awk -F, '{OFS="\t";print $3,$4}' mo_orders_weekly_2019-04-27.txt ==> awk '{print $4","$5}' mo_orders_weekly_2019-04-27.txt
cat mo_orders_weekly_2019-04-27.txt | cut -d ',' -f3 ==> cat mo_orders_weekly_2019-04-27.txt | cut -f3-4
awk -F, '{OFS=",";print $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$20,$21}' infile.csv > outfile.csv
something else to consider …
linux tree display: use LC_ALL=C tree to display the directory structure in tree format. By default tree may give weired strings. Need LC_ALL=C to change to default language.
RHEL 6 - how to install 'GLIBC_2.14' or 'GLIBC_2.15'?: when install lightgbm in RHEL 6, it asks for intall GLIBC_2.14 to execute the software is built in RHEL 7 and try to run on RHEL 6.
从信用卡欺诈模型看不平衡数据分类：这个作者总结了kaggle上面不同的人使用不同的抽样办法，不同的模型，以及异常值检验的办法。我以前也做过这 …
convert dataframe other types: df.dtypes, df.astype(str), df.astype(float), df.astype('category'), df.astype('object')
ValueError: If using all scalar values, you must pass an index
df = pd.DataFrame({'A': [1], 'B': [2]}) or df = pd.DataFrame({'A': 1, 'B': 2}, index=[0])
Convolutional Neural Networks (Course 4 of the Deep Learning Specialization)
ubuntu screenshots and screencasts
Prt Scrn to take a screenshot of the desktop.
Alt+Prt Scrn to take a screenshot of a window.
Shift+Prt Scrn to take a screenshot of an area you select.
