Htydjtk

I made this table that after compiling works properly but I got the message above: can anyone please help me in order to understand what is wrong?

begin{tabular}{cp{1.5cm}p{1.5cm}p{1.5cm}p{1.5cm}p{1.5cm}}

    bigskip

    multicolumn{1}{c}{largetextbf{underline{Model}}}&multicolumn{4}{c}{largetextbf{underline{Parameters}}}\

    medskip

    & $mu$ & $alpha$ & $beta$ & $lambda_p$ & $lambda_b$ \ hline

    medskip

    textbf{Poisson} & - & - & - & $2,66times10^{-2}$ & - \ hline 

    medskip

   textbf{ Hawkes} & close to 0 & 3.53 & 3.97 & - & - \ hline

    medskip

    textbf{Branching} & - & - & - & - & $0,13times10^{-2}$ \ hline 

end{tabular}

Two problems:

• your first row only has 1+4=5 columns, while your table has 6 columns




• instead of trying to add skips, I suggest to use addlinespace from the booktabs package

Not strictly speaking a problem, but with 0,13 the spacing around the , will most likely be wrong. I suggest to have a look at the siunitx package

documentclass{beamer}





begin{document}



begin{frame}

begin{tabular}{cp{1.5cm}p{1.5cm}p{1.5cm}p{1.5cm}p{1.5cm}}

%    bigskip

    multicolumn{2}{c}{largetextbf{underline{Model}}}&multicolumn{4}{c}{largetextbf{underline{Parameters}}}\

%    medskip

    & $mu$ & $alpha$ & $beta$ & $lambda_p$ & $lambda_b$ \ hline

    medskip

    textbf{Poisson} & - & - & - & $2,66times10^{-2}$ & - \ hline 

    medskip

   textbf{ Hawkes} & close to 0 & 3.53 & 3.97 & - & - \ hline

    medskip

    textbf{Branching} & - & - & - & - & $0,13times10^{-2}$ \ hline 

end{tabular}

end{frame}



end{document}

Sorry, but medskip does not do what you expect to.

Consider the simple example

documentclass{article}



begin{document}



begin{tabular}{cc}

hline

a & b \

hline

medskip

c & d \

hline

end{tabular}qquad

begin{tabular}{cc}

hline

a & b \

hline

c & d \

hline

end{tabular}



end{document}

and its output

As you see, the vertical space is added below the second row, not between the first and second row.

You want, instead, to use siunitx and booktabs:

documentclass{article}

usepackage{siunitx,booktabs,array}



begin{document}



begin{tabular}{

 >{bfseries}l

 S[table-format=1.2]

 S[table-format=1.2]

 S[table-format=1.2]

 S[table-format=1.2e-1]

 S[table-format=1.2e-1]

}

toprule

multicolumn{1}{c}{textbf{Model}} & multicolumn{5}{c}{textbf{Parameters}}\

cmidrule(r){1-1} cmidrule(l){2-6}

  & $mu$ & $alpha$ & $beta$ & $lambda_p$ & $lambda_b$ \

midrule

Poisson & {--} & {--} & {--} & 2,66e-2 & {--} \

midrule

Hawkes & {close to 0} & 3.53 & 3.97 & {--} & {--} \

midrule

Branching & {--} & {--} & {--} & {--} & 0,13e-2 \

bottomrule

end{tabular}



bigskip



begin{tabular}{

 >{bfseries}l

 S[table-format=1.2]

 S[table-format=1.2]

 S[table-format=1.2]

 S[table-format=1.2e-1]

 S[table-format=1.2e-1]

}

toprule

multicolumn{1}{c}{textbf{Model}} & multicolumn{5}{c}{textbf{Parameters}}\

cmidrule(r){1-1} cmidrule(l){2-6}

  & $mu$ & $alpha$ & $beta$ & $lambda_p$ & $lambda_b$ \

midrule

Poisson & {--} & {--} & {--} & 2,66e-2 & {--} \

Hawkes & {close to 0} & 3.53 & 3.97 & {--} & {--} \

Branching & {--} & {--} & {--} & {--} & 0,13e-2 \

bottomrule

end{tabular}



end{document}

I'd prefer to avoid as many horizontal rules as I can, so I showed also the table without the unnecessary ones.

The second table, with some added vertical space and no boldface:

begin{tabular}{

 l

 S[table-format=1.2]

 S[table-format=1.2]

 S[table-format=1.2]

 S[table-format=1.2e-1]

 S[table-format=1.2e-1]

}

toprule

multicolumn{1}{c}{Model} & multicolumn{5}{c}{Parameters}\

cmidrule(r){1-1} cmidrule(l){2-6}

  & $mu$ & $alpha$ & $beta$ & $lambda_p$ & $lambda_b$ \

midrule

Poisson & {--} & {--} & {--} & 2,66e-2 & {--} \

addlinespace

Hawkes & {close to 0} & 3.53 & 3.97 & {--} & {--} \

addlinespace

Branching & {--} & {--} & {--} & {--} & 0,13e-2 \

bottomrule

end{tabular}   

Removing boldface is good, the additional vertical space is not really important.