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QQ Plot

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- Quantile to Quantile Plot
- Quantile:
- Points taken at regular intervals from the cumulative distribution function (CDF) of a random variable

- QQ Plot:
- Graphical method for comparing two probability distributions by plotting quantiles of their values against each other
- Does not include spatial-temporal information

Wikipedia

- If the data set have 10 values of:
- 3, 6, 7, 8, 8, 10, 13, 15, 16, 20

- 4 quantiles would result in:
- 10 x ¼ = 2.5, rounded to 3 => 7
- 10 x ½ = 5 => 8
- 10 x ¾ = 7.5, rounded to 8 => 15

- Integrate over space and time
- Use topographic surfaces as trends

- Bootstrapping
- Drawing sets of samples, with replacement from the original dataset
- Different results each time

- Jackknifing
- Repeat the estimation leaving out part of the dataset each time
- Repeatable

- Work with any interpolation or trend-surface method