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Undefined Control Sequence (with installed package)?

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1

I am trying to make a table that includes sums. This is what my code looks like:

    begin{center}

    begin{tabular}{ || c  c  c  c || }

    hline

    Line & Cost & Executions \ [0.5ex]

    hlinehline

    1 & $c_1$ & n -1 \

    hline

    2 & $c_2$ & $sum{ j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum{ j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum{ j=1}^{n} j - 1$ \ [lex]

    hline

    end{tabular}

    end{center}

I get the error that the first line including a sum has an undefined control sequence. I have the package: usepackage{amsmath}.

Any ideas how to fix this?

tables

share|improve this question

asked 13 hours ago

B. LopB. Lop

82

New contributor

B. Lop is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  It is sum, not sum, and _{j=1}, not {j=1}, and ^n or ^{n}, not ^{n}, and [1ex], not [lex].
  
  – JouleV
  13 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much!
  
  – B. Lop
  13 hours ago
  

  
  
  
  

add a comment | 

1

I am trying to make a table that includes sums. This is what my code looks like:

    begin{center}

    begin{tabular}{ || c  c  c  c || }

    hline

    Line & Cost & Executions \ [0.5ex]

    hlinehline

    1 & $c_1$ & n -1 \

    hline

    2 & $c_2$ & $sum{ j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum{ j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum{ j=1}^{n} j - 1$ \ [lex]

    hline

    end{tabular}

    end{center}

I get the error that the first line including a sum has an undefined control sequence. I have the package: usepackage{amsmath}.

Any ideas how to fix this?

tables

share|improve this question

asked 13 hours ago

B. LopB. Lop

82

New contributor

B. Lop is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  It is sum, not sum, and _{j=1}, not {j=1}, and ^n or ^{n}, not ^{n}, and [1ex], not [lex].
  
  – JouleV
  13 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much!
  
  – B. Lop
  13 hours ago
  

  
  
  
  

add a comment | 

I am trying to make a table that includes sums. This is what my code looks like:

    begin{center}

    begin{tabular}{ || c  c  c  c || }

    hline

    Line & Cost & Executions \ [0.5ex]

    hlinehline

    1 & $c_1$ & n -1 \

    hline

    2 & $c_2$ & $sum{ j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum{ j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum{ j=1}^{n} j - 1$ \ [lex]

    hline

    end{tabular}

    end{center}

I get the error that the first line including a sum has an undefined control sequence. I have the package: usepackage{amsmath}.

Any ideas how to fix this?

tables

share|improve this question

asked 13 hours ago

B. LopB. Lop

82

New contributor

B. Lop is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

    begin{center}

    begin{tabular}{ || c  c  c  c || }

    hline

    Line & Cost & Executions \ [0.5ex]

    hlinehline

    1 & $c_1$ & n -1 \

    hline

    2 & $c_2$ & $sum{ j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum{ j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum{ j=1}^{n} j - 1$ \ [lex]

    hline

    end{tabular}

    end{center}

share|improve this question

asked 13 hours ago

B. LopB. Lop

82

New contributor

B. Lop is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 13 hours ago

B. LopB. Lop

82

New contributor

B. Lop is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 13 hours ago

B. LopB. Lop

82

New contributor

B. Lop is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 13 hours ago

B. LopB. Lop

82

1 Answer
1

active

oldest

votes

1

Completed code:

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{ || Sc  Sc  Sc  Sc || }

    hline

    Line & Cost & Executions \ 

    hlinehline

    1 & $c_1$ & $n -1$ \

    hline

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    hline

    end{tabular}

    end{center}

end{document}

Changes taken:

1. 
   sum to sum
   


2. 
   { j=1} to _{j=1} (to make j=1 subscript)


3. 
   n to n. n is undefined, hence the compilation error


4. 
   n -1 to math mode


5. Use cellspace to adjust height of cells instead of manually adding [1ex], etc., which is worse. Btw it is [1ex] instead of [lex]
   

---

Recommended table:

1. Remove all vertical lines


2. Use booktabs, which provides toprule, midrule and bottomrule for beautiful tables


3. Make phantom height so that all rows have the same height

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

usepackage{booktabs}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{Sc  Sc  Sc  Sc}

    toprule

    Line & Cost & Executions \ 

    midrule

    1 & $c_1$ & $n -1vphantom{sum_{j=1}^n}$ \

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    bottomrule

    end{tabular}

    end{center}

end{document}

share|improve this answer

answered 13 hours ago

JouleVJouleV

11.4k22561

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Maybe the code would be simpler with an array or a matrix environment?
  
  – Bernard
  13 hours ago
  

  
  
  
  

add a comment | 

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1

Completed code:

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{ || Sc  Sc  Sc  Sc || }

    hline

    Line & Cost & Executions \ 

    hlinehline

    1 & $c_1$ & $n -1$ \

    hline

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    hline

    end{tabular}

    end{center}

end{document}

Changes taken:

1. 
   sum to sum
   


2. 
   { j=1} to _{j=1} (to make j=1 subscript)


3. 
   n to n. n is undefined, hence the compilation error


4. 
   n -1 to math mode


5. Use cellspace to adjust height of cells instead of manually adding [1ex], etc., which is worse. Btw it is [1ex] instead of [lex]
   

---

Recommended table:

1. Remove all vertical lines


2. Use booktabs, which provides toprule, midrule and bottomrule for beautiful tables


3. Make phantom height so that all rows have the same height

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

usepackage{booktabs}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{Sc  Sc  Sc  Sc}

    toprule

    Line & Cost & Executions \ 

    midrule

    1 & $c_1$ & $n -1vphantom{sum_{j=1}^n}$ \

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    bottomrule

    end{tabular}

    end{center}

end{document}

share|improve this answer

answered 13 hours ago

JouleVJouleV

11.4k22561

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Maybe the code would be simpler with an array or a matrix environment?
  
  – Bernard
  13 hours ago
  

  
  
  
  

add a comment | 

1

Completed code:

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{ || Sc  Sc  Sc  Sc || }

    hline

    Line & Cost & Executions \ 

    hlinehline

    1 & $c_1$ & $n -1$ \

    hline

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    hline

    end{tabular}

    end{center}

end{document}

Changes taken:

1. 
   sum to sum
   


2. 
   { j=1} to _{j=1} (to make j=1 subscript)


3. 
   n to n. n is undefined, hence the compilation error


4. 
   n -1 to math mode


5. Use cellspace to adjust height of cells instead of manually adding [1ex], etc., which is worse. Btw it is [1ex] instead of [lex]
   

---

Recommended table:

1. Remove all vertical lines


2. Use booktabs, which provides toprule, midrule and bottomrule for beautiful tables


3. Make phantom height so that all rows have the same height

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

usepackage{booktabs}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{Sc  Sc  Sc  Sc}

    toprule

    Line & Cost & Executions \ 

    midrule

    1 & $c_1$ & $n -1vphantom{sum_{j=1}^n}$ \

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    bottomrule

    end{tabular}

    end{center}

end{document}

share|improve this answer

answered 13 hours ago

JouleVJouleV

11.4k22561

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Maybe the code would be simpler with an array or a matrix environment?
  
  – Bernard
  13 hours ago
  

  
  
  
  

add a comment | 

Completed code:

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{ || Sc  Sc  Sc  Sc || }

    hline

    Line & Cost & Executions \ 

    hlinehline

    1 & $c_1$ & $n -1$ \

    hline

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    hline

    end{tabular}

    end{center}

end{document}

Changes taken:

1. 
   sum to sum
   


2. 
   { j=1} to _{j=1} (to make j=1 subscript)


3. 
   n to n. n is undefined, hence the compilation error


4. 
   n -1 to math mode


5. Use cellspace to adjust height of cells instead of manually adding [1ex], etc., which is worse. Btw it is [1ex] instead of [lex]
   

---

Recommended table:

1. Remove all vertical lines


2. Use booktabs, which provides toprule, midrule and bottomrule for beautiful tables


3. Make phantom height so that all rows have the same height

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

usepackage{booktabs}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{Sc  Sc  Sc  Sc}

    toprule

    Line & Cost & Executions \ 

    midrule

    1 & $c_1$ & $n -1vphantom{sum_{j=1}^n}$ \

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    bottomrule

    end{tabular}

    end{center}

end{document}

share|improve this answer

answered 13 hours ago

JouleVJouleV

11.4k22561

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{ || Sc  Sc  Sc  Sc || }

    hline

    Line & Cost & Executions \ 

    hlinehline

    1 & $c_1$ & $n -1$ \

    hline

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    hline

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    hline

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    hline

    end{tabular}

    end{center}

end{document}

documentclass{article}

usepackage{amsmath}

usepackage{cellspace}

usepackage{booktabs}

setlength{cellspacetoplimit}{2pt}

setlength{cellspacebottomlimit}{2pt}

begin{document}

    begin{center}

    begin{tabular}{Sc  Sc  Sc  Sc}

    toprule

    Line & Cost & Executions \ 

    midrule

    1 & $c_1$ & $n -1vphantom{sum_{j=1}^n}$ \

    2 & $c_2$ & $sum_{j=1}^{n} j$ \

    3 & $c_3$ & $sum_{j=1}^{n} j - 1$ \

    4 & $c_4$ & $sum_{j=1}^{n} j - 1$ \

    bottomrule

    end{tabular}

    end{center}

end{document}

share|improve this answer

answered 13 hours ago

JouleVJouleV

11.4k22561

answered 13 hours ago

JouleVJouleV

11.4k22561

answered 13 hours ago

JouleVJouleV

11.4k22561