+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 +59 +60 +61 +62 +63 +64 +65 +66 +67 +68 +69 +70 +71 +72 +73 +74 +75 +76 +77 +78 +79 +80 +81 +82 +83 +84 +85 +86 +87 +88 +89 +90 | 3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3x +3008x +3008x +3008x +3x +3x +3008x +2x +2x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +3003x +1x +1x +3003x +1x +1x +3001x +3003x +3003x +3008x +3x +3x +3x +3x +3x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2018 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var constantFunction = require( '@stdlib/utils/constant-function' );
+var degenerate = require( '@stdlib/stats/base/dists/degenerate/logcdf' ).factory;
+var expm1 = require( '@stdlib/math/base/special/expm1' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var log1p = require( '@stdlib/math/base/special/log1p' );
+var exp = require( '@stdlib/math/base/special/exp' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var ln = require( '@stdlib/math/base/special/ln' );
+var LNHALF = require( '@stdlib/constants/float64/ln-half' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+
+
+// MAIN //
+
+/**
+* Returns a function for evaluating the logarithm of the cumulative distribution function (CDF) for a Rayleigh distribution with scale parameter `sigma`.
+*
+* @param {NonNegativeNumber} sigma - scale parameter
+* @returns {Function} logCDF
+*
+* @example
+* var logcdf = factory( 2.0 );
+* var y = logcdf( 3.0 );
+* // returns ~-0.393
+*
+* y = logcdf( 1.0 );
+* // returns ~-2.141
+*/
+function factory( sigma ) {
+ var s2;
+ if ( isnan( sigma ) || sigma < 0.0 ) {
+ return constantFunction( NaN );
+ }
+ if ( sigma === 0.0 ) {
+ return degenerate( 0.0 );
+ }
+ s2 = pow( sigma, 2.0 );
+ return logcdf;
+
+ /**
+ * Evaluates the logarithm of the cumulative distribution function (CDF) for a Rayleigh distribution.
+ *
+ * @private
+ * @param {number} x - input value
+ * @returns {number} evaluated logCDF
+ *
+ * @example
+ * var y = logcdf( 2 );
+ * // returns <number>
+ */
+ function logcdf( x ) {
+ var p;
+ if ( isnan( x ) ) {
+ return NaN;
+ }
+ if ( x < 0.0 ) {
+ return NINF;
+ }
+ p = -pow( x, 2.0 ) / ( 2.0 * s2 );
+ return ( p < LNHALF ) ? log1p( -exp( p ) ) : ln( -expm1( p ) );
+ }
+}
+
+
+// EXPORTS //
+
+module.exports = factory;
+ |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| File | ++ | Statements | ++ | Branches | ++ | Functions | ++ | Lines | ++ |
|---|---|---|---|---|---|---|---|---|---|
| factory.js | +
+
+ |
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+
+ |
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+
+ |
+ 100% | +91/91 | +100% | +14/14 | +100% | +1/1 | +100% | +91/91 | +
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+
+ |
+ 100% | +68/68 | +100% | +2/2 | +100% | +1/1 | +100% | +68/68 | +
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 | 2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x + | /** +* @license Apache-2.0 +* +* Copyright (c) 2018 The Stdlib Authors. +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + +'use strict'; + +/** +* Rayleigh distribution logarithm of cumulative distribution function (CDF). +* +* @module @stdlib/stats/base/dists/rayleigh/logcdf +* +* @example +* var logcdf = require( '@stdlib/stats/base/dists/rayleigh/logcdf' ); +* +* var y = logcdf( 2.0, 5.0 ); +* // returns ~-2.564 +* +* var mylogcdf = logcdf.factory( 0.5 ); +* y = mylogcdf( 1.0 ); +* // returns ~-0.145 +* +* y = mylogcdf( 0.5 ); +* // returns ~-0.934 +*/ + +// MODULES // + +var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' ); +var main = require( './main.js' ); +var factory = require( './factory.js' ); + + +// MAIN // + +setReadOnly( main, 'factory', factory ); + + +// EXPORTS // + +module.exports = main; + |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 +59 +60 +61 +62 +63 +64 +65 +66 +67 +68 +69 +70 +71 +72 +73 +74 +75 +76 +77 +78 +79 +80 +81 +82 +83 +84 +85 +86 +87 +88 +89 +90 +91 +92 | 2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +2x +3009x +3009x +3009x +3009x +3009x +3009x +3007x +3009x +4x +4x +3009x +3x +3x +3009x +1x +1x +3001x +3001x +3009x +3009x +2x +2x +2x +2x +2x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2018 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var expm1 = require( '@stdlib/math/base/special/expm1' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var log1p = require( '@stdlib/math/base/special/log1p' );
+var exp = require( '@stdlib/math/base/special/exp' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var ln = require( '@stdlib/math/base/special/ln' );
+var LNHALF = require( '@stdlib/constants/float64/ln-half' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+
+
+// MAIN //
+
+/**
+* Evaluates the logarithm of the cumulative distribution function (CDF) for a Rayleigh distribution with scale parameter `sigma` at a value `x`.
+*
+* @param {number} x - input value
+* @param {NonNegativeNumber} sigma - scale parameter
+* @returns {number} evaluated logCDF
+*
+* @example
+* var y = logcdf( 2.0, 3.0 );
+* // returns ~-1.613
+*
+* @example
+* var y = logcdf( 1.0, 2.0 );
+* // returns ~-2.141
+*
+* @example
+* var y = logcdf( -1.0, 4.0 );
+* // returns -Infinity
+*
+* @example
+* var y = logcdf( NaN, 1.0 );
+* // returns NaN
+*
+* @example
+* var y = logcdf( 0.0, NaN );
+* // returns NaN
+*
+* @example
+* // Negative scale parameter:
+* var y = logcdf( 2.0, -1.0 );
+* // returns NaN
+*/
+function logcdf( x, sigma ) {
+ var s2;
+ var p;
+ if (
+ isnan( x ) ||
+ isnan( sigma ) ||
+ sigma < 0.0
+ ) {
+ return NaN;
+ }
+ if ( sigma === 0.0 ) {
+ return ( x < 0.0 ) ? NINF : 0.0;
+ }
+ if ( x < 0.0 ) {
+ return NINF;
+ }
+ s2 = pow( sigma, 2.0 );
+ p = -pow( x, 2.0 ) / ( 2.0 * s2 );
+ return ( p < LNHALF ) ? log1p( -exp( p ) ) : ln( -expm1( p ) );
+}
+
+
+// EXPORTS //
+
+module.exports = logcdf;
+ |
+ Press n or j to go to the next uncovered block, b, p or k for the previous block. +
+ +| 1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 +16 +17 +18 +19 +20 +21 +22 +23 +24 +25 +26 +27 +28 +29 +30 +31 +32 +33 +34 +35 +36 +37 +38 +39 +40 +41 +42 +43 +44 +45 +46 +47 +48 +49 +50 +51 +52 +53 +54 +55 +56 +57 +58 +59 +60 +61 +62 +63 +64 +65 +66 +67 +68 +69 | 1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +1x +3009x +3009x +3009x +1x +1x +1x +1x +1x + | /**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var addon = require( './../src/addon.node' );
+
+
+// MAIN //
+
+/**
+* Evaluates the logarithm of the cumulative distribution function (CDF) for a Rayleigh distribution with scale parameter `sigma` at a value `x`.
+*
+* @private
+* @param {number} x - input value
+* @param {NonNegativeNumber} sigma - scale parameter
+* @returns {number} evaluated logCDF
+*
+* @example
+* var y = logcdf( 2.0, 3.0 );
+* // returns ~-1.613
+*
+* @example
+* var y = logcdf( 1.0, 2.0 );
+* // returns ~-2.141
+*
+* @example
+* var y = logcdf( -1.0, 4.0 );
+* // returns -Infinity
+*
+* @example
+* var y = logcdf( NaN, 1.0 );
+* // returns NaN
+*
+* @example
+* var y = logcdf( 0.0, NaN );
+* // returns NaN
+*
+* @example
+* // Negative scale parameter:
+* var y = logcdf( 2.0, -1.0 );
+* // returns NaN
+*/
+function logcdf( x, sigma ) {
+ return addon( x, sigma );
+}
+
+
+// EXPORTS //
+
+module.exports = logcdf;
+ |