Kako lahko v LaTeX napišem to vrstico?

How Can I Write This Bar Latex

Rešitev:

Upam, da vam bo spodnja koda v pomoč ...

 documentclass {book}  begin {document}  [ overline {S}^{2} _ {n} ]  [ overline {S_ {n}}^{2} ]  [ bar {S_ { n}}^{2} ]  konec {document}
  Izhod  

 
 
 
 
 
  
Če v odgovoru na to vprašanje uporabite kodo Hendrika Vogta, imate widebar ukaz, ki upošteva poševni kot glifa:
 
 
 
 documentclass {article}  usepackage [utf8] {inputenc}%  usepackage {mathtools, nccmath}  makeatletter  let  [email protected]  mathaccent  newcommand* [email protected] [3] {%  setbox0  hbox { $ { mathaccent'0362 {#1}}^H $}%  setbox2  hbox {$ { mathaccent'0362 { kern0pt#1}}^H $}%  ifdim  ht0 =  ht2#3  else #2  fi} %Vrstica bo premaknjena na desno za polovico  [zaščiteno z e -pošto], ki jo izračuna amsmath:  newcommand* [zaščiteno z e -pošto] [1] { kern#1  dimexpr  [ zaščiteno po e -pošti]} %Če je za vrstico nadnapis, potem vrstici ne sme slediti negativno jedro; %dodatni {} poskrbi, da je v tem primeru nadnapis dovolj visok:  DeclareRobustCommand  widebar [1] {@ifnextchar^{{ [email protected] {#1} {0}}} { [email protected ] {#1} {1}}} %Uporabite ločen algoritem za posamezne simbole:  newcommand* [[email protected] [2] { [email protected] {#1} { [email protected] @{#1 } {#2} {1}} { [email protected] @{#1} {#2} {2}}}  newcommand* [email protected] @[3] {%  begingroup  def  mathaccent# #1 ## 2 { % %Omogoči gnezdenje naglasov:  let  mathaccent  [email protected] %Če obstaja več kot en simbol, namesto tega uporabite prvi znak (glejte spodaj):  if#32  let  [email protected]  [email protected]  fi % Določite poševni popravek:  setbox  [email protected]  hbox {$  [email protected] { [email protected]} _ {} $} %  setbox  [email protected ]  hbox {$  [email protected] { [email protected]} {} _ {} $}%  [email protected]  wd  [email protected]  vnaprej  [email protected]  wd  [email protected ] %Zdaj  [e -pošta zaščitena] je poševni popravek simbola.  divide  [email protected] 3  @tempdima  wd  [email protected]  advance @tempdima-  scriptspace %Zdaj  @tempdima je širina simbola.  divide  @tempdima 10  advance  [email protected]  @tempdima %Now  [email protected] = (poševnica / 3) - (Breite / 10)  ifdim  [email protected]>  [email protected]  [zaščiteno po e -pošti]  fi %Vrstica se bo v tem primeru skrajšala  [zaščitena po e -pošti]<0 !  [email protected] {0.6}kern- [email protected] if#31 overline{ [email protected] {-0.6}kern [email protected]  [email protected]  [email protected] {0.4}kern [email protected] }% advance [email protected] dimexpr [email protected] %Place the combined final kern (- [email protected] ) if it is >0 ali če sledi nadnapis:  let  [email protected] #2%  ifdim  [email protected]< [email protected] let [email protected] fi if [email protected] kern- [email protected] fi else overline{ [email protected] {-0.6}kern [email protected] #1}% fi }%  [email protected] @ne let [email protected] @empty let [email protected]  [email protected] @skewchar mathsurround [email protected]  [email protected] {mathgroup [email protected] 
elax}%  [email protected] @skewchar
elax letmathaccentV [email protected] @a %The following initialises  [email protected] and calls mathaccent: if#31  [email protected] @a
elax111{#1}% else %If the argument consists of more than one symbol, and if the first token is %a letter, use that letter for the computations: def [email protected] @marker##1endmarker{}% futurelet [email protected]  [email protected] @marker#1endmarker ifcat
oexpand [email protected] Aelse def [email protected] {}% fi  [email protected] @a
elax111{ [email protected] }% fi endgroup } makeatother egin{document} [ widebar{S}_n^2 = mfrac{1}{n}sum_{i=1}^{n}(X_{i} - M_{n})^{2} ]% end{document}  
 
  
jaz bi rekel
 
 documentclass [] {article}  begin {document} $$  overline {S} _n^2 =  frac {1} {n}  sum  limits_ {i = 1}^{n} (X_i - M_n)^ 2 $$  end {document}