add chapter 5
This commit is contained in:
Bogumił Kamiński
parent
ac449c8132
commit
2ca7eb6737
@ -3,6 +3,12 @@
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@ -78,6 +101,11 @@ git-tree-sha1 = "417b0ed7b8b838aa6ca0a87aadf1bb9eb111ce40"
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@ -94,6 +122,12 @@ git-tree-sha1 = "9f02045d934dc030edad45944ea80dbd1f0ebea7"
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@ -104,6 +138,12 @@ git-tree-sha1 = "cc70b17275652eb47bc9e5f81635981f13cea5c8"
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@ -135,6 +175,12 @@ git-tree-sha1 = "80c3e8639e3353e5d2912fb3a1916b8455e2494b"
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@ -215,6 +261,12 @@ git-tree-sha1 = "87eb71354d8ec1a96d4a7636bd57a7347dde3ef9"
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@ -290,6 +342,12 @@ git-tree-sha1 = "129acf094d168394e80ee1dc4bc06ec835e510a3"
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@ -344,6 +402,12 @@ git-tree-sha1 = "8076680b162ada2a031f707ac7b4953e30667a37"
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@ -752,6 +834,12 @@ git-tree-sha1 = "2ce41e0d042c60ecd131e9fb7154a3bfadbf50d3"
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@ -760,6 +848,12 @@ uuid = "4607b0f0-06f3-5cda-b6b1-a6196a1729e9"
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deps = ["Dates"]
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uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
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@ -2,7 +2,13 @@
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BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
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CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
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DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
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FreqTables = "da1fdf0e-e0ff-5433-a45f-9bb5ff651cb1"
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GLM = "38e38edf-8417-5370-95a0-9cbb8c7f171a"
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HTTP = "cd3eb016-35fb-5094-929b-558a96fad6f3"
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Impute = "f7bf1975-0170-51b9-8c5f-a992d46b9575"
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InlineStrings = "842dd82b-1e85-43dc-bf29-5d0ee9dffc48"
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JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
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Missings = "e1d29d7a-bbdc-5cf2-9ac0-f12de2c33e28"
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Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
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PooledArrays = "2dfb63ee-cc39-5dd5-95bd-886bf059d720"
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StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
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214
ch05.jl
Normal file
214
ch05.jl
Normal file
@ -0,0 +1,214 @@
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# Bogumił Kamiński, 2022
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# Codes for chapter 5
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# Code for listing 5.1
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using HTTP
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using JSON3
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query = "https://api.nbp.pl/api/exchangerates/rates/a/usd/" *
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"2020-06-01/?format=json" #A
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response = HTTP.get(query) #B
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json = JSON3.read(response.body) #C
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# Code for the remainder of section 5.1.2
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response.body
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String(response.body)
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response.body
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json.table
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json.currency
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json.code
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json.rates
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json.rates[1].mid
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only(json.rates).mid
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only([])
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only([1, 2])
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# Code for listing 5.2
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query = "https://api.nbp.pl/api/exchangerates/rates/a/usd/" *
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"2020-06-06/?format=json"
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response = HTTP.get(query)
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# Code for listing 5.3
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query = "https://api.nbp.pl/api/exchangerates/rates/a/usd/" *
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"2020-06-01/?format=json"
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try
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response = HTTP.get(query)
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json = JSON3.read(response.body)
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only(json.rates).mid
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catch e
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if e isa HTTP.ExceptionRequest.StatusError
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missing
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else
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rethrow(e)
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end
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end
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query = "https://api.nbp.pl/api/exchangerates/rates/a/usd/" *
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"2020-06-06/?format=json"
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try
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response = HTTP.get(query)
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json = JSON3.read(response.body)
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only(json.rates).mid
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catch e
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if e isa HTTP.ExceptionRequest.StatusError
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missing
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else
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rethrow(e)
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end
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end
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# Code for section 5.2
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ismissing(missing)
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ismissing(1)
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1 + missing
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sin(missing)
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1 == missing
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1 > missing
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1 < missing
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if missing
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print("this is not printed")
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end
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missing && true
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coalesce(missing, true)
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coalesce(missing, false)
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isequal(1, missing)
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isequal(missing, missing)
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isless(1, missing)
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isless(missing, missing)
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isless(Inf, missing)
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a = [1]
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b = [1]
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isequal(a, b)
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a === b
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x = [1, missing, 3, 4, missing]
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coalesce.(x, 0)
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sum(x)
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y = skipmissing(x)
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sum(y)
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sum(skipmissing(x))
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fun(x::Int, y::Int) = x + y
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fun(1, 2)
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fun(1, missing)
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using Missings
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fun2 = passmissing(fun)
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fun2(1, 2)
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fun2(1, missing)
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# Code for section 5.3
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using Dates
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d = Date("2020-06-01")
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typeof(d)
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year(d)
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month(d)
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day(d)
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dayofweek(d)
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dayname(d)
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Date(2020, 6, 1)
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dates = Date.(2020, 6, 1:30)
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Day(1)
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d
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d + Day(1)
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Date(2020, 5, 20):Day(1):Date(2020, 7, 5)
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collect(Date(2020, 5, 20):Day(1):Date(2020, 7, 5))
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# Code for listing 5.6
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function get_rate(date::Date)
|
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query = "https://api.nbp.pl/api/exchangerates/rates/" *
|
||||
"a/usd/$date/?format=json"
|
||||
try
|
||||
response = HTTP.get(query)
|
||||
json = JSON3.read(response.body)
|
||||
return only(json.rates).mid
|
||||
catch e
|
||||
if e isa HTTP.ExceptionRequest.StatusError
|
||||
return missing
|
||||
else
|
||||
rethrow(e)
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
# Code for showing how string interpolation works
|
||||
|
||||
"https://api.nbp.pl/api/exchangerates/rates/" *
|
||||
"a/usd/$(dates[1])/?format=json"
|
||||
|
||||
"https://api.nbp.pl/api/exchangerates/rates/" *
|
||||
"a/usd/$dates[1]/?format=json"
|
||||
|
||||
# Code for listing 5.7
|
||||
|
||||
rates = get_rate.(dates)
|
||||
|
||||
# Code for section 5.4
|
||||
|
||||
using Statistics
|
||||
mean(rates)
|
||||
std(rates)
|
||||
|
||||
mean(skipmissing(rates))
|
||||
std(skipmissing(rates))
|
||||
|
||||
# Code for listing 5.8
|
||||
|
||||
using FreqTables
|
||||
proptable(dayname.(dates), ismissing.(rates), margins=1)
|
||||
|
||||
# Code showing how to specify a complex condition using broadcasting
|
||||
|
||||
dayname.(dates) .== "Thursday" .&& ismissing.(rates)
|
||||
|
||||
# Code for listing 5.9
|
||||
|
||||
dates[dayname.(dates) .== "Thursday" .&& ismissing.(rates)]
|
||||
|
||||
# Codes for plotting exchange rate data
|
||||
|
||||
using Plots
|
||||
plot(dates, rates, xlabel="day", ylabel="PLN/USD", legend=false)
|
||||
|
||||
rates_ok = .!ismissing.(rates)
|
||||
|
||||
plot(dates[rates_ok], rates[rates_ok],
|
||||
xlabel="day", ylabel="PLN/USD", legend=false)
|
||||
|
||||
using Impute
|
||||
rates_filled = Impute.interp(rates)
|
||||
|
||||
scatter!(dates, rates_filled)
|
||||
Loading…
Reference in New Issue
Block a user