
3737
*
3838
* @private
39-
* @returns {number} random number or `NaN`
39+
* @returns {number} random number
4040
*/
4141
function rand() {
42-
if ( bernoulli( 0.2 ) ) {
42+
if ( bernoulli( 0.8 ) < 1 ) {
4343
return NaN;
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}
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return uniform( -10.0, 10.0 );

lib/node_modules/@stdlib/stats/base/dnanmean/benchmark/benchmark.ndarray.native.js

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@@ -42,13 +42,13 @@ var opts = {
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// FUNCTIONS //
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/**
45-
* Returns a random value or `NaN`.
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* Returns a random number.
4646
*
4747
* @private
48-
* @returns {number} random number or `NaN`
48+
* @returns {number} random number
4949
*/
5050
function rand() {
51-
if ( bernoulli( 0.2 ) ) {
51+
if ( bernoulli( 0.8 ) < 1 ) {
5252
return NaN;
5353
}
5454
return uniform( -10.0, 10.0 );

lib/node_modules/@stdlib/stats/base/dnanmean/benchmark/c/benchmark.length.c

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@@ -102,7 +102,11 @@ static double benchmark1( int iterations, int len ) {
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int i;
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104104
for ( i = 0; i < len; i++ ) {
105-
x[ i ] = ( rand_double() * 20000.0 ) - 10000.0;
105+
if ( rand_double() < 0.2 ) {
106+
x[ i ] = 0.0 / 0.0; // NaN
107+
} else {
108+
x[ i ] = ( rand_double()* 20000.0 ) - 10000.0;
109+
}
106110
}
107111
v = 0.0;
108112
t = tic();
@@ -136,7 +140,11 @@ static double benchmark2( int iterations, int len ) {
136140
int i;
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138142
for ( i = 0; i < len; i++ ) {
139-
x[ i ] = ( rand_double() * 20000.0 ) - 10000.0;
143+
if ( rand_double() < 0.2 ) {
144+
x[ i ] = 0.0 / 0.0; // NaN
145+
} else {
146+
x[ i ] = ( rand_double()* 20000.0 ) - 10000.0;
147+
}
140148
}
141149
v = 0.0;
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t = tic();

lib/node_modules/@stdlib/stats/base/dnanmean/docs/repl.txt

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@@ -37,14 +37,14 @@
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~0.3333
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// Using `N` and `stride` parameters:
40-
> x = new {{alias:@stdlib/array/float64}}( [ -2.0, 1.0, 1.0, -5.0, 2.0, -1.0, NaN ] );
41-
> {{alias}}( 3, x, 2 )
40+
> x = new {{alias:@stdlib/array/float64}}( [ -2.0, 1.0, 1.0, -5.0, 2.0, -1.0, NaN, NaN ] );
41+
> {{alias}}( 4, x, 2 )
4242
~0.3333
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4444
// Using view offsets:
45-
> var x0 = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, NaN ] );
45+
> var x0 = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, NaN, NaN ] );
4646
> var x1 = new {{alias:@stdlib/array/float64}}( x0.buffer, x0.BYTES_PER_ELEMENT*1 );
47-
> {{alias}}( 3, x1,2 )
47+
> {{alias}}( 4, x1,2 )
4848
~-0.3333
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5050

@@ -83,8 +83,8 @@
8383
~0.3333
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8585
// Using offset parameter:
86-
> var x = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, NaN ] );
87-
> {{alias}}.ndarray( 3, x, 2, 1 )
86+
> var x = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, NaN, NaN ] );
87+
> {{alias}}.ndarray( 4, x, 2, 1 )
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~-0.3333
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See Also

lib/node_modules/@stdlib/stats/base/dnanmean/lib/index.js

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3636
* var Float64Array = require( '@stdlib/array/float64' );
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* var dnanmean = require( '@stdlib/stats/base/dnanmean' );
3838
*
39-
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN ] );
39+
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN, NaN ] );
4040
*
41-
* var v = dnanmean.ndarray( 4, x, 2, 1 );
41+
* var v = dnanmean.ndarray( 5, x, 2, 1 );
4242
* // returns 1.25
4343
*/
4444

lib/node_modules/@stdlib/stats/base/dnanmean/lib/ndarray.js

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Original file line numberDiff line numberDiff line change
@@ -37,9 +37,9 @@ var dnanmeanpn = require( '@stdlib/stats/base/dnanmeanpn' ).ndarray;
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* @example
3838
* var Float64Array = require( '@stdlib/array/float64' );
3939
*
40-
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN ] );
40+
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN, NaN ] );
4141
*
42-
* var v = dnanmean( 4, x, 2, 1 );
42+
* var v = dnanmean( 5, x, 2, 1 );
4343
* // returns 1.25
4444
*/
4545
function dnanmean( N, x, strideX, offsetX ) {

lib/node_modules/@stdlib/stats/base/dnanmean/lib/ndarray.native.js

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Original file line numberDiff line numberDiff line change
@@ -37,9 +37,9 @@ var addon = require( './../src/addon.node' );
3737
* @example
3838
* var Float64Array = require( '@stdlib/array/float64' );
3939
*
40-
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN ] );
40+
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, NaN, NaN ] );
4141
*
42-
* var v = dnanmean( 4, x, 2, 1 );
42+
* var v = dnanmean( 5, x, 2, 1 );
4343
* // returns 1.25
4444
*/
4545
function dnanmean( N, x, strideX, offsetX ) {

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