# Python - Machine Learning Class in NCU
###### tags: `Python` `ML`
* WiFi Account

WIFI:ERP01
PW: ncuerp01

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**李明昌 博士**

網站: [https://rwepa.blogspot.com/](https://rwepa.blogspot.com/)

E-mail: [e-mail]

課程 Example Code: (有時效性)
https://pse.is/4h2k4b

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* 工具：
Anaconda with spyder
https://www.spyder-ide.org/
* 相關網站：
1. Anaconda https://www.anaconda.com/distribution/
2. scikit-learn https://scikit-learn.org/stable/index.html

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**Day 1 review:**

各位學員好, 謝謝各位的參與, 參考以下今日課程回顧:

1. 資料分析10字箴言:

> 群組,時間,建立評估變數

2. 善用 pandas 模組:

> 參考線上PDF-第5章 https://github.com/rwepa/DataDemo/blob/master/Python_Programming_Lee.pdf
>
> 熟悉 OnlineRetail.csv 資料匯入與操作
>
> 讀取 CSV 檔案 : pd.read_csv
> 讀取 Excel 檔案 : pd.read_excel
> 資料物件 : type
> 資料描述 : df.describe
> 資料訊息 : df.info
> 字串轉換為日期時間 : pd.to_datetime
> 欄位資料套用到函數 : df['欄位名稱'].map()
> 群組 : groupby
> 欄位名稱更名 : rename
> 排序 : sort_values
> 不重複值 : unique
> 合位2個資料框 : merge

3. 關聯規則:

> mlxtend 模組

4. 載入主成分分析模組:

> from sklearn.decomposition import PCA

5. 資料標準化(x-μ)/σ:

> from sklearn.preprocessing import StandardScaler

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取自: https://scikit-learn.org/stable/tutorial/machine_learning_map/index.html

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matplotlib             3.6.0               
mlxtend                0.21.0     
numpy                  1.23.3
pandas                 1.5.0
plotly                 5.10.0
scikit-learn           1.1.2

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Tensorflow library import error in Python

2022-10-01 12:05:11.623351: I tensorflow/core/platform/cpu_feature_guard.cc:193] This TensorFlow binary is optimized with oneAPI Deep Neural Network Library (oneDNN) to use the following CPU instructions in performance-critical operations:  AVX2 FMA
To enable them in other operations, rebuild TensorFlow with the appropriate compiler flags.
2022-10-01 12:05:11.792881: W tensorflow/stream_executor/platform/default/dso_loader.cc:64] Could not load dynamic library 'libcudart.so.11.0'; dlerror: libcudart.so.11.0: cannot open shared object file: No such file or directory
2022-10-01 12:05:11.792929: I tensorflow/stream_executor/cuda/cudart_stub.cc:29] Ignore above cudart dlerror if you do not have a GPU set up on your machine.
2022-10-01 12:05:11.828712: E tensorflow/stream_executor/cuda/cuda_blas.cc:2981] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
2022-10-01 12:05:12.686645: W tensorflow/stream_executor/platform/default/dso_loader.cc:64] Could not load dynamic library 'libnvinfer.so.7'; dlerror: libnvinfer.so.7: cannot open shared object file: No such file or directory
2022-10-01 12:05:12.686737: W tensorflow/stream_executor/platform/default/dso_loader.cc:64] Could not load dynamic library 'libnvinfer_plugin.so.7'; dlerror: libnvinfer_plugin.so.7: cannot open shared object file: No such file or directory
2022-10-01 12:05:12.686751: W tensorflow/compiler/tf2tensorrt/utils/py_utils.cc:38] TF-TRT Warning: Cannot dlopen some TensorRT libraries. If you would like to use Nvidia GPU with TensorRT, please make sure the missing libraries mentioned above are installed properly.

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