Stanford cs224n 第三课： GloVe 代码解读

Makefile

　　Makefile是linux中特有的一种文件， 方便自动化编译。 GloVe的源码是用C语言编写的， 在linux的环境当中需要编写一个Makefile文件来编译。关于Makefile文件的介绍可移步Linux Makefile与make命令详细介绍。下面只解读程序当中用到的知识点。执行make的时候会生成 .o 文件， 之后会链接 link, 我也不是很懂  : ( 。

　　

CC = gcc                    # 声明一个变量CC来表示 gcc
#For older gcc, use -O3 or -O2 instead of -Ofast
CFLAGS = -lm -pthread -Ofast -march=native -funroll-loops -Wno-unused-result
BUILDDIR := build           # 这里的 "=" 前面为什么会有一个 “:"， 没有理解。 猜测和”=“的功能是一样的
SRCDIR := src

all: dir glove shuffle cooccur vocab_count  # 第一个目标， 其后面所有的依赖项会执行

dir :
    mkdir -p $(BUILDDIR)     # 生成build文件夹， ”$"符号解析括号中变量的内容，也就是build
glove : $(SRCDIR)/glove.c
    $(CC) $(SRCDIR)/glove.c -o $(BUILDDIR)/glove $(CFLAGS)  # $(CC) = gcc
shuffle : $(SRCDIR)/shuffle.c
    $(CC) $(SRCDIR)/shuffle.c -o $(BUILDDIR)/shuffle $(CFLAGS)
cooccur : $(SRCDIR)/cooccur.c
    $(CC) $(SRCDIR)/cooccur.c -o $(BUILDDIR)/cooccur $(CFLAGS)
vocab_count : $(SRCDIR)/vocab_count.c
    $(CC) $(SRCDIR)/vocab_count.c -o $(BUILDDIR)/vocab_count $(CFLAGS)

clean:
rm -rf glove shuffle cooccur vocab_count build

#!/bin/bash
set -e        # 设置环境， 发生错误就退出

# Makes programs, downloads sample data, trains a GloVe model, and then evaluates it.
# One optional argument can specify the language used for eval script: matlab, octave or [default] python

make          # 编译Makefile中的内容
if [ ! -e text8 ]; then        # 检查文件 text8 是否存在
  if hash wget 2>/dev/null; then       # 这行代码没有理解到， 求大佬指点
    wget http://mattmahoney.net/dc/text8.zip
  else
    curl -O http://mattmahoney.net/dc/text8.zip
  fi
  unzip text8.zip
  rm text8.zip
fi

CORPUS=text8
VOCAB_FILE=vocab.txt
COOCCURRENCE_FILE=cooccurrence.bin
COOCCURRENCE_SHUF_FILE=cooccurrence.shuf.bin
BUILDDIR=build
SAVE_FILE=vectors
VERBOSE=2
MEMORY=4.0
VOCAB_MIN_COUNT=5
VECTOR_SIZE=50
MAX_ITER=15
WINDOW_SIZE=15
BINARY=2
NUM_THREADS=8
X_MAX=10

echo "$ $BUILDDIR/vocab_count -min-count $VOCAB_MIN_COUNT -verbose $VERBOSE < $CORPUS > $VOCAB_FILE"
$BUILDDIR/vocab_count -min-count $VOCAB_MIN_COUNT -verbose $VERBOSE < $CORPUS > $VOCAB_FILE       # 这行代码该怎么理解
echo "$ $BUILDDIR/cooccur -memory $MEMORY -vocab-file $VOCAB_FILE -verbose $VERBOSE -window-size $WINDOW_SIZE < $CORPUS > $COOCCURRENCE_FILE"
$BUILDDIR/cooccur -memory $MEMORY -vocab-file $VOCAB_FILE -verbose $VERBOSE -window-size $WINDOW_SIZE < $CORPUS > $COOCCURRENCE_FILE
echo "$ $BUILDDIR/shuffle -memory $MEMORY -verbose $VERBOSE < $COOCCURRENCE_FILE > $COOCCURRENCE_SHUF_FILE"
$BUILDDIR/shuffle -memory $MEMORY -verbose $VERBOSE < $COOCCURRENCE_FILE > $COOCCURRENCE_SHUF_FILE
echo "$ $BUILDDIR/glove -save-file $SAVE_FILE -threads $NUM_THREADS -input-file $COOCCURRENCE_SHUF_FILE -x-max $X_MAX -iter $MAX_ITER -vector-size $VECTOR_SIZE -binary $BINARY -vocab-file $VOCAB_FILE -verbose $VERBOSE"
$BUILDDIR/glove -save-file $SAVE_FILE -threads $NUM_THREADS -input-file $COOCCURRENCE_SHUF_FILE -x-max $X_MAX -iter $MAX_ITER -vector-size $VECTOR_SIZE -binary $BINARY -vocab-file $VOCAB_FILE -verbose $VERBOSE
if [ "$CORPUS" = 'text8' ]; then
   if [ "$1" = 'matlab' ]; then
       matlab -nodisplay -nodesktop -nojvm -nosplash < ./eval/matlab/read_and_evaluate.m 1>&2 
   elif [ "$1" = 'octave' ]; then
       octave < ./eval/octave/read_and_evaluate_octave.m 1>&2
   else
       echo "$ python eval/python/evaluate.py"
       python eval/python/evaluate.py
   fi
fi