jsdataframe/jsdataframe-min.js

a data frame library inspired by R and Python Pandas

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n=t.length>0?t[0].length:0;if(e=Ht(e)?mt(n):Wt(e),n>0&&n!==e.size())throw new Error('"colNames" must have the same length as each '+"row array");return r(t,0,e)},Jt.dfFromMatrixWithHeader=function(t){if(!Array.isArray(t))throw new Error('"matrix" must be an array');if(0===t.length)throw new Error('"matrix" must not have length 0');var e=Wt(t[0]);if(t.length>1&&e.size()!==t[1].length)throw new Error("header row must have the same length as other "+"row arrays");return r(t,1,e)},Jt.unpack=function(t){if(t.type===Gt.type)return n(t);if(t.type===te.type){var e=n(t.names),r=t.cols.map(function(t){return n(t)});return Jt.df(r,e)}throw new Error('"obj" has unrecognized type: '+t.type)},Jt.vCat=function(){for(var t=arguments.length,e=st(t),r=null,n=0,i=0;t>i;i++){var o=arguments[i];if(!Ht(o)&&null!==o&&o.type===te.type)throw new Error("cannot pass data frame arguments to jd.vCat");var u=Bt(o);null===r&&"object"!==u.dtype&&(r=u.dtype),n+=u.size(),e[i]=u}r=null===r?"object":r;var 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at(e,"number")},Qt.mod=function(t){t=Bt(t,"number"),Vt(t,"number");var e=ft(this.values,t.values,NaN,j);return at(e,"number")},Qt.pow=function(t){t=Bt(t,"number"),Vt(t,"number");var e=ft(this.values,t.values,NaN,Math.pow);return at(e,"number")},Qt.abs=function(){return at(this.values.map(Math.abs),"number")},Qt.sqrt=function(){return at(this.values.map(Math.sqrt),"number")},Qt.sign=function(){return at(this.values.map(Math.sign),"number")},Qt.ceil=function(){return at(this.values.map(Math.ceil),"number")},Qt.floor=function(){return at(this.values.map(Math.floor),"number")},Qt.round=function(){return at(this.values.map(Math.round),"number")},Qt.exp=function(){return at(this.values.map(Math.exp),"number")},Qt.log=function(){return at(this.values.map(Math.log),"number")},Qt.sin=function(){return at(this.values.map(Math.sin),"number")},Qt.cos=function(){return at(this.values.map(Math.cos),"number");
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a=Jt.df([this.c(o).unique().sort()],["variable"]),l=Jt.vCat(s,o,u),c=this.s(null,l),h=c.groupApply(Jt.rng(0,-2),function(t){t=t.setNames(["variable","value"]),Ht(n)||(t=t.groupApply("variable",function(t){return n(t.c(0))},"value"));var e=a.join(t,"left");if(e.nRow()!==a.nRow())throw new Error('must provide "aggFunc" when aggregation is required');return Ht(i)?e.c("value"):e.c("value").replaceNa(i)},a.c("variable"));return h};var ze=Jt.vector(["by","leftBy","rightBy","leftSuffix","rightSuffix","indicator"]);te.join=function(t,e,r){if(Ht(t)||null===t||t.type!==te.type)throw new Error('"other" must be a data frame');var n=!1,i="_x",o="_y",u=!1,s=!1;switch(e){case"inner":break;case"left":u=!0;break;case"right":s=!0;break;case"outer":u=!0,s=!0;break;default:throw new Error('"how" must be one of the following strings: '+'"inner", "left", "right", "outer"')}Ht(r)||(Tt(r,ze),Ht(r.indicator)||(n=r.indicator),Ht(r.leftSuffix)||(i=r.leftSuffix),Ht(r.rightSuffix)||(o=r.rightSuffix));var a=Y(this,t,r),l=a.left,c=a.right,h=this.s(null,l),f=this.s(null,l.ex()),v=t.s(null,c),p=t.s(null,c.ex());if(h.dtypes().c("dtype").contains("object")||v.dtypes().c("dtype").contains("object"))throw new Error('key columns must not have "object" dtype');if(!h.dtypes().c("dtype").equals(v.dtypes().c("dtype")))throw new Error("key columns must have matching dtypes on left "+"and right");var d,m,y=f.names().s(f.names().isIn(p.names())),g=f.names().map(function(t){return y.contains(t)?t+i:t}),b=p.names().map(function(t){return y.contains(t)?t+o:t}),w=Jt.vCat(h.names(),g,b,n?["_join"]:[]),_=v._getIndex(),x=h.nRow(),N=st(w.size());for(m=0;m<N.length;m++)N[m]=[];if(s)for(d=st(v.nRow()),m=0;m<d.length;m++)d[m]=!0;for(m=0;x>m;m++){var E=_.lookup(h._cols,m);if(null===E)u&&P(N,h,f,p,m,null,"leftOnly");else if("number"==typeof E)P(N,h,f,p,m,E,"both"),s&&(d[E]=!1);else for(var O=0;O<E.length;O++){var j=E[O];P(N,h,f,p,m,j,"both"),s&&(d[j]=!1)}}if(s){var 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r,n,i="number"===this.dtype,o="string"===this.dtype;switch(t.resolveMode){case Se.INT:if(!i)throw new Error("expected number vector for integer indexing "+'but got vector with dtype: "'+this.dtype+'"');for(r=0;r<this.values.length;r++)e.push(et(this.values[r],t.maxLen));break;case Se.COL:if(i)for(r=0;r<this.values.length;r++)e.push(et(this.values[r],t.maxLen));else{if(!o)throw new Error("expected number or string vector for column "+'indexing but got vector with dtype: "'+this.dtype+'"');for(r=0;r<this.values.length;r++){var u=this.values[r];n=t.index.lookupKey([u]),rt(n,u,t,e)}}break;case Se.KEY:if(1!==t.index.arity)throw new Error("unimplemented case (TODO)");var s=t.index.initVectors[0].dtype;if(this.dtype!==s)throw new Error('expected "'+s+'" vector for key '+'lookup but got vector with dtype: "'+this.dtype+'"');var a=[this];for(r=0;r<this.values.length;r++)n=t.index.lookup(a,r),rt(n,this.values[r],t,e);break;default:throw new Error("Unrecognized RESOLVE_MODE: 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l=this.lookup(t,a);if(l===a||l[0]===a){for(i=0;e>i;i++)n[i][s]=t[i].values[a];o[s]=l===a?1:l.length,s++}}var c=n.map(function(e,r){return at(e,t[r].dtype)});return{vectors:c,counts:at(o,"number")}},ie.unique=function(){return this.valueCounts().vectors},ie.duplicated=function(t){Ht(t)&&(t="first");var e=!1,r=!1;if("first"===t)e=!0;else if("last"===t)r=!0;else if(t!==!1)throw new Error('"keep" must be either "first", "last", or fal