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t,e=n(r),a=0,o=0,i=0;i<r.length;i++)a+=(t=r[i]-e)*t,o+=t*t*t;var u=r.length-1,h=Math.sqrt(a/u),f=r.length;return f*o/((f-1)*(f-2)*Math.pow(h,3))},r.sampleStandardDeviation=N,r.sampleVariance=C,r.sampleWithReplacement=function(r,t,n){if(0===r.length)return[];n=n||Math.random;for(var e=r.length,a=[],o=0;o<t;o++){var i=Math.floor(n()*e);a.push(r[i])}return a},r.shuffle=y,r.shuffleInPlace=E,r.sign=Z,r.silhouette=er,r.silhouetteMetric=function(r,t){return f(er(r,t))},r.standardDeviation=o,r.standardNormalTable=W,r.subtractFromMean=function(r,t,n){return(r*t-n)/(t-1)},r.sum=t,r.sumNthPowerDeviations=e,r.sumSimple=l,r.tTest=function(r,t){return(n(r)-t)/(o(r)/Math.sqrt(r.length))},r.tTestTwoSample=function(r,t,e){var a=r.length,o=t.length;if(!a||!o)return null;e||(e=0);var i=n(r),u=n(t),h=C(r),f=C(t);if("number"==typeof i&&"number"==typeof u&&"number"==typeof h&&"number"==typeof f){var l=((a-1)*h+(o-1)*f)/(a+o-2);return(i-u-e)/Math.sqrt(l*(1/a+1/o))}},r.uniqueCountSorted=k,r.variance=a,r.zScore=function(r,t,n){return(r-t)/n},Object.defineProperty(r,"__esModule",{value:!0})})); |
