Bonus: get the square root through exponentiation.Get the square roots with a regular for loop.Get square roots with a list comprehension.Calculate square roots from Python list values.Example: calculate the integer square root in Python.Get the integer square root: Python’s math.isqrt().Example: get the square root in Python with math.sqrt().Get the precise square root: Python’s math.sqrt() function.Get the square root in Python: three options.
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See Info tab for full copyright and license. Setup-constants so that carrying-capacity can be used as upper bound of number-people slider end Copyright 1998 Uri Wilensky. If age duration If the turtle has survived past the virus' duration, then to get-older turtle procedure Turtles die of old age once their age exceeds the lifespan (set at 80 years in this model). If not watch-a-person? and subject != nobodyĮnd Turtle counting variables are advanced. Set %immune (count turtles with / count turtles) * 100 ]
Set immunity-duration 4 * 7 4 weeks for immunity duration Set chance-reproduce 0.34 birth rate per 1000 people per week Set lifespan 80 * 52 * 7 80 times 52 weeks times 7 days = 50 years = 2600 weeks old = 18200 days Number-dead ] how many turtles die The setup is divided into four procedures to setupĮnd We create a variable number of turtles of which 1 are infectious, and distribute them randomly to setup-turtlesĪsk my-links remove link to turtle who infected us, if there was one end This sets up basic constants of the model. Would highly appreciate it if anyone could clear my confusion! To what extent would this reflect reality? (Don't want to make my readers who actually go run the model panic.) The death numbers are strikingly high in so many scenarios. What is its unit and how is it calculated? Is it relative or definite?Ĥ. While the default movement is 5, I found that the range of the slider is set between 0.25 and 1. I wonder if this is consistent with your findings?ģ. Based on my limited trials, I found that lowering the movement of the agents and decreasing the population density together is the most effective strategy to control COVID-19, and is consistent with social-distancing & self-quarantine that is being recommended by most of the experts that I've heard of. As the range of basic reproduction number of COVID-19 is around 1.4~3.9, I assumed that the "infectiousness" parameter is referring to BRN, and set it at the upper bar. I want to write an article in Chinese to introduce this model to readers in Taiwan and to discuss how might changing our collective behaviors (the input parameters) impact the outcomes we face during this crisis.īut before writing it, I'd like to clarify my understanding:ġ. And I changed Units = % -&rt Units = The setup is divided into four procedures Immunity-duration how many weeks immunity lasts %immune what % of the population is immuneĬhance-reproduce the probability of a turtle generating an offspring each tickĬhance-recover the probability of recovery at each tickĬarrying-capacity the number of turtles that can be in the world at one time [ %infected what % of the population is infectious Sick-time how long, in days, the turtle has been infectiousĪge ] how many weeks old the turtle is Remaining-immunity how many weeks of immunity the turtle has left [ sick? if true, the turtle is infectious The file extracted looks OK, a 28.1kB text file eg I still get 'An error occurred while extracting files'
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