[初学笔记] matlab 中 all, any, strcmp, struct, while loop

1  首先熟悉 strcmp 这个函数

tf = strcmp(s1,s2)

输入

s1 = 'upon';
s2 = {'Once','upon';
      'a','time'};
tf = strcmp(s1,s2)

会得到

tf = 2×2 logical array
   0   1
   0   0

2  好的下面是 all 和 any的用法，详情自己看这个blog

转自 http://www.matlabsky.com/thread-4150-1-1.html

3 用上 struct，以及在循环 while loop里面，减少逻辑运算符号的使用

我们可以这样做

下面是我自己写的代码，亲测可以用

you.gender = input ('\n\n please enter your gender. (f/m/x)\n\n','s');
input1 = 'f';input2 = 'm';input3 = 'x'; % define the input answer
s1 = {input1,input2,input3}; % 3 input strings into the cell
tf = strcmp(you.gender,s1); % compare the input and the right answer
while any (tf) == 0 % if no correct answer(1),then input again
    fprintf('\n\n Error! Invalid input!\n\nPlease enter ''f'' for female, ''m'' for male, ''x'' for third sex.\r\n');
    you.gender = input ('\n\n please enter your gender. (f/m/x)\n\n','s');
end