%'stra2num': transform letters (a, b, c) or numerical strings ('1','2'..) to the corresponding numbers %-------------------------------------------- % function numres=stra2num(str) % % OUTPUT: % numres: number (double) % % INPUT: % str: string corresponding to a number or a letter 'a' 'b',.., otherwise the output is empty % % see also num2stra, name_generator, name2display function numres=stra2num(str) numres=[]; %default if double(str) >= 48 & double(str) <= 57 % = test for number strings numres=str2num(str); elseif double(str) >= 65 & double(str) <= 90 % test on ascii code for capital letters numres=double(str)-64; %change capital letters to corresponding number in the alphabet elseif double(str) >= 97 & double(str) <= 122 % test on ascii code for small letters numres=double(str)-96; %change small letters to corresponding number in the alphabet end