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First half completed #4

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First half completed #4

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8543828
First half completed
qahmad Jul 10, 2017
3b8f778
First attempt at everything except mode
qahmad Jul 10, 2017
bae97d9
First attempt at everything except mode
qahmad Jul 11, 2017
4e8215d
Variance and standard deviation completed
qahmad Jul 11, 2017
85287b9
Mode partially completed
qahmad Jul 11, 2017
41ec54a
Completed
qahmad Jul 11, 2017
cead21d
Completed (getting the last point)
qahmad Jul 11, 2017
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67 changes: 56 additions & 11 deletions app/controllers/calculations_controller.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -83,27 +83,72 @@ def descriptive_statistics
# The numbers the user input are in the array @numbers.
# ================================================================================

@sorted_numbers = "Replace this string with your answer."
# @squared_numbers = []

@count = "Replace this string with your answer."
# @numbers.each do |num|
# square = num * num
# @squared_numbers.push(square)
# end

@minimum = "Replace this string with your answer."
# @sorted_numbers = @squared_numbers

@maximum = "Replace this string with your answer."
####################SORTED NUMBERS####################
@sorted_numbers = @numbers.sort

@range = "Replace this string with your answer."
####################COUNT####################
@count = @numbers.size

@median = "Replace this string with your answer."
####################MINIMUM####################
@minimum = @numbers.min

@sum = "Replace this string with your answer."
####################MAXIMUM####################
@maximum = @numbers.max

@mean = "Replace this string with your answer."
####################RANGE####################
@range = @numbers.max - @numbers.min

@variance = "Replace this string with your answer."
###################MEDIAN####################
if(@count % 2 == 0)
@median = (@sorted_numbers[(@count/2).to_i - 1] + @sorted_numbers[(@count/2).to_i])/2.0
else
@median = @sorted_numbers[(@count/2).to_i]
end

@standard_deviation = "Replace this string with your answer."
###################SUM####################
@sum = @numbers.sum

###################MEAN####################
@mean = @sum/@count

###################VARIANCE####################
@calculation = []

@numbers.each do |num|
difference = num - @mean
@calculation.push(difference * difference)
end

@variance = (@calculation.sum) / (@count)

###################STANDARD DEVIATION####################
@standard_deviation = @variance ** (1.0/2.0)

###################MODE####################
counter = Hash.new(0)

@sorted_numbers.each do |num|
counter[num] += 1
# p counter
end

highest_mode = counter.max_by{|key,value| value}[1] #counter.sort_by{|key,value| value}[-1]
values = counter.select{|key,value| value==highest_mode}

@mode = values

#values.select{|k,v| v == hash.values.max}
#counter.invert["key"=>highest_mode]

@mode = "Replace this string with your answer."

# ================================================================================
# Your code goes above.
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