Skip to content

Commit 0f54105

Browse files
anandkaranubcstdlib-bot
anandkaranubc
and
stdlib-bot
authored
feat: add C implementation for stats/base/dists/degenerate/pmf
PR-URL: #4586 Closes: #3545 Co-authored-by: stdlib-bot <[email protected]> Reviewed-by: Philipp Burckhardt <[email protected]>
1 parent 225b73b commit 0f54105

File tree

17 files changed

+1262
-2
lines changed

17 files changed

+1262
-2
lines changed

‎lib/node_modules/@stdlib/stats/base/dists/degenerate/pmf/README.md

Lines changed: 96 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -97,6 +97,102 @@ for ( i = 0; i < 100; i++ ) {
9797

9898
<!-- /.examples -->
9999

100+
<!-- C interface documentation. -->
101+
102+
* * *
103+
104+
<section class="c">
105+
106+
## C APIs
107+
108+
<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
109+
110+
<section class="intro">
111+
112+
</section>
113+
114+
<!-- /.intro -->
115+
116+
<!-- C usage documentation. -->
117+
118+
<section class="usage">
119+
120+
### Usage
121+
122+
```c
123+
#include "stdlib/stats/base/dists/degenerate/pmf.h"
124+
```
125+
126+
#### stdlib_base_dists_degenerate_pmf( x, mu )
127+
128+
Evaluates the [PMF][pmf] of a [degenerate distribution][degenerate-distribution] centered at `mu`.
129+
130+
```c
131+
double out = stdlib_base_dists_degenerate_pmf( 2.0, 3.0 );
132+
// returns 0.0
133+
```
134+
135+
The function accepts the following arguments:
136+
137+
- **x**: `[in] double` input value.
138+
- **mu**: `[in] double` constant value of the distribution.
139+
140+
```c
141+
double stdlib_base_dists_degenerate_pmf( const double x, const double mu );
142+
```
143+
144+
</section>
145+
146+
<!-- /.usage -->
147+
148+
<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
149+
150+
<section class="notes">
151+
152+
</section>
153+
154+
<!-- /.notes -->
155+
156+
<!-- C API usage examples. -->
157+
158+
<section class="examples">
159+
160+
### Examples
161+
162+
```c
163+
#include "stdlib/stats/base/dists/degenerate/pmf.h"
164+
#include "stdlib/math/base/special/round.h"
165+
#include <stdlib.h>
166+
#include <stdio.h>
167+
168+
static double random_uniform( const double min, const double max ) {
169+
double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
170+
return min + ( v * ( max - min ) );
171+
}
172+
173+
int main( void ) {
174+
double result;
175+
double mu;
176+
double x;
177+
int i;
178+
179+
for ( i = 0; i < 10; i++ ) {
180+
x = stdlib_base_round( random_uniform( 0.0, 5.0 ) );
181+
mu = stdlib_base_round( random_uniform( 0.0, 5.0 ) );
182+
result = stdlib_base_dists_degenerate_pmf( x, mu );
183+
printf( "x: %lf, µ: %lf, P(X=x;µ): %lf \n", x, mu, result );
184+
}
185+
}
186+
```
187+
188+
</section>
189+
190+
<!-- /.examples -->
191+
192+
</section>
193+
194+
<!-- /.c -->
195+
100196
<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
101197

102198
<section class="related">

‎lib/node_modules/@stdlib/stats/base/dists/degenerate/pmf/benchmark/benchmark.js

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -23,6 +23,7 @@
2323
var bench = require( '@stdlib/bench' );
2424
var ceil = require( '@stdlib/math/base/special/ceil' );
2525
var randu = require( '@stdlib/random/base/randu' );
26+
var uniform = require( '@stdlib/random/base/uniform' );
2627
var isnan = require( '@stdlib/math/base/assert/is-nan' );
2728
var pkg = require( './../package.json' ).name;
2829
var pmf = require( './../lib' );
@@ -38,8 +39,8 @@ bench( pkg, function benchmark( b ) {
3839

3940
b.tic();
4041
for ( i = 0; i < b.iterations; i++ ) {
41-
x = ceil( ( randu()*100.0 ) - 100.0 );
42-
mu = ( randu()*100.0 ) - 50.0;
42+
x = ceil( uniform( -100.0, 0.0 ) );
43+
mu = uniform( -50.0, 50.0 );
4344
y = pmf( x, mu );
4445
if ( isnan( y ) ) {
4546
b.fail( 'should not return NaN' );

‎lib/node_modules/@stdlib/stats/base/dists/degenerate/pmf/benchmark/benchmark.native.js

Lines changed: 71 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,71 @@
1+
/**
2+
* @license Apache-2.0
3+
*
4+
* Copyright (c) 2025 The Stdlib Authors.
5+
*
6+
* Licensed under the Apache License, Version 2.0 (the "License");
7+
* you may not use this file except in compliance with the License.
8+
* You may obtain a copy of the License at
9+
*
10+
* http://www.apache.org/licenses/LICENSE-2.0
11+
*
12+
* Unless required by applicable law or agreed to in writing, software
13+
* distributed under the License is distributed on an "AS IS" BASIS,
14+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15+
* See the License for the specific language governing permissions and
16+
* limitations under the License.
17+
*/
18+
19+
'use strict';
20+
21+
// MODULES //
22+
23+
var resolve = require( 'path' ).resolve;
24+
var bench = require( '@stdlib/bench' );
25+
var Float64Array = require( '@stdlib/array/float64' );
26+
var ceil = require( '@stdlib/math/base/special/ceil' );
27+
var uniform = require( '@stdlib/random/base/uniform' );
28+
var isnan = require( '@stdlib/math/base/assert/is-nan' );
29+
var tryRequire = require( '@stdlib/utils/try-require' );
30+
var pkg = require( './../package.json' ).name;
31+
32+
33+
// VARIABLES //
34+
35+
var pmf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
36+
var opts = {
37+
'skip': ( pmf instanceof Error )
38+
};
39+
40+
41+
// MAIN //
42+
43+
bench( pkg+'::native', opts, function benchmark( b ) {
44+
var len;
45+
var mu;
46+
var x;
47+
var y;
48+
var i;
49+
50+
len = 100;
51+
x = new Float64Array( len );
52+
mu = new Float64Array( len );
53+
for ( i = 0; i < len; i++ ) {
54+
x[ i ] = ceil( uniform( -100.0, 0.0 ) );
55+
mu[ i ] = uniform( -50.0, 50.0 );
56+
}
57+
58+
b.tic();
59+
for ( i = 0; i < b.iterations; i++ ) {
60+
y = pmf( x[ i % len ], mu[ i % len ] );
61+
if ( isnan( y ) ) {
62+
b.fail( 'should not return NaN' );
63+
}
64+
}
65+
b.toc();
66+
if ( isnan( y ) ) {
67+
b.fail( 'should not return NaN' );
68+
}
69+
b.pass( 'benchmark finished' );
70+
b.end();
71+
});

‎lib/node_modules/@stdlib/stats/base/dists/degenerate/pmf/benchmark/c/Makefile

Lines changed: 146 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,146 @@
1+
#/
2+
# @license Apache-2.0
3+
#
4+
# Copyright (c) 2025 The Stdlib Authors.
5+
#
6+
# Licensed under the Apache License, Version 2.0 (the "License");
7+
# you may not use this file except in compliance with the License.
8+
# You may obtain a copy of the License at
9+
#
10+
# http://www.apache.org/licenses/LICENSE-2.0
11+
#
12+
# Unless required by applicable law or agreed to in writing, software
13+
# distributed under the License is distributed on an "AS IS" BASIS,
14+
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15+
# See the License for the specific language governing permissions and
16+
# limitations under the License.
17+
#/
18+
19+
# VARIABLES #
20+
21+
ifndef VERBOSE
22+
QUIET := @
23+
else
24+
QUIET :=
25+
endif
26+
27+
# Determine the OS ([1][1], [2][2]).
28+
#
29+
# [1]: https://en.wikipedia.org/wiki/Uname#Examples
30+
# [2]: http://stackoverflow.com/a/27776822/2225624
31+
OS ?= $(shell uname)
32+
ifneq (, $(findstring MINGW,$(OS)))
33+
OS := WINNT
34+
else
35+
ifneq (, $(findstring MSYS,$(OS)))
36+
OS := WINNT
37+
else
38+
ifneq (, $(findstring CYGWIN,$(OS)))
39+
OS := WINNT
40+
else
41+
ifneq (, $(findstring Windows_NT,$(OS)))
42+
OS := WINNT
43+
endif
44+
endif
45+
endif
46+
endif
47+
48+
# Define the program used for compiling C source files:
49+
ifdef C_COMPILER
50+
CC := $(C_COMPILER)
51+
else
52+
CC := gcc
53+
endif
54+
55+
# Define the command-line options when compiling C files:
56+
CFLAGS ?= \
57+
-std=c99 \
58+
-O3 \
59+
-Wall \
60+
-pedantic
61+
62+
# Determine whether to generate position independent code ([1][1], [2][2]).
63+
#
64+
# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
65+
# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
66+
ifeq ($(OS), WINNT)
67+
fPIC ?=
68+
else
69+
fPIC ?= -fPIC
70+
endif
71+
72+
# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
73+
INCLUDE ?=
74+
75+
# List of source files:
76+
SOURCE_FILES ?=
77+
78+
# List of libraries (e.g., `-lopenblas -lpthread`):
79+
LIBRARIES ?=
80+
81+
# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
82+
LIBPATH ?=
83+
84+
# List of C targets:
85+
c_targets := benchmark.out
86+
87+
88+
# RULES #
89+
90+
#/
91+
# Compiles source files.
92+
#
93+
# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
94+
# @param {string} [CFLAGS] - C compiler options
95+
# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
96+
# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
97+
# @param {string} [SOURCE_FILES] - list of source files
98+
# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
99+
# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
100+
#
101+
# @example
102+
# make
103+
#
104+
# @example
105+
# make all
106+
#/
107+
all: $(c_targets)
108+
109+
.PHONY: all
110+
111+
#/
112+
# Compiles C source files.
113+
#
114+
# @private
115+
# @param {string} CC - C compiler (e.g., `gcc`)
116+
# @param {string} CFLAGS - C compiler options
117+
# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
118+
# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
119+
# @param {string} SOURCE_FILES - list of source files
120+
# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
121+
# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
122+
#/
123+
$(c_targets): %.out: %.c
124+
$(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
125+
126+
#/
127+
# Runs compiled benchmarks.
128+
#
129+
# @example
130+
# make run
131+
#/
132+
run: $(c_targets)
133+
$(QUIET) ./$<
134+
135+
.PHONY: run
136+
137+
#/
138+
# Removes generated files.
139+
#
140+
# @example
141+
# make clean
142+
#/
143+
clean:
144+
$(QUIET) -rm -f *.o *.out
145+
146+
.PHONY: clean

0 commit comments

Comments
 (0)