matlab代码怎么矢量化

使用for循环以两种形式计算和显示每次消费的总费用列：一列表示消耗的天然气，另一列表示总费用。
这个分段函数代码怎么进行矢量化

这个分段函数的矢量化版本可能是这样的：

a = input('Please input a unit:') % Enter the unit of natural gas consumed

b = zeros(size(a)) % Initialize b to be the same size as a with all elements set to 0

ind1 = a <= 50 % Find the indices of elements in a that are less than or equal to 50
ind2 = a > 50 & a <= 180 % Find the indices of elements in a that are greater than 50 and less than or equal to 180
ind3 = a > 180 % Find the indices of elements in a that are greater than 180

b(ind1) = 0.5 .* a(ind1) % If 50 units or fewer are consumed, the cost is $0.5 per unit.
b(ind2) = a(ind2) - 25 % If more than 50 but not more than 100 units are consumed, the cost is $25 for the first 50 units.
b(ind3) = 75 + 2 .* (a(ind3) - 100) % If more than 100 units are consumed, the cost is $75 for the first 100 units plus $2 for each additional unit.

disp(b) % Display the total cost for each consumption of natural gas

这样就可以对整个a数组进行同时计算并显示结果了。