35 lines
1.4 KiB
Text
35 lines
1.4 KiB
Text
rt Two ---
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Considering every single measurement isn't as useful as you expected: there's just too much noise in the data.
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Instead, consider sums of a three-measurement sliding window. Again considering the above example:
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199 A
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200 A B
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208 A B C
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210 B C D
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200 E C D
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207 E F D
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240 E F G
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269 F G H
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260 G H
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263 H
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Start by comparing the first and second three-measurement windows. The measurements in the first window are marked A (199, 200, 208); their sum is 199 + 200 + 208 = 607. The second window is marked B (200, 208, 210); its sum is 618. The sum of measurements in the second window is larger than the sum of the first, so this first comparison increased.
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Your goal now is to count the number of times the sum of measurements in this sliding window increases from the previous sum. So, compare A with B, then compare B with C, then C with D, and so on. Stop when there aren't enough measurements left to create a new three-measurement sum.
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In the above example, the sum of each three-measurement window is as follows:
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A: 607 (N/A - no previous sum)
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B: 618 (increased)
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C: 618 (no change)
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D: 617 (decreased)
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E: 647 (increased)
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F: 716 (increased)
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G: 769 (increased)
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H: 792 (increased)
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In this example, there are 5 sums that are larger than the previous sum.
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Consider sums of a three-measurement sliding window. How many sums are larger than the previous sum?
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