Labor am Elm

Elm Laboratory

Consulting and Research

Jens Röder

3 minutes read

with Advanced Gompertz Function

All the fits of the data of individual areas are created fully automatically. You may check on the graph (click on the image) if the fit has a sufficient quality, matching the data points as best as possible. There may be some cases, where by too unexpected real data, the fit is not giving a good forecast. So please use common sense to evaluate the data.

Locations or countries with not enough data points or other reasons are skipped and can be found in this list.

The table shows from the left: The maximum last cumulative number, the expected maximum number by fit, graph and location, the T2 also known as doubling time of the exponential growth, the day of turning point of the function.

The turning point is important, showing the turn from purely exponential growth to the process of fading out by limited number of victims.

In the middle of the graph is written the doubling time, that describes the time it needs to double the number of cases. This number is calculated using the logistic function and describes the growth before the turning point, where numbers rise quickly. In a simple picture, the T2 of the Gompertz function describes the later part and the doubling time of the logisitic the first part.

Color code on numbers of infected people: Below 500 , between 500 and 999, between 1000 and 9999, between 10000 and 49999, between 50000 and 99999, above 100000.

Color code on locations describe percentages of last number and expected Nmax: Above 95%, between 90% and 95%, between 80% and 89%, between 70% and 79%, between 60% and 69%, when number of cases is above 50 and Nmax is below 50% or the doubling time is below 3.5 days! Above 130%, a reoccurrence of an outbreak is indicated.

The location color code tells you, how well the Covid-19 outbreak has faded out and is under control (greenish). In red and magenta the areas are on fast rise in numbers. The color code in numbers tells you how severe the outbreak was in that region.

Applied maths is explained here.

If you like to support my work:
(by click on image you accept third party cookies, required by paypal)

Actualisation date: Sun Aug 15 08:40:51 UTC 2021

Click on the down arrow to open content and click on image to enlarge.
Clicking on the name will direct to a page with all images for the country.
Nmax (err) cumulative_inf. infected_daily T2 (err) dturning_point (err)
Adams, North Dakota
223 (±21.2%) 30.559 (±26.9%) 300.68 (±3.0%)
Brown, Nebraska
307 (±10.2%) 42.928 (±7.2%) 314.16 (±1.9%)
Cloud, Kansas
1147 (±65.0%) 33.861 (±54.3%) 321.14 (±8.3%)
Daniels, Montana
161 (±25.4%) 27.413 (±32.2%) 312.17 (±2.8%)
Edgar, Illinois
2592 (±147.7%) 43.338 (±75.2%) 341.87 (±21.9%)
Fallon, Montana
289 (±15.6%) 22.818 (±27.5%) 308.89 (±1.7%)
Harding, South Dakota
87 (±2.8%) 22.213 (±6.1%) 294.84 (±0.4%)
Rawlins, Kansas
312 (±2.9%) 38.105 (±2.6%) 304.50 (±0.5%)
Sheridan, Montana
400 (±27.2%) 26.696 (±35.4%) 312.84 (±2.9%)

For countries in this list, the number of infected people must be at minimum 13 people. In the list of numbers of a country, there must be at least 7 different numbers. The turning point is guessed by using half the maximum number and then looks for the first value above that value. If the turning point is at the last value, the fit is omitted.

Locations or countries with not enough data points or other reasons are skipped and can be found in this list.

    • None
    • None

Recent posts


Elm Laboratory