Remove similar numbers in a list

Question

How do I remove numbers like 86.1 and 90.1 (or 86.2 and 90.2) from the following list?

86.1      86.2       90.1      90.2

Define a tolerance value as `tolerance = 3`, Now divide each element with this value and again multiply with the same now use `set` to get the desired results — ZdaR, Sep 17 '16 at 06:57
How do you define similar? Which one will be removed if two are similar? — Jeon, Sep 17 '16 at 08:28

score 0 · Accepted Answer · answered Sep 17 '16 at 07:04

Define a threshold, iterate over the sorted numbers and add up the numbers within the threshold:

numbers = [86.1, 86.2, 90.1,90.2]

threshold = 1
numbers = iter(numbers)
amount = last = next(numbers)
count = 1
result = []
for number in sorted(numbers):
    if number - last > threshold:
        result.append(amount/count)
        amount = count = 0
    amount += number
    count += 1
    last = number

result.append(amount/count)

score 0 · Answer 2 · edited May 23 '17 at 12:32

0

Try this:

base = [86.1, 86.2, 90.1, 90.2]
# remove = [86.2, 90.2]
remove = [86.1, 90.1]

new_list = [item for item in base if item not in remove]
print(new_list)

In Stack Overflow post Remove list from list in Python you have more information.

edited May 23 '17 at 12:32

Community

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answered Sep 17 '16 at 08:09

EdCornejo

741
13
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score 0 · Answer 3 · answered Sep 17 '16 at 10:00

0

inputList=[86.1, 86.2, 90.1, 90.2]

tolerance=1.0
out=[]
for num in inputList:
    if all([abs(num-outAlready)>tolerance for outAlready in out]):
        out.append(num)

print out

answered Sep 17 '16 at 10:00

Emilio M Bumachar

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3
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Remove similar numbers in a list

3 Answers3