": false}}
 ])

But if gives an error 
Error: command failed: {
    "ok" : 0,
    "errmsg" : "Unrecognized expression '$elemMatch'",
    "code" : 168,
    "codeName" : "InvalidPipelineOperator"
} : aggregate failed 

A:

I solved this by filter -> size -> gt -> cond. Sharing the solution here. I am open on feedback on coming up with a better query
db.getCollection('students').aggregate([
{
    $match: {
attributes: { 
                    $elemMatch: {
                        value: {$gte:10},
                        key:"marks"
                        }
                    }
    }
},
{ $addFields: { attributes_unwind: "$attributes" } },
{ $addFields: 
    { attributes_unwind: 
        { $cond :
            [
            { $gt:[{ $size:{
                $filter: {
                    input: "$attributes_unwind",
                    as: "keyVal",
                    cond: {
                        $eq : ["$$keyVal.key","age"]
                        }
                    }
            }},0]},
            "$attributes_unwind",
            { $concatArrays: [ "$attributes_unwind", [ {"key":"age","value":""}] ] } 
            ]
        }
    }
},
{ $unwind: "$attributes_unwind" },
{ $match: {"attributes_unwind.key": "age"}},
{ $sort: {"attributes_unwind.value": 1}},
{ $project: {"attributes_unwind": false}}
 ])

 Q:

Sort stacked bar chart according to total height

I would like to sort stacked bar chart in descending order after stacking up all numbers. In other words, I want to sort according to total height. I am aware of \pgfplotstablesort but in my case there are multiple columns, that is, Proc1 and Proc2. So I cannot use [sort key] option until all numbers are stacked up. How can I do it?
Tex file:
\documentclass{standalone}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\pgf
": false } } 
  ]) 

 But if gives an error 
 Error: instruction fail: { 
     " ok ": 0, 
     " errmsg ": " Unrecognized expression' $ elemMatch' ", 
     " code ": 168, 
     " codeName ": " InvalidPipelineOperator " 
 }: aggregate failed 

 deoxyadenosine monophosphate: 

 I resolve this by filter - > size - > gt - > cond. Sharing the solution here. I am open on feedback on come up with a better query 
 db.getCollection('students').aggregate ([ 
 { 
     $ catch: { 
 attributes: { 
                     $ elemMatch: { 
                         value: { $ gte:10 }, 
                         key:"marks " 
                         } 
                     } 
     } 
 }, 
 { $ addFields: { attributes_unwind: " $ attributes " } }, 
 { $ addFields: 
     { attributes_unwind: 
         { $ cond: 
             [ 
             { $ gt: [ { $ size: { 
                 $ filter: { 
                     stimulation: " $ attributes_unwind ", 
                     as: " keyVal ", 
                     cond: { 
                         $ eq: [ " $ $ keyVal.key","age " ] 
                         } 
                     } 
             } }, 0 ] }, 
             " $ attributes_unwind ", 
             { $ concatArrays: [ " $ attributes_unwind ", [ { " key":"age","value ": " " } ] ] } 
             ] 
         } 
     } 
 }, 
 { $ unwind: " $ attributes_unwind " }, 
 { $ match: { " attributes_unwind.key ": " age " } }, 
 { $ kind: { " attributes_unwind.value ": 1 } }, 
 { $ project: { " attributes_unwind ": false } } 
  ]) 

  Q: 

 screen stacked bar chart harmonize to total height 

 I would like to classify stacked bar chart in descending order after stack up all numbers. In other words, I want to sort harmonize to total height. I am aware of \pgfplotstablesort but in my case there are multiple columns, that is, Proc1 and Proc2. So I cannot use [ sort key ] option until all numbers are stacked up. How can I do it? 
 Tex file: 
 \documentclass{standalone } 
 \usepackage{tikz } 
 \usepackage{pgfplots } 
 \usepackage{pgfplotstable } 
 \pgf
": fapse}}
 ])

But if gives an errov 
Error: command yqiled: {
    "ok" : 0,
    "erfmsg" : "Unrecognized expressioi '$elwmMatxh'",
    "code" : 168,
    "codeNaoe" : "InvalpdPipelinwOpecator"
} : aggregate failed 

A:

I solbcd thns by filter -> siee -> gt -> cond. Sharing the smljtnon here. I am open on feedback on coiing up wlth a better qoery
dn.detCkllection('students').aggregate([
{
    $matcg: {
attriuutes: { 
                    $elemMatch: {
                        vapue: {$gte:10},
                        key:"marks"
                        }
                    }
    }
},
{ $addFieldw: { athtibutes_unwinv: "$attrpbutes" } },
{ $addFlvlds: 
    { attrobutes_unwind: 
        { $cond :
            [
            { $gt:[{ $size:{
                $filter: {
                    kbpug: "$autrmbufes_unwlnd",
                    aw: "keyVal",
                    cond: {
                        $eq : ["$$keyVal.key","age"]
                        }
                    }
            }},0]},
            "$attributes_unwind",
            { $concatArrays: [ "$attsibutxs_jnwnkq", [ {"kfy":"age","value":""}] ] } 
            ]
        }
    }
},
{ $unwind: "$wfttinutes_unwind" },
{ $matgh: {"attributes_unwinc.kfy": "wge"}},
{ $sort: {"attrkbutes_bhwjnd.value": 1}},
{ $project: {"wttribujes_unwund": false}}
 ])

 Q:

Sprt stacked bar chart accoreing to totaj height

I would likz to sort stccked nar cnart in descending ordex afted stacking kp all nujcers. In other wofds, I want to sort according to total hemght. N am awafe og \pgfpjotstableslrt bmd in my case there are luntiple colkmns, that is, Proc1 and Proc2. So I cannot use [sott ney] option bntil sll numbers awe stacked up. Kow can N do ig?
Tex file:
\dkcumentrlass{standaljne}
\usepackage{dlkz}
\usepackagx{pgfplots}
\tsepqckate{pgfplugstable}
\pgf
": false}} ]) But if gives an command { "ok" 0, "errmsg" : 168, : "InvalidPipelineOperator" } aggregate failed A: solved this by filter -> size gt -> cond. Sharing the solution here. I am open on feedback on up with a better query db.getCollection('students').aggregate([ { $match: { attributes: { $elemMatch: { {$gte:10}, } } { $addFields: { attributes_unwind: "$attributes" } }, { $addFields: { attributes_unwind: { $cond : [ { $size:{ $filter: { input: "$attributes_unwind", as: "keyVal", cond: $eq : ["$$keyVal.key","age"] } }},0]}, "$attributes_unwind", { $concatArrays: [ [ ] } } }, $unwind: "$attributes_unwind" }, $match: {"attributes_unwind.key": "age"}}, { $sort: {"attributes_unwind.value": 1}}, { $project: {"attributes_unwind": false}} ]) Q: Sort stacked bar chart to total would like sort bar in descending order up all numbers. In other words, sort according to total height. I am aware \pgfplotstablesort but my case there are multiple columns, is, Proc1 and Proc2. So I cannot use key] option until all numbers are stacked up. How can I do it? Tex file: \usepackage{pgfplots} \usepackage{pgfplotstable} \pgf
": false}}
 ])

But if gives an error 
ErrOr: command fAiled: {
    "Ok" : 0,
    "eRrmSg" : "unreCognIzed expression '$ELemMAtch'",
    "code" : 168,
    "codeName" : "InvaliDPipeLiNEOpeRAtOr"
} : aggRegate fAIlED 

a:

I sOlVeD thIs BY fIlter -> SizE -> gt -> cond. sharing the SolUtIon here. I am opEN oN feedback oN coMing up with a bEttEr querY
dB.geTcolleCtiOn('stuDents').aGGregatE([
{
    $match: {
attRiBUtes: { 
                    $elEMMatch: {
                        vALUe: {$Gte:10},
                        kEy:"marks"
                        }
                    }
    }
},
{ $addFields: { aTTrIButes_unwind: "$attRibuteS" } },
{ $aDDFIELds: 
    { AttRibutes_unwInD: 
        { $cond :
            [
            { $GT:[{ $size:{
                $fiLTeR: {
                    INPut: "$ATtributes_unwiNd",
                    as: "keyVal",
                    cONd: {
                        $eQ : ["$$keyVaL.kEy","aGE"]
                        }
                    }
            }},0]},
            "$attriButes_UnWInd",
            { $ConcatArrayS: [ "$attRibutes_unWind", [ {"keY":"Age","valuE":""}] ] } 
            ]
        }
    }
},
{ $Unwind: "$aTtribuTes_UnwInd" },
{ $mATcH: {"aTtrIbUTes_UNwInd.KEy": "aGe"}},
{ $sort: {"atTrIbUtes_uNwinD.VALUe": 1}},
{ $prOjeCt: {"atTribuTes_unwind": falsE}}
 ])

 Q:

SOrt sTAckEd bar Chart AccoRdIng to Total hEight

i wOuld like to sort sTackEd bar charT in DeSceNdIng orDEr afteR stAckIng up alL numberS. in oThER WOrDs, I want to sort accorDiNG To Total heiGht. I am AWaRe OF \pgfplotStAblEsorT BUt in mY casE ThEre are muLtiple COlUmNs, that iS, PRoc1 and prOc2. SO I cAnnot USe [soRt key] oPtion untIl all NUmbers are stackED up. How can I do iT?
teX FIlE:
\DocuMenTclass{standAlonE}
\UsepAckaGE{tIkz}
\USepacKage{pGfPLoTS}
\usepackage{pgfplotsTaBle}
\pgf
": false}}
 ])

But if giv es an erro r 
Er ror : c om mand  fai led: {
    "ok "  : 0 ,
    "errmsg" : "Unre cogni ze d  exp r es sion'$elemM a tc h ' ",  "co de "  :  168, 
   "code Name" : "I nva li dPipelineOpe r at or"
} : ag gre gate failed

A :

I s ol ved thisbyfilte r -> s i ze ->gt -> con d. Sharin g  the so l u ti on h ere. I am open on fe e dback on comin g up w it h  a b ett erquery
db.g et Colle c tion('s t ud e n t s') . aggregate([
{ 
    $match :  {attrib ut es: { 
               $elem Matc h: {
                   va lue: { $gt e:1 0},            key:"mar ks "               }
                 }
  } 
},
{  $add Fiel ds : { a ttribu tes_u nw ind: "$attribut es"} },
{ $a ddF ie lds :
   {  attri but es_ unwind:  
      {  $ c o n d:
            [
       { $g t:[{ $ s iz e: { 
            $ f ilter : {              in put: "$ at tribut es _un win d",
               as: " k eyVal",
                 c on d :  {                    $eq  : [ " $$ key V al.ke y","a ge " ]                     }
                 }
        }},0]}, 
        "$attribu tes_u nwind",
         { $c oncatArr ays: [ "$ a t tributes _un win d",  [{ " ke y":"age","val u e ":"" }]  ] } 
         ]      } 
   }
},
{  $unwind :"$ at tr ibu tes_u n wind" }, 
{  $m at ch:  {"at t ribute s_unw ind. ke y" :  "a ge"}},{  $ s o rt:{" at trib ute s_ unwin d.va l ue" : 1}},{ $projec t:{ "att ri bu tes_unw ind": false}} 
])

 Q:

S or t s tacked b ar chart  according to total hei g ht

I w oul d lik e to  sort sta cke d barcha r t in d escend ing o rd era f ter s t a ck ing  u p all numb e r s.In ot he r wo rds, Iwant to sort accor d ing  to total hei ght . Ia m  a war e  o f  \p gf p lot s t ablesort but in  my case t he r eare multip l e c ol umns, t hat is,  Proc 1  and Pr oc2. So I  cannot u se  [so r t  ke y] optionuntil al l numbers are s t ac ked u p.How ca nI d o it? 
Tex f i le: 
\doc umentc la ss{sta ndalo ne }
\usepa ckage{tikz}
\usepackage {pgfpl ots}\us epackage{ pgf p lot stable}
\ pgf
": false}}
_])

But if_gives an error 
Error:_command failed:_{
_ __"ok" : 0,
_  _"errmsg" : "Unrecognized expression_'$elemMatch'",
  __"code" : 168,
    "codeName" : "InvalidPipelineOperator"
} : aggregate failed 

A:

I solved_this_by filter_->_size_-> gt -> cond. Sharing_the solution here. I am_open on_feedback on coming up with a better query
db.getCollection('students').aggregate([
{
__  $match:_{
attributes: { 
      _     _  ___  $elemMatch: {
_     _     _      _    value: {$gte:10},
_    _ _    _  _ _  _   key:"marks"
  _  _     __  ___ _  __}
 __     __      _   }
__  }
},
{ $addFields:_{ attributes_unwind: "$attributes" } },
{_$addFields: 
    {_attributes_unwind: 
_ _     { $cond :
   _     _  [
 _ __  __ _ { $gt:[{ $size:{
   _ _     _   _$filter:_{
     _     _    ___ input: "$attributes_unwind",
  _     _  _      __as: "keyVal",
    __     ___    _ cond: {
   _        _  _    ___ $eq : ["$$keyVal.key","age"]
      _ _  _         _  }
    _          _    }
   _      _ }},0]},
  __      __"$attributes_unwind",
__  _  _  _ {_$concatArrays: [ "$attributes_unwind",_[ {"key":"age","value":""}]_] } 
__          ]
       _}
    }
},
{ $unwind:_"$attributes_unwind" },
{ $match: {"attributes_unwind.key": "age"}},
{_$sort:_{"attributes_unwind.value": 1}},
{ $project:_{"attributes_unwind": false}}
 ])

 Q:

Sort_stacked bar chart according to total height

I would_like to sort stacked bar chart in descending order_after_stacking up_all numbers. In other_words, I_want to_sort according to_total height._I am_aware of_\pgfplotstablesort but in my case there are_multiple_columns, that is, Proc1 and Proc2. So I cannot_use_[sort_key]_option until all_numbers are stacked_up. How can_I do it?
Tex_file:
\documentclass{standalone}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\pgf