feedforward
commit
b3fc3c59f1
|
|
@ -0,0 +1,3 @@
|
|||
/target
|
||||
*swp
|
||||
*gz
|
||||
|
|
@ -0,0 +1,364 @@
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|||
# This file is automatically @generated by Cargo.
|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
||||
"crossbeam-utils",
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||||
"lazy_static",
|
||||
"memoffset",
|
||||
"scopeguard",
|
||||
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|
||||
|
||||
[[package]]
|
||||
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||||
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||||
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||||
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|
||||
"cfg-if",
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||||
"lazy_static",
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||||
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||||
|
||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
"atty",
|
||||
"humantime",
|
||||
"log",
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||||
"regex",
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||||
"termcolor",
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||||
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||||
|
||||
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||||
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||||
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name = "log"
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||||
"cfg-if",
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||||
]
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||||
dependencies = [
|
||||
"autocfg",
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||||
]
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||||
|
||||
[[package]]
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||||
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||||
"adler",
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||||
"autocfg",
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||||
]
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||||
|
||||
[[package]]
|
||||
name = "neural"
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||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"byteorder",
|
||||
"env_logger",
|
||||
"flate2",
|
||||
"log",
|
||||
"rand",
|
||||
"rayon",
|
||||
]
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||||
|
||||
[[package]]
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||||
"hermit-abi",
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||||
"libc",
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||||
]
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||||
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||||
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name = "ppv-lite86"
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[[package]]
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||||
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"libc",
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||||
"rand_chacha",
|
||||
"rand_core",
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||||
"rand_hc",
|
||||
]
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||||
|
||||
[[package]]
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||||
name = "rand_chacha"
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version = "0.3.0"
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"ppv-lite86",
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||||
"rand_core",
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||||
]
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||||
|
||||
[[package]]
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||||
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||||
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|
||||
"getrandom",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rand_hc"
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||||
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source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
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||||
"rand_core",
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]
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[[package]]
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||||
dependencies = [
|
||||
"autocfg",
|
||||
"crossbeam-deque",
|
||||
"either",
|
||||
"rayon-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rayon-core"
|
||||
version = "1.9.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9ab346ac5921dc62ffa9f89b7a773907511cdfa5490c572ae9be1be33e8afa4a"
|
||||
dependencies = [
|
||||
"crossbeam-channel",
|
||||
"crossbeam-deque",
|
||||
"crossbeam-utils",
|
||||
"lazy_static",
|
||||
"num_cpus",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "regex"
|
||||
version = "1.4.5"
|
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "957056ecddbeba1b26965114e191d2e8589ce74db242b6ea25fc4062427a5c19"
|
||||
dependencies = [
|
||||
"aho-corasick",
|
||||
"memchr",
|
||||
"regex-syntax",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "regex-syntax"
|
||||
version = "0.6.23"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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checksum = "24d5f089152e60f62d28b835fbff2cd2e8dc0baf1ac13343bef92ab7eed84548"
|
||||
|
||||
[[package]]
|
||||
name = "scopeguard"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
|
||||
|
||||
[[package]]
|
||||
name = "termcolor"
|
||||
version = "1.1.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
|
||||
dependencies = [
|
||||
"winapi-util",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.10.2+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-util"
|
||||
version = "0.1.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
|
||||
dependencies = [
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
[package]
|
||||
name = "neural"
|
||||
version = "0.1.0"
|
||||
authors = ["Serge Bazanski <q3k@q3k.org>"]
|
||||
edition = "2018"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
byteorder = "1"
|
||||
flate2 = "1"
|
||||
log = "0.4.0"
|
||||
env_logger = "0.8.3"
|
||||
rand = "0.8.3"
|
||||
rayon = "1"
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
with import <nixpkgs> {};
|
||||
|
||||
pkgs.mkShell {
|
||||
buildInputs = with pkgs; [ rustup ];
|
||||
}
|
||||
|
|
@ -0,0 +1,83 @@
|
|||
use std::time;
|
||||
use rand::Rng;
|
||||
use rayon::prelude::*;
|
||||
|
||||
mod mnist;
|
||||
|
||||
struct Network {
|
||||
sizes: Vec<usize>,
|
||||
biases: Vec<Vec<f32>>,
|
||||
weights: Vec<Vec<Vec<f32>>>,
|
||||
}
|
||||
|
||||
impl Network {
|
||||
fn new(sizes: &Vec<usize>) -> Self {
|
||||
let mut rng = rand::thread_rng();
|
||||
|
||||
let biases = sizes[1..].iter().map(|s| {
|
||||
(0..s.clone()).map(|_| rng.gen::<f32>()).collect()
|
||||
}).collect();
|
||||
|
||||
let weights = sizes.iter().zip(sizes[1..].iter()).map(|(from, to)| {
|
||||
(0..to.clone()).map(|_| {
|
||||
(0..from.clone()).map(|_| rng.gen::<f32>()).collect()
|
||||
}).collect()
|
||||
}).collect();
|
||||
|
||||
Self {
|
||||
sizes: sizes.clone(),
|
||||
biases, weights,
|
||||
}
|
||||
}
|
||||
|
||||
fn feedforward(&self, a: &Vec<f32>) -> Vec<f32> {
|
||||
let res: Option<Vec<f32>> = None;
|
||||
self.biases.iter()
|
||||
.zip(self.weights.iter())
|
||||
.fold(a.clone(), |a, (biases, weights)| {
|
||||
mat_vec_mult(weights, &a).iter()
|
||||
.zip(biases.iter())
|
||||
.map(|(aa, b)| {
|
||||
sigmoid(aa+b)
|
||||
}).collect()
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
fn sigmoid(z: f32) -> f32 {
|
||||
1. / (1. + (-z).exp())
|
||||
}
|
||||
|
||||
fn mat_vec_mult(m: &Vec<Vec<f32>>, v: &Vec<f32>) -> Vec<f32> {
|
||||
m.iter().enumerate().map(|(i, row)| {
|
||||
if row.len() != v.len() {
|
||||
panic!("Mismatch: V {}, M {}x{}", v.len(), m.len(), row.len());
|
||||
}
|
||||
row.iter().zip(v.iter()).map(|(rr, vv)| rr * vv).sum()
|
||||
}).collect()
|
||||
}
|
||||
|
||||
fn main() {
|
||||
env_logger::init();
|
||||
|
||||
let now = time::Instant::now();
|
||||
let set = mnist::Set::load("train").unwrap();
|
||||
let elapsed = now.elapsed();
|
||||
log::info!("Loaded {} images in {:?}.", set.images.images.len(), elapsed);
|
||||
|
||||
let now = time::Instant::now();
|
||||
let size = vec![
|
||||
28*28 as usize,
|
||||
15usize,
|
||||
10usize,
|
||||
];
|
||||
let network = Network::new(&size);
|
||||
let elapsed = now.elapsed();
|
||||
log::info!("Created random network {:?} in {:?}.", size, elapsed);
|
||||
|
||||
let now = time::Instant::now();
|
||||
let image: Vec<f32> = (&set.images.images[0]).into();
|
||||
let res = network.feedforward(&image);
|
||||
let elapsed = now.elapsed();
|
||||
log::info!("feedforward: {:?} in {:?}", res, elapsed);
|
||||
}
|
||||
|
|
@ -0,0 +1,113 @@
|
|||
use std::{io, fs};
|
||||
use byteorder::{
|
||||
BigEndian,
|
||||
ReadBytesExt,
|
||||
};
|
||||
use flate2::read::GzDecoder;
|
||||
|
||||
#[derive(Debug)]
|
||||
pub enum Error {
|
||||
IO(io::Error),
|
||||
InvalidMagic,
|
||||
Parse(String),
|
||||
}
|
||||
|
||||
impl From<io::Error> for Error {
|
||||
fn from(err: io::Error) -> Self {
|
||||
Error::IO(err)
|
||||
}
|
||||
}
|
||||
|
||||
pub type Result<T> = std::result::Result<T, Error>;
|
||||
|
||||
pub struct Image {
|
||||
pixels: Vec<u8>,
|
||||
width: usize,
|
||||
height: usize,
|
||||
}
|
||||
|
||||
impl Image {
|
||||
pub fn parse(
|
||||
rdr: &mut impl io::Read,
|
||||
width: usize,
|
||||
height: usize,
|
||||
) -> Result<Self> {
|
||||
let npixels: usize = width * height;
|
||||
let mut pixels: Vec<u8> = vec![0u8; npixels];
|
||||
rdr.read(&mut pixels)?;
|
||||
Ok(Image {
|
||||
pixels, width, height,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
impl Into<Vec<f32>> for &Image {
|
||||
fn into(self) -> Vec<f32> {
|
||||
self.pixels.iter().map(|px| {
|
||||
(*px as f32) / 255.0
|
||||
}).collect()
|
||||
}
|
||||
}
|
||||
|
||||
pub struct ImageFile {
|
||||
pub images: Vec<Image>,
|
||||
}
|
||||
|
||||
impl ImageFile {
|
||||
pub fn parse(mut rdr: impl io::Read) -> Result<Self> {
|
||||
let magic = rdr.read_u32::<BigEndian>()?;
|
||||
if magic != 2051 {
|
||||
return Err(Error::InvalidMagic);
|
||||
}
|
||||
let num_images = rdr.read_u32::<BigEndian>()?;
|
||||
let num_rows = rdr.read_u32::<BigEndian>()?;
|
||||
let num_columns = rdr.read_u32::<BigEndian>()?;
|
||||
|
||||
let mut images: Vec<Image> = Vec::with_capacity(num_images as usize);
|
||||
for _ in 0..num_images {
|
||||
let image = Image::parse(&mut rdr, num_rows as usize, num_columns as usize)?;
|
||||
images.push(image);
|
||||
}
|
||||
Ok(ImageFile {
|
||||
images,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
pub struct LabelFile {
|
||||
magic: u32,
|
||||
num_labels: u32,
|
||||
labels: Vec<u8>,
|
||||
}
|
||||
|
||||
impl LabelFile {
|
||||
pub fn parse(mut rdr: impl io::Read) -> Result<Self> {
|
||||
let magic = rdr.read_u32::<BigEndian>()?;
|
||||
if magic != 2049 {
|
||||
return Err(Error::InvalidMagic);
|
||||
}
|
||||
let num_labels = rdr.read_u32::<BigEndian>()?;
|
||||
let mut labels: Vec<u8> = vec![0u8; num_labels as usize];
|
||||
rdr.read(&mut labels)?;
|
||||
Ok(LabelFile {
|
||||
magic, num_labels, labels,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Set {
|
||||
pub images: ImageFile,
|
||||
labels: LabelFile,
|
||||
}
|
||||
|
||||
impl Set {
|
||||
pub fn load(name: &str) -> Result<Self> {
|
||||
let labels_gz = fs::File::open(format!("{}-labels-idx1-ubyte.gz", name))?;
|
||||
let labels = LabelFile::parse(GzDecoder::new(labels_gz))?;
|
||||
let images_gz = fs::File::open(format!("{}-images-idx3-ubyte.gz", name))?;
|
||||
let images = ImageFile::parse(GzDecoder::new(images_gz))?;
|
||||
Ok(Set {
|
||||
images, labels,
|
||||
})
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue