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First off, I'm kind of out of my element when it comes to formulas and figuring out how to come up with a formula for what I need. If you need any other information, let me know and I'll add it.

Scenario:

I need to determine the opacity percentage of these elements that I'm plotting on a map. Now, my scale of 0-100 is really 0.05-0.85. It's relative to the number of days since an event has happened. Meaning, if an event happened 0 days ago, the opacity should be 0.05, and if an event happened 365 days ago, the opacity should be 0.85. How do I form a formula to get the values in between?

Brandon
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    This is answered in a few hundred posts, directly or indirectly. The duplicate has one of the higher voted answers I could find quickly. For more, see https://stats.stackexchange.com/search?q=normalize. – whuber Nov 10 '17 at 22:20

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