Dtyjlui

How to set a width of columns to be centered in vertical direction? Or in vertical and horizontal direction and the cells bellow as well?
Thank you

documentclass[12pt,a4paper]{report}

usepackage{booktabs, makecell, tabularx}

setlengthtextwidth{145mm}

setlengthtextheight{247mm}

setlengthoddsidemargin{15mm}

setlengthevensidemargin{15mm}

setlengthtopmargin{0mm}

setlengthheadsep{0mm}

setlengthheadheight{0mm}

letopenright=clearpage

begin{document}

 begin{table}

small

renewcommand{arraystretch}{1.2}

begin{tabularx}{textwidth}{>{hsize=0.2hsize}X

                             >{hsize=0.25hsize}X

                             >{hsize=0.25hsize}X

                             >{hsize=0.3hsize}X}



Xhline{1.2pt}noalign{vskip 0.4ex}Xhline{1.2pt}%                          

Název souboru&  Průměrná hodnota chyby& makecell{Odchylka určení \ průměrné chyby}&   makecell{Počet středovaných \ bodů}\

Xhline{1.2pt}noalign{vskip 0.4ex}

B & A&  C&  D\  



Xhline{1.2pt}  

end{tabularx}

end{table}



end{document}

Combining renewcommandtabularxcolumn[1]{m{#1}} (from Vertical centering of all columns in tabularx environment) and newcolumntype{C}{>{centeringarraybackslash}X} (from Centering in tabularx and X columns) you can achieve the following:

documentclass[12pt,a4paper]{report}

usepackage{booktabs, makecell, tabularx}





renewcommandtabularxcolumn[1]{m{#1}}

newcolumntype{C}{>{centeringarraybackslash}X}

begin{document}

 begin{table}

small

renewcommand{arraystretch}{1.2}

begin{tabularx}{textwidth}{>{hsize=0.2hsize}C

                             >{hsize=0.25hsize}C

                             >{hsize=0.25hsize}C

                             >{hsize=0.3hsize}C}



    Xhline{1.2pt}noalign{vskip 0.4ex}Xhline{1.2pt}%                          

 Název souboru&  Průměrná hodnota chyby& Odchylka určení průměrné chyby&   Počet středovaných  bodů\

Xhline{1.2pt}noalign{vskip 0.4ex}

B & A&  C&  D\



Xhline{1.2pt}  

end{tabularx}

end{table}



end{document}

Please keep in mind that I have removed the makecell cmmands as they distorted the vertical alignment. If you need to place the linebreaks manually, you can either use makecell[cc]{<text>} in every column header (as suggested by Paul Stanley in the comments) or replace newcolumntype{C}{>{centeringarraybackslash}X} by newcolumntype{C}{>{centeringletnewline\arraybackslash}X} and use newline where you want the linebreak to appear.

Improving a bit upon the nice solution of @leandriis, I would also remove all manual rule width manipulations and just use booktabs macros, they take care of widths and separation nicely. No need for makecell as also stated by leandriis.

If you want to break lines at certain points and used makecell to do that, then you can still use newline for that.

documentclass[12pt,a4paper]{report}

usepackage{booktabs, tabularx}



renewcommandtabularxcolumn[1]{m{#1}}

newcolumntype{C}{>{centeringarraybackslash}X}

begin{document}

 begin{table}

small

renewcommand{arraystretch}{1.2}

begin{tabularx}{textwidth}{>{hsize=0.2hsize}C

                             >{hsize=0.25hsize}C

                             >{hsize=0.25hsize}C

                             >{hsize=0.3hsize}C}

toprule%                          

Název souboru & Průměrná hodnota chyby & Odchylka určení průměrné chyby & Počet středovaných bodů \

midrule

B             & A                      & C                              & D                       \

bottomrule 

end{tabularx}

end{table}



end{document}