Grandyang

摘要： Matlab是矩阵运算的神器，所以可以很轻易的交换任意行或列，而且写法非常简洁，如下所示：a = [1 2 3; 4 5 6; 7 8 9];b = a;b(:,[1;2]) = b(:,[2;1]); % Swap col 1 and 2c = a;c([1;2],:) = c([2;1],:);... 阅读全文

摘要： 4.9 You are given a binary tree in which each node contains a value. Design an algorithm to print all paths which sum to a given value. The path does 阅读全文

摘要： 在MatLab中，我们有时要给画出的点按一定顺序标上序号，下面这个简单的例子实现这个功能：x=rand(1,10);y=rand(1,10);plot(x,y,'r*');text(x+0.02,y,num2cell(1:10)); 阅读全文