radius and co-ordinates changes on every run with four sets venn diagram

[moglideveloper]

Context :
Trying to create some venn diagram animation using R. https://github.com/moglideveloper/animation

---

Attempt 1 (with two sets):
Knit animation/with2Sets/animation.Rmd and open
generated animation.html in browser.
It gives a satisfactory animation (refer below)

---

Attempt 2 (with four sets):
Knit animation/with4Sets/animation.Rmd and open
generated animation.html in browser.
Animation is not satisfactory (refer below)

Looks like every time diagram is generated for four sets, co-ordinates and
radius of Venn diagram changes.

---

To confirm, that co-ordinates and radius of Venn diagram
changes on every run, try executing executeThisFileMultipleTimes.R
multiple times and verify the generated diagram.
Refer below sample generated diagrams :

---

Question:

How we can make sure, that co-ordinates and radius of Venn diagrams,
doesn't changes on every draw ?
https://github.com/moglideveloper/animation

[jolars]

Have you tried using set.seed() to fix the pseudo-random number generator? eulerr uses random initial starting positions, which means that each fit of the diagram is likely to be different.

There are a few normalization routines, which for instance ensure that two-set diagrams remain the same, but this doesn't work exactly the same for diagrams with more sets.

Can you please try to use set.seed() before calling euler(), setting it to the same value each time, please? I am not 100% sure that it will resolve the issue perfectly, but please try this first.

[moglideveloper]

As suggested, set.seed solved this.

Thanks