latex表格斜杠

egin{table} centering caption{This is a visual sample.} egin{tabular}{c|ccccc} oprule diagbox {Sample}{Size} & 1 & 2 & 3 & 4 & {f 5} \ hline A & 0.22 & 0.32 & 0.76 & 0.34 & {f 0.77} \ B & 0.23 & 0.12 & 0.75 & 0.45 & {f 0.97} \ C & 7.45 & 6.56 & 6.65 & 6.98 & {f 5.78} \ ottomrule end{tabular} label{tab:Training_sizes} end{table}