> s_complete$Dotcounting_SNB[s_complete$Dotcounting_SNB == "missing"] <- NA > table(s_complete$Dotcounting_SNB) A-B-C-D A-C-B-D A-D-B-C B-A-C-D B-A-D-C B-C B-C-D-A D-C-B-A missing 2711 80 80 159 80 80 80 159 0
### Compute the number of errors and number of error-free sentences