Directions: We want to generate a custom dot for our image-scatter-plot, such that every species gets a unique color. Write a function called species-dot, which takes in a Row from the animals table and returns a solid, 5px circle using black for dog, orange for cat, pink for rabbit, red for tarantula, green for lizard and blue for snail.
Contract and Purpose Statement |
Every contract has three parts…
species-dot::Row->Image
Consumes an animal and produces a solid 5-pixel dot, black if dog, orange if cat, pink if rabbit, red if tarantula, green if lizard and blue if snail.
Examples |
Write some examples, then circle and label what changes…
examples:
__species-dot (dog-row)__ is circle(5, "solid", "black")
__species-dot (cat-row)__ is circle(5, "solid", "orange")
__species-dot (rabbit-row)__ is circle(5, "solid", "pink")
__species-dot (tarantula-row)__ is circle(5, "solid", "red")
__species-dot (lizard-row)__ is circle(5, "solid", "green")
__species-dot (snail-row)__ is circle(5, "solid", "blue")
end
Definition |
Write the definition, giving variable names to all your input values…
fun species-dot(r):
__if (r["species"] == "dog"): circle(5, "solid", "black")
__else if (r["species"] == "cat"): circle(5, "solid", "orange")
__else if (r["species"] == "rabbit"): circle(5, "solid", "pink")
__else if (r["species"] == "tarantula"): circle(5, "solid", "red")
__else if (r["species"] == "lizard"): circle(5, "solid", "green")
__else if (r["species"] == "snail"): circle(5, "solid", "blue")
__end
end
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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