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#!/usr/bin/env julia
#
# @license Apache-2.0
#
# Copyright (c) 2018 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import Distributions: logcdf, DiscreteUniform
import JSON
"""
gen( x, a, b, name )
Generate fixture data and write to file.
# Arguments
* `x`: input value
* `a`: minimum support
* `b`: maximum support
* `name::AbstractString`: output filename
# Examples
``` julia
julia> x = rand( 1000 ) .* 5.0;
julia> a = round.( Int64, rand( 1000 ) .* 10 );
julia> b = round.( Int64, a .+ ( rand( 1000 ) .* 10.0 ) );
julia> gen( x, a, b, "data.json" );
```
"""
function gen( x, a, b, name )
z = Array{Float64}( undef, length(x) );
for i in eachindex(x)
z[ i ] = logcdf( DiscreteUniform( a[i], b[i] ), x[i] );
end
# Store data to be written to file as a collection:
data = Dict([
("x", x),
("a", a),
("b", b),
("expected", z)
]);
# Based on the script directory, create an output filepath:
filepath = joinpath( dir, name );
# Write the data to the output filepath as JSON:
outfile = open( filepath, "w" );
write( outfile, JSON.json(data) );
close( outfile );
end
# Get the filename:
file = @__FILE__;
# Extract the directory in which this file resides:
dir = dirname( file );
# Small Range:
a = round.( Int64, rand( 1000 ) .* 20.0 );
b = round.( Int64, ( rand( 1000 ) .* 20.0 ) .+ a );
x = a .+ ( rand( 1000 ) .* ( b-a ) );
gen( x, a, b, "small_range.json" );
# Medium Range:
a = round.( Int64, rand( 1000 ) .* 20.0 );
b = round.( Int64, ( rand( 1000 ) .* 40.0 ) .+ a );
x = a .+ ( rand( 1000 ) .* ( b-a ) );
gen( x, a, b, "medium_range.json" );
# Large Range:
a = round.( Int64, rand( 1000 ) .* 20.0 );
b = round.( Int64, ( rand( 1000 ) .* 80.0 ) .+ a );
x = a .+ ( rand( 1000 ) .* ( b-a ) );
gen( x, a, b, "large_range.json" );
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