Re: pls help me with this prog

Discussion in 'Python' started by 88888 Dihedral, Oct 21, 2012.

  1. On Friday, October 19, 2012 4:40:42 PM UTC+8, inshu chauhan wrote:
    > in this prog I have written a code to calculate teh centre of a given 3D data..
    >
    >
    >
    > but i want to calculate it for every 3 points not the whole data, but
    >
    > instead of giving me centre for every 3 data the prog is printing the
    >
    > centre 3 times...
    >
    >
    >
    > import cv
    >
    > from math import floor, sqrt, ceil
    >
    > from numpy import array, dot, subtract, add, linalg as lin
    >
    >
    >
    >
    >
    >
    >
    >
    >
    > def CalcCentre(data):
    >
    > centre = array([0,0,0])
    >
    > count = 0
    >
    > n = 0
    >
    > for p in data[n:n+3]:
    >
    > centre = add(centre, array(p[:3]))
    >
    > count += 1
    >
    > centre = dot(1./count, centre)
    >
    > return centre
    >
    > n += 1
    >
    > def ReadPointCloud(filename):
    >
    > f = open(filename)
    >
    > result = []
    >
    > for l in f:
    >
    > sp = l.split()
    >
    > t = tuple(map(float, sp[1:4]))
    >
    > result.append(t)
    >
    > return result
    >
    >
    >
    > def main (data):
    >
    >
    >
    >
    >
    > j = 0
    >
    > for i in data[:3]:
    >
    > while j != 3:
    >
    > centre = CalcCentre(data)
    >
    > j += 1
    >
    > print centre
    >
    >
    >
    >
    >
    > if __name__ == '__main__':
    >
    > data = ReadPointCloud(r'Z:\data\NEHreflectance_Scanner 1_part.txt')
    >
    >
    >
    > main(data)
    >
    >
    >
    >
    >
    >
    >
    >
    >
    > PLS HELP ;;;;


    # assume data is a list of 3 n numbers, n!=0

    n3=data.length()
    n=n/3
    x=sum(data[0:n3:3])/n
    y=sum(data[1:n3:3])/n
    z=sum(data[2:n3:3])/n #(x,y,z)
     
    88888 Dihedral, Oct 21, 2012
    #1
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