2_11_ave_algorithim.py

# 2 11 Arithmetic
''' Algorithm
Average is the Sum of the values divided by the number of items, the Count.
Using the list of data
Count the number of items
Add all the items together
Calculate the Average

A list of numbers numbers is supplied.
Loop through the list to count the number of items as *count_n*
Loop through the list to add all the numbers together as *add*
Calculate the average as =  *add/count_n*

Extra
Loop through the list to find the greatest number as biggest
Loop through the list to find the smallest number as smallest
Calculate mean = (biggest + smallest) /2
'''

#daily watermeter readings
list = [0.06, 1.29, 0.70, 0.76, 0.08, 0.85, 0.79, 0.57, 0.68]
print("list =",list)
print("Low readings probably due to municipal water not available.")
print("High meter reading probably due to filling tanks after a shortage.")


#*   Count = number of items in the list like len()
count = 0
for item in list:
 count += 1

print("Count of items =", count) # Answer to be 15


#* Add = sum of value of  items
add = 0
for item in list:
    add = add + item

print("List Adds up to =", add)     # Answer to be 40


#* Occurence = number of times each unique item appears.
occur = {}
for item in list:
    occur[item] = occur.get(item, 0) + 1
print("Item : Occurs",occur)


#*   Smallest item
smallest = 1 # what if smallest in list is < 1
for item in list:
    if item < smallest:
        smallest = item

print("Smallest item:", smallest)


#*  Biggest item
biggest = 0
for item in list:
    if item > biggest:
        biggest = item

print("Biggest item :", biggest)


#* Average *; sum/count
ave = add/count
print("Average :",ave)


# mean = (min + max)/ 2.  is a handy rapid mental calculation; close enough.
minmax = smallest + biggest
mean = (smallest + biggest)/2
print("mean = (min + max)/2 =", mean)

''' >>>
list = [0.06, 1.29, 0.7, 0.76, 0.08, 0.85, 0.79, 0.57, 0.68]
Low readings probably due to municipal water not available.
High meter reading probably due to filling tanks after a shortage.
Count of items = 9
List Adds up to = 5.779999999999999
Item : Occurs {0.68: 1, 0.79: 1, 1.29: 1, 0.76: 1, 0.06: 1, 0.08: 1, 0.57: 1, 0.7: 1, 0.85: 1}
Smallest item: 0.06
Biggest item : 1.29
Average : 0.6422222222222221
mean = (min + max)/2 = 0.675
>>>   '''