sampson - npm Package Compare versions

Comparing version 0.2.6 to 0.2.7

dist/lib.min.js

@@ -1,1 +0,1 @@
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e=this.validate(t),r=e.mu;return Math.pow(r,-.5)}},{key:"kurtosis",value:function(t){var e=this.validate(t),r=e.mu;return Math.pow(r,-1)}}]),e}(q);B.covariates=1,B.discrete=!0;var F=function(t){function e(t){return g.classCallCheck(this,e),g.possibleConstructorReturn(this,Object.getPrototypeOf(e).call(this,g["extends"]({},t,{n:1})))}return g.inherits(e,t),g.createClass(e,null,[{key:"random",value:function(t){var e=this.validate(g["extends"]({},t,{n:1})),r=e.p,a=q.random();return r>a?1:0}},{key:"pdf",value:function(t,e){var r=this.validate(g["extends"]({},e,{n:1})),a=r.p;if("number"!=typeof t)throw new Error("k must be a number.");return 0==t?1-a:1==t?a:0}},{key:"cdf",value:function(t,e){var r=this.validate(g["extends"]({},e,{n:1})),a=r.p;if("number"!=typeof t)throw new Error("k must be a number.");return 1==t?a:0==t?1-a:NaN}}]),e}(_);F.covariates=1;var G=function(t){function e(){return 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0===t.mu)throw new Error("need a parameter object of shape { n: number, p: number }.");var e=t.mu;if("number"!=typeof e||0>=e)throw new Error("n must be greater than zero");return t}},{key:"random",value:function(t){for(var r=this.validate(t),a=r.mu,n=1,o=0,i=0;a>10;){var u=Math.round(a*(7/8)),s=A.random({a:u,b:1});if(s>=a)return i+_.random({p:a/s,n:u-1});i+=u,a-=s}o=Math.exp(-a);do n*=g.get(Object.getPrototypeOf(e),"random",this).call(this),i++;while(n>o);return i-1}},{key:"pdf",value:function(t,e){var r=this.validate(e),a=r.mu;if("number"!=typeof t)throw new Error("k must be a number.");return Math.exp(Math.log(a)*t-n(t+1)-a)}},{key:"cdf",value:function(t,e){var r=this,a=this.validate(e);a.mu;if("number"!=typeof t)throw new Error("k must be a number.");if(0>t)return 0;var n=Array.apply(null,Array(t+1)).map(function(t,a){return r.pdf(a,e)});return u(n)}},{key:"mean",value:function(t){var e=this.validate(t),r=e.mu;return r}},{key:"variance",value:function(t){var e=this.validate(t),r=e.mu;return r}},{key:"skewness",value:function(t){var e=this.validate(t),r=e.mu;return Math.pow(r,-.5)}},{key:"kurtosis",value:function(t){var e=this.validate(t),r=e.mu;return Math.pow(r,-1)}}]),e}(q);B.covariates=1,B.discrete=!0;var F=function(t){function e(t){return g.classCallCheck(this,e),g.possibleConstructorReturn(this,Object.getPrototypeOf(e).call(this,g["extends"]({},t,{n:1})))}return g.inherits(e,t),g.createClass(e,null,[{key:"random",value:function(t){var e=this.validate(g["extends"]({},t,{n:1})),r=e.p,a=q.random();return r>a?1:0}},{key:"pdf",value:function(t,e){var r=this.validate(g["extends"]({},e,{n:1})),a=r.p;if("number"!=typeof t)throw new Error("k must be a number.");return 0==t?1-a:1==t?a:0}},{key:"cdf",value:function(t,e){var r=this.validate(g["extends"]({},e,{n:1})),a=r.p;if("number"!=typeof t)throw new Error("k must be a number.");return 1==t?a:0==t?1-a:NaN}}]),e}(_);F.covariates=1;var G=function(t){function e(){return g.classCallCheck(this,e),g.possibleConstructorReturn(this,Object.getPrototypeOf(e).apply(this,arguments))}return g.inherits(e,t),g.createClass(e,null,[{key:"validate",value:function(t){if(!t||void 0===t.df)throw new Error("need a parameter object of shape { df: number }.");var e=t.df;if("number"!=typeof e||0>=e)throw RangeError("df must be greater than zero.");return t}},{key:"random",value:function(t){var e=this.validate(t),r=e.df;return 2*A.random({a:r/2,b:1})}},{key:"pdf",value:function(t,e){var r=this.validate(e),a=r.df;if("number"!=typeof t)throw new TypeError("x must be a number");return 0>t?0:2==a?Math.exp(-t/2)/2:Math.exp((a/2-1)*Math.log(t/2)-t/2-n(a/2))/2}},{key:"cdf",value:function(t,e){var r=this.validate(e),a=r.df;if("number"!=typeof t)throw new TypeError("x must be a number");return 0>t?0:2==a?1-Math.exp(-t/2):i(a/2,t/2)}},{key:"mean",value:function(t){var e=this.validate(t),r=e.df;return r}},{key:"variance",value:function(t){var e=this.validate(t),r=e.df;return 2*r}},{key:"stdDev",value:function(t){var e=this.validate(t),r=e.df;return Math.sqrt(2*r)}},{key:"relStdDev",value:function(t){var e=this.validate(t),r=e.df;return Math.sqrt(2/r)}},{key:"skewness",value:function(t){var e=this.validate(t),r=e.df;return Math.pow(2,1.5)/Math.sqrt(r)}},{key:"kurtosis",value:function(t){var e=this.validate(t),r=e.df;return 3+12/r}}]),e}(q);G.covariates=1;var U=function(t){function e(){return g.classCallCheck(this,e),g.possibleConstructorReturn(this,Object.getPrototypeOf(e).apply(this,arguments))}return g.inherits(e,t),g.createClass(e,null,[{key:"validate",value:function(t){if(!t||void 0===t.df)throw new Error("need a parameter object of shape { df: number }.");var e=t.df;if("number"!=typeof e||0>=e)throw RangeError("df must be greater than zero.");return t}},{key:"random",value:function(t){var e=this.validate(t),r=e.df;if(2>=r){var a=S.random({mu:0,sigma:1}),n=G.random({df:r});return a/Math.sqrt(n/r)}var o=void 0,i=void 0,u=void 0;do o=S.random({mu:0,sigma:1}),i=R.random({mu:1/(r/2-1)}),u=o*i/(r-2);while(0>1-u||Math.exp(-i-u)>1-u);return o/Math.sqrt((1-2/r)*(1-u))}},{key:"pdf",value:function(t,e){if("number"!=typeof t)throw TypeError("t must be a number.");var r=this.validate(e),a=r.df,o=n(a/2),i=n((a+1)/2);return Math.exp(i-o)/Math.sqrt(Math.PI*a)*Math.pow(1+t*t/a,-(a+1)/2)}},{key:"cdf",value:function(t,e){if("number"!=typeof t)throw TypeError("t must be a number.");var r=this.validate(e),a=r.df,n=void 0,o=void 0,i=void 0,u=void 0,s=void 0,l=void 0,v=void 0,f=void 0,h=void 0,c=void 0,d=1/Math.PI;if(i=a,n=t/Math.sqrt(i),o=i/(i+t*t),u=a-2,s=i%2,l=1,v=1,i=1,f=2+s,h=f,u>=2)for(c=f;u>=c;c+=2)v=v*o*(h-1)/h,l+=v,i=l,h+=2;return 1!=s?.5+.5*n*Math.sqrt(o)*l:(1==a&&(l=0),.5+(n*o*l+Math.atan(n))*d)}},{key:"mean",value:function(t){var e=this.validate(t),r=e.df;return 1>=r?NaN:0}},{key:"variance",value:function(t){var e=this.validate(t),r=e.df;return 1>r?NaN:2>=r?1/0:r/(r-2)}},{key:"stdDev",value:function(t){var e=this.validate(t),r=e.df;return 1>r?NaN:2>=r?1/0:Math.sqrt(r/(r-2))}},{key:"relStdDev",value:function(t){var e=this.validate(t);e.df;return NaN}},{key:"skewness",value:function(t){var e=this.validate(t),r=e.df;return r>3?0:NaN}},{key:"kurtosis",value:function(t){var e=this.validate(t),r=e.df;return 4>=r?NaN:3*(r-2)/(r-4)}}]),e}(q);U.covariates=1;var W=function(t){function e(){return g.classCallCheck(this,e),g.possibleConstructorReturn(this,Object.getPrototypeOf(e).apply(this,arguments))}return g.inherits(e,t),g.createClass(e,null,[{key:"validate",value:function(t){if(!t||void 0===t.a||void 0===t.b)throw new Error("need a parameter object of shape { a: number, b: number }.");var e=t.a,r=t.b;if("number"!=typeof e||0>=e)throw Error("a must be greater than zero.");if("number"!=typeof r||0>=r)throw RangeError("b must be greater than zero.");return t}},{key:"random",value:function(t){var r=this.validate(t),a=r.a,n=r.b;return a*Math.pow(-Math.log(g.get(Object.getPrototypeOf(e),"random",this).call(this)),1/n)}},{key:"pdf",value:function(t,e){if("number"!=typeof t)throw new TypeError("x must be a number");var r=this.validate(e),a=r.a,n=r.b;return 0>t?0:n/a*Math.pow(t/a,n-1)*Math.exp(-Math.pow(t/a,n))}},{key:"cdf",value:function(t,e){if("number"!=typeof t)throw new TypeError("x must be a number");var r=this.validate(e),a=r.a,n=r.b;return 0>t?0:1-Math.exp(-Math.pow(t/a,n))}},{key:"mean",value:function(t){var e=this.validate(t),r=e.a,a=e.b;return r*o(1+1/a)}},{key:"variance",value:function(t){var e=this.validate(t),r=e.a,a=e.b;return r*r*(o(1+2/a)-Math.pow(o(1+1/a),2))}},{key:"skewness",value:function(t){var e=t.a,r=t.b,a=this.stdDev(t),n=this.mean(t);return(o(1+3/r)*Math.pow(e,3)-3*n*a*a-Math.pow(n,3))/Math.pow(a,3)}},{key:"kurtosis",value:function(t){var e=t.a,r=t.b,a=this.stdDev(t),n=this.mean(t),i=this.skewness(t);return(o(1+4/r)*Math.pow(e,4)-4*i*Math.pow(a,3)*n-6*Math.pow(n,2)*Math.pow(a,2)-Math.pow(n,4))/Math.pow(a,4)-3}}]),e}(q);W.covariates=1,W.discrete=!1;var Y=function(t){function e(){return g.classCallCheck(this,e),g.possibleConstructorReturn(this,Object.getPrototypeOf(e).apply(this,arguments))}return g.inherits(e,t),g.createClass(e,null,[{key:"validate",value:function(t){if(!t||void 0===t.a||void 0===t.b)throw new Error("need a parameter object of shape { a: number, b: number }.");var e=t.a,r=t.b;if("number"!=typeof e)throw Error("a must be a number.");if("number"!=typeof r||e>=r)throw RangeError("b must be greater than a.");return t}},{key:"random",value:function(t){var r=this.validate(t),a=r.a,n=r.b;return a+g.get(Object.getPrototypeOf(e),"random",this).call(this)*(n-a)}},{key:"pdf",value:function(t,e){if("number"!=typeof t)throw new TypeError("x must be a number");var r=this.validate(e),a=r.a,n=r.b;return a>t||t>n?0:1/(n-a)}},{key:"cdf",value:function(t,e){if("number"!=typeof t)throw new TypeError("x must be a number");var r=this.validate(e),a=r.a,n=r.b;return a>t?0:t>=n?1:(t-a)/(n-a)}},{key:"mean",value:function(t){var e=this.validate(t),r=e.a,a=e.b;return(r+a)/2}},{key:"variance",value:function(t){var e=this.validate(t),r=e.a,a=e.b;return Math.pow(a-r,2)/12}},{key:"skewness",value:function(t){return 0}},{key:"kurtosis",value:function(t){return-1.2}}]),e}(q);Y.covariates=1,Y.discrete=!1;var H=function(){function t(e){var r=this;if(g.classCallCheck(this,t),this.covariance=function(t){return r.constructor.covariance(r,t)},this.correlation=function(t){return r.constructor.correlation(r,t)},0==e.length)throw new Error("Sample of size 0 not allowed.");this.data=e,this.size=e.length,this.mean=s(e),this.std=this.constructor.stdDev(e),this.variance=this.constructor.variance(e),this.skewness=this.constructor.skewness(e),this.kurtosis=this.constructor.kurtosis(e),this.sqrdMeanDev=this.constructor.sqrdMeanDev(e),this.meanDev=this.constructor.meanDev(e),this.rootMeanSqrd=this.constructor.rootMeanSqrd(e),this.stdMeanDev=this.constructor.stdMeanDev(e),this.relStdDev=this.constructor.relativeStdDev(e),this.quartiles=this.constructor.quartiles(e)}return g.createClass(t,null,[{key:"variance",value:function(t){return p(t,2)/(t.length-1)}},{key:"sqrdMeanDev",value:function(t){return p(t,2)}},{key:"meanDev",value:function(t){return p(t,1,!0)/t.length}},{key:"stdDev",value:function(t){var e=this.variance(t);return isNaN(e)?0:Math.sqrt(e)}},{key:"rootMeanSqrd",value:function(t){return Math.sqrt(t.map(function(t){return t*t}).reduce(function(t,e){return t+e})/t.length)}},{key:"stdMeanDev",value:function(t){return this.stdDev(t)/Math.sqrt(t.length)}},{key:"relativeStdDev",value:function(t){return this.stdDev(t)/s(t)}},{key:"quartiles",value:function(t){return d(t,[.25,.5,.75])}},{key:"skewness",value:function(t){var e=this.stdDev(t);if(isNaN(e)||t.length<3)return NaN;var r=t.length,a=Math.pow(e,3),n=p(t,3);return r*n/((r-1)*(r-2)*a)}},{key:"kurtosis",value:function(t){var e=this.stdDev(t);if(isNaN(e)||t.length<3)return NaN;var r=(t.length,p(t,2)),a=p(t,4);return a/Math.pow(r,2)}},{key:"covariance",value:function(t,e){if(!t||!e||t.size<=1||t.size!==e.size)return NaN;var r=t.data.map(function(r,a){return(t.data[a]-t.mean)*(e.data[a]-e.mean)}).reduce(function(t,e){return t+e},0);return r/(t.size-1)}},{key:"correlation",value:function(t,e){if(!(t&&t.std&&e&&e.std))return NaN;var r=this.covariance(t,e);return r/t.std/e.std}}]),t}();t.choose=e,t.error=r,t.factorial=a,t.gamma=o,t.gammainc_lower=i,t.lngamma=n,t.median=h,t.mean=s,t.mode=l,t.percentile=c,t.quantile=d,t.range=m,t.select=v,t.std=b,t.stirling=k,t.sum=u,t.sumNthPowerDev=p,t.variance=y,t.zscore=w,t.Normal=S,t.Binomial=_,t.Bernoulli=F,t.StudentsT=U,t.Gamma=A,t.ChiSquared=G,t.Exponential=R,t.Cauchy=D,t.Pareto=I,t.Poisson=B,t.Weibull=W,t.Uniform=Y,t.Sample=H,t.ttest=M});

lib/distributions/binomial.js

@@ -28,3 +28,3 @@ /* @flow */
     if (typeof n != 'number' || n < 0) throw new Error("n must be positive or zero.")
-    return params
+    return { n: Math.floor(n), p }
   }
@@ -130,7 +130,8 @@
       let P: number;
-      if (p == 0) { P = (k == 0) ? 1 : 0 }
-      else if (p == 1) { P = (k == n) ? 1 : 0 }
+      let x = Math.floor(k);
+      if (p == 0) { P = (x == 0) ? 1 : 0 }
+      else if (p == 1) { P = (x == n) ? 1 : 0 }
       else {
-        let Cnk = choose(n, k);
-        let pows = Math.pow(p, k) * Math.pow((1-p), (n-k));
+        let Cnk = choose(n, x);
+        let pows = Math.pow(p, x) * Math.pow((1-p), (n-x));
         if (Cnk == 'Infinity') {
@@ -137,0 +138,0 @@ if (pows == 0) return 0

lib/distributions/poisson.js

@@ -37,3 +37,5 @@ /* @flow */
     let { mu } = this.validate(params);
-    let prod, emu, k = 0;
+    let prod = 1;
+    let emu;
+    let k = 0;
     while (mu > 10) {
@@ -48,3 +50,3 @@ let m = Math.round(mu * (7 / 8));
     };
-    mu = Math.exp(-mu)
+    emu = Math.exp(-mu)
     do {
@@ -51,0 +53,0 @@ prod *= super.random()

package.json

@@ -5,3 +5,3 @@ {
   "author": "Jack Shira <[e-mail]> (http://www.atg.io)",
-  "version": "0.2.6",
+  "version": "0.2.7",
   "license": "ISC",
@@ -13,3 +13,3 @@ "repository" : {
   "engine": "node >= 5.8.0",
-  "main": "lib.js",
+  "main": "dist/lib.js",
   "jsnext:main": "lib.es6.js",
@@ -19,2 +19,3 @@ "scripts": {
     "cover": "BABEL_ENV=test node_modules/.bin/istanbul cover babel-tape-runner test/**/*.test.js",
+    "codecov": "npm run cover && codecov",
     "doc": "node_modules/.bin/esdoc -c esdoc.json",
@@ -21,0 +22,0 @@ "build": "BABEL_ENV=build node rollup.js",

README.md

 # Sampson.js
+[![npm](https://img.shields.io/npm/v/sampson.svg)](https://www.npmjs.com/package/sampson)
+[![CircleCI branch](https://img.shields.io/circleci/project/atgJack/sampson/master.svg)](https://github.com/atgJack/sampson/tree/master/test)
+[![Codecov](https://img.shields.io/codecov/c/github/atgJack/sampson.svg)](https://codecov.io/github/atgJack/sampson)
 
@@ -3,0 +6,0 @@ A Statistical Sampling and Distribution Library.

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Improved metrics

Total package byte prevSize

356166

increased by0.18%

Number of package files

83

increased by1.22%

Lines of code

9019

increased by0.06%

Number of lines in readme file

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increased by5.17%

No dependency changes