• 求出体重的均值跟中位数

a = [2 1 3 6 1 3 1 1 3 4 3 2 1];
b = [130 138 145 150 152 155 160 164 165 167 170 172 175];
raw = [];
for i = 1:length(a)
    if a(i) > 0
        new = ones(1,a(i))*b(i);
    else
        new = [];
    end
    raw = [raw,new];
end
aver = mean(raw)
media = median(raw)
sigma = std(raw)

answer:

aver =
  156.9677
media =
   155
sigma =
   12.2651

• 编写一个求概率的脚本：

a = [2 1 3 6 1 3 1 1 3 4 3 2 1];
b = [130 138 145 150 152 155 160 164 165 167 170 172 175];
raw = [];
for i = 1:length(a)
    if a(i) > 0
        new = ones(1,a(i))*b(i);
    else
        new = [];
    end
    raw = [raw,new];
end
aver = mean(raw);
media = median(raw);
sigma = std(raw);
x = input('Please Enter A a Number:');
for i = 1:length(a)
    if x ==b(i)
        p = a(i)/sum(a)
    end
end

• 绘制直方图：

a = [2 1 3 6 1 3 1 1 3 4 3 2 1];
b = [130 138 145 150 152 155 160 164 165 167 170 172 175];
raw = [];
for i = 1:length(a)
    if a(i) > 0
        new = ones(1,a(i))*b(i);
    else
        new = [];
    end
    raw = [raw,new];
end
aver = mean(raw);
media = median(raw);
sigma = std(raw);
area = a/sum(a);
bar(b,area);

• 求体积：

r = input('半径=');
h = input('高：');
V = (pi*r.^2).*h

半径=1
高：5
V =
   15.7080

• while求和

x = input('Please enter an number:');
n = input('Please enter an number:');
i = 0;
sum = 0; 
while i<=n
    sum = sum+x.^i;
    i = i+1;
end
sum

Please enter an number:2
Please enter an number:3

sum =

    15

• for循环求和

```cpp
x = input('Please enter an number:');
r = input('Please enter an number:');
sum = 0;
for i = 0:r
    sum = sum + 1/(x.^i);
end
sum

Please enter an number:2
Please enter an number:2

sum =

    1.7500