python基本统计方法
基本统计方法
通过用户输入一组数据(用户一个一个输入),然后计算数据的中位数/平均值/方差/求和
nums = []
while True:
num1 = input('请输入你需要输入的数字(输入 q 退出):')
if num1 == 'q':
break
nums.append(int(num1))
求和
def get_sum(nums):
count = 0
for i in nums:
count += int(i)
return count
count = get_sum(nums)
print('count:',count)
平均数
def get_average(nums):
count = get_sum(nums)
average_count = count/len(nums)
return average_count
average_count = get_average(nums)
print(average_count)
方差
def get_variance(nums):
average_count = get_average(nums)
variance_count = 0
for i in nums:
variance_count += pow(i-average_count,2)
return variance_count
variance_count = get_variance(nums)
print(variance_count)
中位数
def get_median(nums): # ['123', '32', '123', '234']
# 0 1 2 3
nums.sort()
nums_len = len(nums)
if nums_len % 2 == 0:
print((nums[int(nums_len / 2 - 1)] + nums[int(nums_len / 2)]) / 2)
else:
print(nums[nums_len // 2])
get_median(nums)
