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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, TDist
import JSON
"""
gen( x, v, name )
Generate fixture data and write to file.
# Arguments
* `x`: input value
* `v`: degrees of freedom
* `name::AbstractString`: output filename
# Examples
``` julia
julia> x = range( -20, stop = 20, length = 1001 );
julia> v = range( 1, stop = 10, length = 1001 );
julia> gen( x, v, \"data.json\" );
```
"""
function gen( x, v, name )
z = Array{Float64}( undef, length(x) );
for i in eachindex(x)
z[ i ] = logcdf( TDist( v[i] ), x[i] );
end
# Store data to be written to file as a collection:
data = Dict([
("x", x),
("v", v),
("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 );
# Random (x small, v small):
x = ( rand( 1001 ) .* 2.0 ) .- 1.0;
v = rand( 1001 ) .* 2.0;
gen( x, v, "small_small.json" );
# Random (x large, v small):
x = ( rand( 1001 ) .* 20.0 ) .- 10.0;
v = rand( 1001 ) .* 2.0;
gen( x, v, "large_small.json" );
# Random (x small, v large):
x = ( rand( 1001 ) .* 2.0 ) .- 1.0;
v = rand( 1001 ) .* 20.0;
gen( x, v, "small_large.json" );
# Random (x large, v large):
x = ( rand( 1001 ) .* 20.0 ) .- 10.0;
v = rand( 1001 ) .* 20.0;
gen( x, v, "large_large.json" );
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