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Thank you, Augi!
I have a TI-83 graphing calculator. I know nothing about matrices. I really appreciate your help.
Here's a bit about my data:
I have 8 soil types. 83 locations total where the soil was collected. Two of the soil types only occur once. The rest have anywhere from 5 to 20 occurances.
I have 9 "average percipitation ranges". 83 locations. "average percipitation ranges" occur anywhere from 4 to 30 times each. (ie- 4 locations have 2000cm of precipitation/year, 30 locations have 4300cm/year).
I have 2 "average temperature ranges". 83 locations. One "average temperature range" occurs in 5 locations, another 79 locations.
I have presence/absence data for my plant for these 83 locations. Absent in 23 locations, present in 60 locations.
I'd like to make a predictive model of where you're likely to find my plant on the entire island, based on what I can gather from temperature, soil, and precipitation data.
What would X, R, and n be?
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"Sometimes I have to remember that things are brought to me for a reason, either for my own lessons or for the benefit of others." Cynthetiq
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