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How to filter planets according to conditions using SortBy?

POSTED BY: Peter Burbery
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Dave Middleton
Dave Middleton
Posted 2 years ago

POSTED BY: Dave Middleton

I want to see the radius of the planets that meet the criterion, not the length. I figured out how to get the radius of planets:

planets[planets[All, "Moons", 
  Length@*Select[#Mass/(4/3 \[Pi] #Radius^3) > 
      0.55 (planets["Earth", "Moons", 
           Values, #Mass/(4/3 \[Pi] #Radius^3) &] // Normal // First) &]][Select[# > 0 &]]//Keys//Normal,"Radius"]
POSTED BY: Peter Burbery
Rohit Namjoshi
Rohit Namjoshi
Posted 2 years ago

Maybe this?

planets[All, "Moons", 
  Length@*Select[#Mass/(4/3 \[Pi] #Radius^3) > 
      0.55 (planets["Earth", "Moons", 
           Values, #Mass/(4/3 \[Pi] #Radius^3) &] // Normal // First) &]][Select[# > 0 &]]
POSTED BY: Rohit Namjoshi
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