CALCULATING DISSIMILARITY INDICES |
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Inspect "test.out" using WORDPAD. The first few rows should look like this Sample ID Rank Analog ID Distance Core ID Latitude degrees Latitude minutes Longitude degrees Longitude minutes SST cool SST warm A152 84 0 A152 84 0.000000 A152 84 44 21 -30 -16 13.00 20.00 A152 84 1 V 29176 0.078629 V 29176 40 33 -26 -00 14.30 21.40 A152 84 2 V 28 89 0.094749 V 28 89 44 32 -32 -35 13.10 20.20 A152 84 3 V 29178 0.097287 V 29178 42 50 -25 -09 13.40 20.30 A152 84 4 V 29177 0.098706 V 29177 41 32 -25 -42 13.90 21.20 A152 84 5 V 29180 0.099928 V 29180 45 18 -23 -52 12.60 19.00 A152 84 6 V 29179 0.115974 V 29179 44 00 -24 -32 13.00 19.60 A152 84 7 V 4 32 0.139953 V 4 32 35 03 -11 -37 15.80 21.50 A152 84 8 AR4-63 0.141011 AR4-63 -39 -50 75 03 12.40 16.40 A152 84 9 V 27192 0.154214 V 27192 -36 -33 -16 -52 13.50 19.60"test.out" is a tab-delimited file, so the labels (top row) do not line-up with the values below. "Sample ID" refers to the fossil sample, "Analog ID" refers to the analog sample being compared. "Distance" is the dissimilarity value computed (squared_chord is stipulated in "run.txt"). The remaining variables are "meta data" describing each analog sample. The Sea Surface temperature for V 28 89 is 13.10 (cool) & 20.20 (warm) oC. Note that the dissimilarity between fossil sample A152 84 and analog sample A152 84 is "0.000000" What is the squared chord distance between A152 84 and V 28 89? |
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You should have answered "0.094749" Edit "run.txt" and replace the dissimilarity measure squared_chordwith squared_euclideanSave the file and rerun ANALOG analog run.txtOpen "test.out" with WORDPAD and inspect the file. Note that the dissimilarity values are much lower. What is the squared_euclidean distance between A152 84 and V 28 89? |
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If your answer is 0.014064 you are ready to proceed |
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If you are interested in the different dissimilarity metrics, read the appropriate portion of the ANALOG.HTML document or consult the publications in the REFERENCES |