arrays - I want to convert the char matrix into numbers in matlab

Question

I want to convert the string into numbers for example x=[abacaaaabb] I want to assign values a=1 b=2 and c=-1 and store in new matrix x=[1 2 1 -1....}

Answer 1

您可以创建映射：

map = zeros(1,256);
map('abc') = [1, 2, -1];

然后你可以用你的输入索引它：

x = 'abacaaaabb';
mx = map(x);

Answer 2

一种更简单的方法（除非您的映射确实必须像您的示例中那样任意）：

x=['abacaaaabb'];

数量 = x - 96

结果是

num =

     1     2     1     3     1     1     1     1     2     2