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%%Reading in Data and setting Constants

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load('planets.mat');

%%The data are stored in the planets.mat file.

%%run this code and check out the Workspace to see what gets loaded in.

%%Here is the information you need:

%names_pl - a cell array storing the names of each planet

%rad - an array of doubles storing the radius of each planet in miles

%orb - an array of each planet's orbit in days

%temp - an array of each planet's equilibrium temperature in Kelvin

%dist - an array of the distance from each planet to its sun in

%units of Solar Radius

rad_earth=3959; %miles

rad_superearth=2*rad_earth; %miles

rad_neptune=15299; %miles

rad_jupiter = 43441; %miles

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%%Part 1 - Bin planets by size

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bin=zeros(1, 5); %initialiing the arrays of bins

%(1)the first index should hold number of planets with

%a radius less than or equal to the earth's radius

%(2)the second index should hold the number of planets

%with a radius greater than earth's radius and less

%than or equal to super earth's radius

%(3)(4)(5)etc.

%TO DO: Fill this in

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%%Part 2 - find habitable planets

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ind_habitable=[]; %fill this array with the indices of all planets

%that are potentially habitable

habitable_exoplanets = []; %fill this array with the names of all

%planets that are potentially habitable

%TO DO: Fill this in

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%%Part 3a - remove planets without size data

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remove = []; %fill this array with all indices of planets that

%do not have size data (have a radius=NaN)

%you will use this array to remove all these elements

%from rad and names_pl (change these arrays)

%TO DO: Fill this in

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%%Part 3b - sort planets by size

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ind_sort = []; %fill this array with all indices sorted by

%size from largest to smallest. For example

%array = [4.0 5.4 3.1 2.8 6.4], then

%ind_sort = [5 2 1 3 4]

names_pl_sorted = []; %fill this array with the names of the

%planets (only the ones with non-NaN

%sizes) in sorted order from largest

%to smallest;

%TO DO: Fill this in