MATLAB read txt file

Use importdata function

data = importdata("123.txt",'',1000)

%读取文件，从第1行一直到第1000行

Practical application

data = importdata("123.txt",'',10000)
%读取

[m n]= size(data)

%寻找含有%的地方

for i =1:m
    temp = find(data{i}=='%')
    if isempty(temp)
        t(i) = 0
    else 
        t(i) = temp
    end
end