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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 JSON
using SpecialFunctions
"""
gen( x, filepath )
Generate fixture data and write to file.
# Arguments
* `x`: domain
* `filepath::AbstractString`: filepath of the output file
# Examples
``` julia
julia> x = range( -1000, stop = 1000, length = 2001 );
julia> gen( x, \"./data.json\" );
```
"""
function gen( x, filepath )
y = Array{Float64}( undef, length(x) );
for i in eachindex(x)
y[i] = erfc( x[i] );
end
data = Dict([
("x", x),
("expected", y)
]);
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 );
# Subnormal values:
x = range( 1e-309, stop = 1e-324, length = 500 );
out = joinpath( dir, "subnormal.json" );
gen( x, out );
# Negative tiny values:
x = range( -1e-300, stop = -1e-308, length = 500 );
out = joinpath( dir, "tiny_negative.json" );
gen( x, out );
# Positive tiny values:
x = range( 1e-300, stop = 1e-308, length = 500 );
out = joinpath( dir, "tiny_positive.json" );
gen( x, out );
# Small(er) values:
x = range( -0.8, stop = 0.8, length = 500 );
out = joinpath( dir, "smaller.json" );
gen( x, out );
# Negative small values:
x = range( -0.8, stop = -1.0, length = 500 );
out = joinpath( dir, "small_negative.json" );
gen( x, out );
# Positive small values:
x = range( 0.8, stop = 1.0, length = 500 );
out = joinpath( dir, "small_positive.json" );
gen( x, out );
# Negative medium values:
x = range( -1.0, stop = -3.0, length = 500 );
out = joinpath( dir, "medium_negative.json" );
gen( x, out );
# Positive medium values:
x = range( 1.0, stop = 3.0, length = 500 );
out = joinpath( dir, "medium_positive.json" );
gen( x, out );
# Large negative values:
x = range( -2.5, stop = -28.0, length = 500 );
out = joinpath( dir, "large_negative.json" );
gen( x, out );
# Large positive values:
x = range( 2.5, stop = 28.0, length = 500 );
out = joinpath( dir, "large_positive.json" );
gen( x, out );
# Larger negative values:
x = range( -5.0, stop = -100.0, length = 500 );
out = joinpath( dir, "larger_negative.json" );
gen( x, out );
# Larger positive values:
x = range( 5.0, stop = 100.0, length = 500 );
out = joinpath( dir, "larger_positive.json" );
gen( x, out );
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