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How to plot a graph with two independent coordinates?

Discussion in 'General Electronics' started by Steven, Dec 18, 2003.

  1. Steven

    Steven Guest

    Hi! Could anyone tell me how to plot a graph with two independent coordinates,
    or any reference materials about them?

    Thank you!

    Steven
     
  2. Robert Baer

    Robert Baer Guest

    What you are saying that you do not think that two different
    parameters/variables/sets of measurements are *not* related to each
    other.
    And you want to plot them on the same graph.
    So do that; now if ther are a large number of samples for each
    parameter, then use time as the dependent variable: plot each point so:
    first sample of X on X axis and first sample of Y on Y axis; second
    samples of X and Y in same manner, etc.
    You have preserved ordering of the samples, and one set could have
    been measured last year and the other set taken recently.
    Now if they are truly in-related, you will have a scatter-plot tha
    approaches a uniform greyness (black dots, white background) where
    limits on one axis cannot guarantee a "reasonable" percentage of points
    in the other axis, other than limits beyond three (or more) sigma of
    well-behaved (ie gaussian) processes - which is meaningless.
     
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