[Tex/LaTex] Table – Extra alignment tab has been changed to \cr

errors

What is the real problem with this table?

\begin{table}[h]
\centering

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

B & F & P & C &  $B \lor F$ & $P \lor C$ & $\neg(F \land C)$ & $\neg(B \land P)$
T & T & T & T & T & T & F & F \\ % Error l.37 T & T & T & T & T & T & F & F \\ ?
T & T & T & F & T & T & T & F \\
T & T & F & T & T & T & F & T \\
T & T & F & F & T & F & T & T \\
T & F & T & T & T & T & T & F \\ 
T & F & T & F & T & T & T & F \\
T & F & F & T & T & T & T & T \\
T & F & F & F & T & F & T & T \\
F & T & T & T & T & T & F & T \\
F & T & T & F & T & T & T & T \\
F & T & F & T & T & T & F & T \\
F & T & F & F & T & F & T & T \\
F & F & T & T & F & T & T & T \\
F & F & T & F & F & T & T & T \\
F & F & F & T & F & T & T & T \\
F & F & F & T & F & T & T & T \\
\end{tabular}

\end{table}

Best Answer

In addition to inserting the missing \\ line break instruction, you should contemplate undertaking the following steps:

Implement fully the suggestions @egreg made with regard to your earlier posting, inluding the use of array instead of tabular and the use of macros rather than hard-coded letters for "True" and "False". (Do also think hard why you're using the letter F both as a variable and as the token for "false". Is it so difficult to come up with a better variable name than "F"?)
Get rid of all vertical bars, and use the line-drawing macros of the booktabs package to insert a few but well-spaced horizontal lines.
Add a bit of extra vertical whitespace after every fourth row in the body of the table, since four rows at a time provide a natural grouping for the table at hand.

enter image description here

\documentclass{article}
\usepackage{booktabs}
\newcommand\T{\textrm{T}}  % "true"
\newcommand\F{\textrm{F}}  % "false"
\begin{document}
\begin{table}[h]
\centering
$\begin{array}{ *{8}{c} }
\toprule
B & F & P & C & B \lor F & P \lor C & \neg(F \land C) & \neg(B \land P)\\
\midrule
\T & \T & \T & \T & \T & \T & \F & \F \\ 
\T & \T & \T & \F & \T & \T & \T & \F \\
\T & \T & \F & \T & \T & \T & \F & \T \\
\T & \T & \F & \F & \T & \F & \T & \T \\[1ex]
\T & \F & \T & \T & \T & \T & \T & \F \\
\T & \F & \T & \F & \T & \T & \T & \F \\
\T & \F & \F & \T & \T & \T & \T & \T \\
\T & \F & \F & \F & \T & \F & \T & \T \\[1ex]
\F & \T & \T & \T & \T & \T & \F & \T \\
\F & \T & \T & \F & \T & \T & \T & \T \\
\F & \T & \F & \T & \T & \T & \F & \T \\
\F & \T & \F & \F & \T & \F & \T & \T \\[1ex]
\F & \F & \T & \T & \F & \T & \T & \T \\
\F & \F & \T & \F & \F & \T & \T & \T \\
\F & \F & \F & \T & \F & \T & \T & \T \\
\F & \F & \F & \T & \F & \T & \T & \T \\
\bottomrule
\end{array}$
\end{table}
\end{document}

Related Solutions

[Tex/LaTex] Error: extra alignment tab has been changed to \cr

The error can be reproduced by

\documentclass{article}

\begin{document}

\begin{tabular}{c|c}
one & two & three \\
\hline
one & two 
\end{tabular}
\end{document}

The problem is caused by the extra column you try to insert. The tabular environment expects two columns but three is inserted.

[Tex/LaTex] Table error – Extra alignment tab has been changed to \cr

Here are some suggestions on how you may want to streamline your code:

Use left- and right-clipping of the \cmidrule lines to better;
there's no need to use a center environment because the width of the tabularx environment is set to \textwidth;
don't typeset units of measurement in math italics -- consider using the \si macro of the siunitx package instead;
when using a smaller-than-normal font size for a table, do also consider reducing the amount of intercolumn whitespace: for the table at hand, a combination of \small (instead of \footnotesize) and setting \tabcolsep (the parameter that governs the amount of intercolumn whitespace) to 4pt (default: 6pt) would seem to yield a more-readable table.
The first column may look better if you use l instead of Y as the column type.

\documentclass{article}

\usepackage{tabularx,booktabs}
\newcolumntype{Y}{>{\centering\arraybackslash}X}

\usepackage[per-mode=symbol]{siunitx} % for typesetting scientific units

\begin{document}

\begin{table}
\setlength\tabcolsep{4pt} % default value: 6pt
\small  % not: "\footnotesize"

\begin{tabularx}{\textwidth}{@{} l *{6}{Y} @{}}
\toprule
\textbf{Style} & \multicolumn{2}{c}{\textbf{Yarn}} &
\multicolumn{2}{c}{\textbf{Count}} & \textbf{Weight} & \textbf{Thickness} \\
\cmidrule(lr){2-3} \cmidrule(lr){4-5}
& Warp & Fill & Ends & Picks & [\si{\gram\per\meter\squared}] & [\si{\milli\meter}]\\
\midrule
Plain & TR 30S 3L & TR 30S 3L & 4.87 & 4.87 & 200 & 0.23 \\
\bottomrule
\end{tabularx}

\caption{Main Properties of wowen fabric.}
\end{table} 

\end{document}

Just for comparison, here's the look of the table that's produced by the code you presented in your answer:

Best Answer

Related Solutions

[Tex/LaTex] Error: extra alignment tab has been changed to \cr

[Tex/LaTex] Table error – Extra alignment tab has been changed to \cr

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