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c=a.length,d=-1,e=0;while(++d<c)a[d]===b[d]&&e++;return e/c},braycurtis:function(a,b){var c=a.length,d=-1,e=0,f=0,g,h;while(++d<c)g=a[d],h=b[d],e+=Math.abs(g-h),f+=Math.abs(g+h);return e/f}},science.stats.erf=function(a){var b=.254829592,c=-0.284496736,d=1.421413741,e=-1.453152027,f=1.061405429,g=.3275911,h=a<0?-1:1;a<0&&(h=-1,a=-a);var i=1/(1+g*a);return h*(1-((((f*i+e)*i+d)*i+c)*i+b)*i*Math.exp(-a*a))},science.stats.phi=function(a){return.5*(1+science.stats.erf(a/Math.SQRT2))},science.stats.kernel={uniform:function(a){return a<=1&&a>=-1?.5:0},triangular:function(a){return a<=1&&a>=-1?1-Math.abs(a):0},epanechnikov:function(a){return a<=1&&a>=-1?.75*(1-a*a):0},quartic:function(a){if(a<=1&&a>=-1){var b=1-a*a;return.9375*b*b}return 0},triweight:function(a){if(a<=1&&a>=-1){var b=1-a*a;return 35/32*b*b*b}return 0},gaussian:function(a){return 1/Math.sqrt(2*Math.PI)*Math.exp(-0.5*a*a)},cosine:function(a){return 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r={left:l,right:m,dist:h[j][k],centroid:d(l.size,l.centroid,m.size,m.centroid),size:l.size+m.size,depth:1+Math.max(l.depth,m.depth)};i[j].splice(0,0,r),g[j]+=g[k];for(q=0;q<e;q++)switch(b){case"single":h[j][q]>h[k][q]&&(h[q][j]=h[j][q]=h[k][q]);break;case"complete":h[j][q]<h[k][q]&&(h[q][j]=h[j][q]=h[k][q]);break;case"average":h[q][j]=h[j][q]=(g[j]*h[j][q]+g[k]*h[k][q])/(g[j]+g[q])}h[j][j]=Infinity;for(p=0;p<e;p++)h[p][k]=h[k][p]=Infinity;for(q=0;q<e;q++)f[q]==k&&(f[q]=j),h[j][q]<h[j][f[j]]&&(f[j]=q);o=r}return o}var a=science.stats.distance.euclidean,b="simple";return c.distance=function(b){return arguments.length?(a=b,c):a},c},science.stats.iqr=function(a){var b=science.stats.quantiles(a,[.25,.75]);return b[1]-b[0]},science.stats.loess=function(){function d(d,i,j){var k=d.length,l;if(k!==i.length)throw{error:"Mismatched array lengths"};if(k==0)throw{error:"At least one point 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