How to find coordinate averages from specific lines?-CodePudding

I have a function where I need to read every line that begins with the phrase "ABC", and for each ABC line there are xyz coordinates that follow it. How do I go about obtaining the average xyz coordinates overall by reading the correct line but not the actual ABC part itself?

So far I have the ability to print the lines but I'm confused on how to actually take them and the average Example line: "ABC 2.7826876194262695 5.6965460623956972 -2.4674016174576252" Code so far:

with open("filename",'r') as f:
    for line in f:
        if line.startswith("ABC"):
          print(line)

CodePudding user response：

This? (untested)

with open("filename",'r') as f:
    N = 0
    X = 0
    Y = 0
    Z = 0
    for line in f:
        try:
            start, x, y, z = line.strip().split()
            if start == "ABC":
                N  = 1
                X  = float(x)
                Y  = float(y)
                Z  = float(z)
        except:
            pass
    X /= N
    Y /= N
    Z /= N

CodePudding user response：

You can split on space and take everything after the first element.

sums = [0] * 3
points = 0
for line in f:
    if line.startswith("ABC "):
        points  = 1
        for i, x in enumerate(line.split()[1:]):
            sums[i]  = float(x)
avg = [s / points for s in sums]
print(avg)