Cfrgtkky

How do I draw my table with the column lines only in the first row? Here's a MWE of my code:

documentclass[12pt,a4paper]{article}



usepackage[utf8]{inputenc}

usepackage{float}

usepackage[table]{xcolor}



begin{document}

    begin{table}[H]

        centering

        caption{Data of subways in Fortal city}

        rowcolors{1}{gray!20}{white}

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

            hline

            Line    & Extension & Stations  & Vehicle type \

            hline

            South   & 24,1 km   & 19        & Electric \

            West    & 19,5 km   & 10        & VLT a diesel \

            Parangaba-Mucuripe  & 13,2 km   & 10    & VLT a diesel \

            East    & 7,3 km    & 11        & VLT a diesel \

            hline

        end{tabular}

    end{table}

end{document}

What I'd like to achieve:

It's an easy trick using the multicol package. I removed the columns in my tabular agument but I drew them back, only in the header, using multicolumn{1}{c|}{text}

Here's the full working code:

documentclass[12pt,a4paper]{article}



usepackage[utf8]{inputenc}

usepackage{float}

usepackage[table]{xcolor}

usepackage{multicol}



begin{document}

    begin{table}[H]

        centering

        caption{Data of subways in Fortal city}

        rowcolors{1}{gray!20}{white}

        begin{tabular}{cccc}

            hline

            multicolumn{1}{c|}{Line}    & multicolumn{1}{c|}{Extension} & multicolumn{1}{c|}{Stations}  & Vehicle type \

            hline

            South   & 24,1 km   & 19        & Electric \

            West    & 19,5 km   & 10        & VLT a diesel \

            Parangaba-Mucuripe  & 13,2 km   & 10    & VLT a diesel \

            East    & 7,3 km    & 11        & VLT a diesel \

            hline

        end{tabular}

    end{table}

end{document}

Notice that for this particular problem I don't need to draw a column c| in the last column. Otherwise it'd turned into a border, which I don't want to happen.

Furthermore, to avoid always writing multicolumn{1}{c|}{text} I defined a new command topr{} as newcommand{topr}[1]{multicolumn{1}{c|}{#1}} which spare me to write fixed values. So the improved code turned out like this:

documentclass[12pt,a4paper]{article}



usepackage[utf8]{inputenc}

usepackage{float}

usepackage[table]{xcolor}

usepackage{multicol}

newcommand{topr}[1]{multicolumn{1}{c|}{#1}}



begin{document}

    begin{table}[H]

        centering

        caption{Data of subways in Fortal city}

        rowcolors{1}{gray!20}{white}

        begin{tabular}{cccc}

            hline

            topr{Line}    & topr{Extension} & topr{Stations}  & Vehicle type \

            hline

            South   & 24,1 km   & 19        & Electric \

            West    & 19,5 km   & 10        & VLT a diesel \

            Parangaba-Mucuripe  & 13,2 km   & 10    & VLT a diesel \

            East    & 7,3 km    & 11        & VLT a diesel \

            hline

        end{tabular}

    end{table}

end{document}