>)i=find(u>=a'&u<='z); find is a very powerful function >)u(i=setstr(u(1)-(a'-A)) IF A WOODCHUCK COULD CHUCK WOOD 事实上,如在37节所描述的,矩阵能由单个下标标识。而不是由行和列下标标识,所 以上面例子对字符串矩阵ⅴ也同样适用 Character strings having more than one row must have the same number of column just like matrices >ifind(>=a&v<=z); here i is a single index vector into v, >)V(i)=setstr(v(i)-(a'-A)) o and matrix keeps the same orientation CHARACTER STRINGS HAVING MORE THAN ONE ROW MUST HAVE THE SAME NUMBER OF COLUMN JUST LIKE MATRICES! 最后,当使用前面脚本文件这一章节中的函数 input时,字符串是很有用的 >>t Enter number of rolls of tape Enter number of rolls of tape >5 tape 另外,函数 input能输入一个字符串 >)x=input( Enter anything>,s) Enter anything >anything can be entered anything can be entered 这里,在函数 input里的附加参量’s告诉 MATLAB,作为一个字符串,只要把用户输 入传送到输出变量,就不需要引号。事实上,如果将引号包括进去,它们就变成返回字符串 的一部分。» i=find(u>=' a ' & u<= ' z '); % find is a very powerful function! » u(i)=setstr(u(i)-(' a '-' A ')) u = IF A WOODCHUCK COULD CHUCK WOOD, 事实上，如在 3.7 节所描述的，矩阵能由单个下标标识。而不是由行和列下标标识，所 以上面例子对字符串矩阵 v 也同样适用： » disp(v) Character strings having more than one row must have the same number of column just like matrices! » i=find(v>=' a ' & v<=' z '); % here i is a single index vector into v, » v(i)=setstr(v(i)-(' a '-' A ')) % and matrix keeps the same orientation. v = CHARACTER STRINGS HAVING MORE THAN ONE ROW MUST HAVE THE SAME NUMBER OF COLUMN JUST LIKE MATRICES! 最后，当使用前面脚本文件这一章节中的函数 input 时，字符串是很有用的。 » t=' Enter number of rolls of tape > ' ; » tape=input(t) Enter number of rolls of tape > 5 tape = 5 另外，函数 input 能输入一个字符串： » x=input(' Enter anything > ',' s ') Enter anything > anything can be entered x = anything can be entered 这里，在函数 input 里的附加参量’s’告诉 MATLAB，作为一个字符串，只要把用户输 入传送到输出变量，就不需要引号。事实上，如果将引号包括进去，它们就变成返回字符串 的一部分