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Homestudy translation help

  1. Feb 22, 2016 #1
    Sorry, 30 years since college and I wasn't awake all the time.
    I'm trying to translate the symbology in the attached pics.
    Some of the super/subscripts are throwing me off in formulae 13, 14 and 15.

    Y and X = planar coordinates of points.
    n = number of points.
    σβ = standard error of angle observation.
    σs = standard error of distance observation.
    Σ = the sum in parenthesis.
    Si = sum of distances.

    The parenthesis are the problems.
    Would Xn equal the last coordinate and Xi-1 each proceeding coordinate, so that I should sum the final minus each proceeding X?
    traverse closure 1.jpg

    The same formulae in 3-91.
    traverse closure 2.jpg
     
    Last edited by a moderator: Feb 22, 2016
  2. jcsd
  3. Feb 22, 2016 #2

    Ray Vickson

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    For example:
    [tex] \begin{array}{l}\sum_{i=1}^n \left( \frac{X_i - X_{i-1}}{S_i} \right)^2\\
    = \left(\frac{X_1-X_0}{S_1}\right)^2 + \left(\frac{X_2 - X_1}{S_2}\right)^2 + \cdots + \left( \frac{X_n - X_{n-1}}{S_n}\right)^2
    \end{array}[/tex]
    Is that what you were uncertain about?
     
  4. Feb 22, 2016 #3
    Yes!
    Thank you.
     
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