基於jupyter lab搭建網頁程式設計環境並新增自定義python kernel和matlab kernel以及plotly的使用
阿新 • • 發佈:2021-01-06
> 內容轉載自[我的部落格](https://blog.whuzfb.cn/blog/2020/08/02/install_jupyter_lab/)
[TOC]
## 說明
即使該系統有使用者`zfb`、`root`、`test`、`ubuntu`等,下面介紹的步驟隻影響本使用者,既不需要`root`許可權,也不會對其他使用者造成影響(開機自啟的`service`檔案需要`root`使用者編輯和設定開機自啟,之後就不需要操作了)
## 1. 建立虛擬環境jupyter
```bash
# 安裝venv
sudo apt-get install python3-venv
# 建立虛擬環境,名稱為jupyter
python3 -m venv jupyter
```
## 2. 安裝nodejs(用於jupyterlab安裝擴充套件)
```bash
# 下載nvm用於管理npm、nodejs環境
wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash
# 重新啟動即可使用nvm命令
# nvm ls-remote 列出nodejs所有可用版本
# nvm install 10.10.0 安裝nodejs 10.10.0版本
# 安裝nodejs最新版本
nvm install node
```
把nvm環境`bin`資料夾放入`PATH`,即在`~/.bashrc`新增一行內容,必須把自己路徑放在前面,避免先搜尋到`/usr/local/bin`目錄:
```bash
export PATH=/home/zfb/.nvm/versions/node/v14.5.0/bin:${PATH}
```
## 3. 安裝pip包
```bash
# 啟用虛擬環境jupyter
source jupyter/bin/activate
# 在虛擬環境jupyter中安裝jupyterlab和nodejs
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple jupyterlab npm nodejs
```
## 4. 使用jupyterlab
先把python虛擬環境`jupyter`的`bin`資料夾放入`PATH`,即在`~/.bashrc`新增一行內容,必須把自己路徑放在前面,避免先搜尋到`/usr/local/bin`目錄:
```bash
export PATH=/home/zfb/jupyter/bin:${PATH}
```
在命令列輸入`jupyter lab`即可在本地埠開啟(不需要啟用虛擬環境),可以通過命令`which jupyter`得到`/home/zfb/jupyter/bin/jupyter`結果
在jupyterlab執行期間,可以通過命令`jupyter notebook list`檢視當前執行的jupyter例項
列出當前已安裝的擴充套件:`jupyter labextension list`
解除安裝某個擴充套件:`jupyter labextension uninstall my-extension-name`
檢視jupyter的kernel:`jupyter kernelspec list`
注意:`http://127.0.0.1:8888/lab`是jupyterlab的地址;`http://127.0.0.1:8888/tree`是傳統jupyter notebook的地址
## 5. 配置jupyterlab
在終端輸入以下命令生成加密祕鑰:
```bash
# 啟用虛擬環境jupyter
source jupyter/bin/activate
# 密碼設定為123456,此命令輸出密碼的sha1結果,用於下一步配置檔案token
python -c "from notebook.auth import passwd;print(passwd('123456'))"
```
在命令列輸入`jupyter lab --generate-config`,則會生成檔案`/home/zfb/.jupyter/jupyter_notebook_config.py`,開啟該檔案,修改以下內容:
```python
c.NotebookApp.allow_remote_access = True
c.NotebookApp.ip = '0.0.0.0'
c.NotebookApp.notebook_dir = '/home/zfb/jp_data/'
c.NotebookApp.open_browser = False
c.NotebookApp.password = 'sha1:10d130e9bad7:b73d9821f96ccc4f42b2071b5dc46f2357373da3'
c.NotebookApp.port = 8888
```
安裝擴充套件時如果找不到node,那麼需要確保它在PATH,然後手動啟動jupyter lab,**不要使用service啟動**即可在瀏覽器點選install安裝
## 6. 開機自啟jupyter
切換root使用者(zfb使用者不能執行sudo命令),建立檔案jupyter-zfb.service,內容如下:
```ini
[Unit]
Description=Auto start jupyter lab Service for web
After=network.target
[Service]
Type=simple
# Type=forking
# PIDFile=/var/pid/master.pid
# 如果是在為其他使用者配置jupyterlab,這裡填對應的使用者名稱
User=zfb
Restart=on-failure
RestartSec=10s
WorkingDirectory=/home/zfb/jupyter
ExecStart=/home/zfb/jupyter/bin/jupyter lab
# ExecReload=/home/zfb/jupyter/bin/jupyter lab
[Install]
WantedBy=multi-user.target
```
然後依次執行下面命令:
```bash
# 複製jupyter-zfb.service檔案到指定目錄
sudo cp ./jupyter-zfb.service /etc/systemd/system/
# 設定jupyter-zfb開機自啟
systemctl enable jupyter-zfb.service
# 過載service檔案
sudo systemctl daemon-reload
# 檢視所有的開機自啟項
systemctl list-unit-files --type=service|grep enabled
# 手動開啟jupyter-zfb服務
service jupyter-zfb start
# 檢視jupyter-zfb服務的執行狀態
service jupyter-zfb status
# 停止jupyter-zfb服務
service jupyter-zfb stop
```
檢視服務狀態的輸出如下:
```txt
root1@my-Server:~$ service jupyter-zfb status
● jupyter-zfb.service - Auto start jupyter lab Service for web
Loaded: loaded (/etc/systemd/system/jupyter-zfb.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2020-07-19 23:59:44 CST; 3s ago
Main PID: 19426 (jupyter-lab)
Tasks: 1 (limit: 7372)
CGroup: /system.slice/jupyter-zfb.service
└─19426 /home/zfb/jupyter/bin/python3 /home/zfb/jupyter/bin/jupyter-lab
Jul 19 23:59:44 my-Server systemd[1]: Started Auto start jupyter lab Service for web.
Jul 19 23:59:44 my-Server jupyter[19426]: [I 23:59:44.704 LabApp] JupyterLab extension loaded from /home/zfb/
Jul 19 23:59:44 my-Server jupyter[19426]: [I 23:59:44.704 LabApp] JupyterLab application directory is /home/z
Jul 19 23:59:44 my-Server jupyter[19426]: [I 23:59:44.706 LabApp] Serving notebooks from local directory: /ho
Jul 19 23:59:44 my-Server jupyter[19426]: [I 23:59:44.706 LabApp] The Jupyter Notebook is running at:
Jul 19 23:59:44 my-Server jupyter[19426]: [I 23:59:44.706 LabApp] http://my-Server:8888/
Jul 19 23:59:44 my-Server jupyter[19426]: [I 23:59:44.706 LabApp] Use Control-C to stop this server and shut
root1@my-Server:~$
```
**問題**:service執行,則一旦安裝擴充套件之後重新開啟,擴充套件處就顯示500 Internal Server Error;但是直接執行在控制檯無問題;nohup jupyter lab &也無問題;screen也無問題
## 6. 開機自啟和nohup執行
建立檔案`startjupyterlab.sh`並分配執行許可權:
```bash
#!/bin/bash
# 後臺執行,重定向錯誤日誌,匯出pid到檔案
# nohup會免疫HUP訊號,>>表示追加模式
/usr/bin/nohup /home/zfb/jupyter/bin/jupyter lab >> /home/zfb/jupyter/log/jupyterlab.log 2>&1 & echo $! > /home/zfb/jupyter/run_jupyter.pid
```
ubuntu 18.04不再使用`inited`管理系統,改用`systemd`,原本簡單方便的`/etc/rc.local`檔案已經沒有了。systemd預設讀取`/etc/systemd/system/`下的配置檔案,該目錄下的檔案會連結`/lib/systemd/system/`下的檔案,一般系統安裝完`/lib/systemd/system/`下會有`rc-local.service`檔案,即我們需要的配置檔案,裡面有寫到`rc.local`的啟動順序和行為,檔案內容如下`cat /lib/systemd/system/rc-local.service`
```ini
# SPDX-License-Identifier: LGPL-2.1+
#
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
# This unit gets pulled automatically into multi-user.target by
# systemd-rc-local-generator if /etc/rc.local is executable.
[Unit]
Description=/etc/rc.local Compatibility
Documentation=man:systemd-rc-local-generator(8)
ConditionFileIsExecutable=/etc/rc.local
After=network.target
[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
RemainAfterExit=yes
GuessMainPID=no
```
`systemctl status rc-local`可以檢視當前是否有`rc-local`這個服務,如果沒有則需要建立`ln -fs /lib/systemd/system/rc-local.service /etc/systemd/system/rc-local.service`。設定開機啟動並執行服務可以看到如下輸出:
```bash
zfb@my-Server:~$ service rc-local status
● rc-local.service - /etc/rc.local Compatibility
Loaded: loaded (/lib/systemd/system/rc-local.service; static; vendor preset: enabled)
Drop-In: /lib/systemd/system/rc-local.service.d
└─debian.conf
Active: inactive (dead)
Condition: start condition failed at Mon 2020-07-20 14:39:15 CST; 2s ago
└─ ConditionFileIsExecutable=/etc/rc.local was not met
Docs: man:systemd-rc-local-generator(8)
zfb@ny-Server:~$
```
然後執行以下操作:
```bash
# 建立檔案
sudo vim /etc/rc.local
# 新增內容
# #!/bin/bash
#
# su - zfb -c "/bin/bash /home/zfb/startjupyterlab.sh"
# 新增執行許可權
sudo chmod +x /etc/rc.local
```
執行`service rc-local start`即可啟動服務,`service rc-local status`檢視執行狀態
**日誌分割**:然後建立檔案`/etc/logrotate.d/jupyter-zfb`:
```txt
su zfb zfb
/home/zfb/jupyter/log/jupyterlab.log{
weekly
minsize 10M
rotate 10
missingok
dateext
notifempty
sharedscripts
postrotate
if [ -f /home/zfb/jupyter/run_jupyter.pid ]; then
/bin/kill -9 `cat /home/zfb/jupyter/run_jupyter.pid`
fi
/usr/bin/nohup /home/zfb/jupyter/bin/jupyter lab >> /home/zfb/jupyter/log/jupyterlab.log 2>&1 & echo $! > /home/zfb/jupyter/run_jupyter.pid
endscript
}
```
執行命令`logrotate -dvf /etc/logrotate.d/jupyter-zfb`可以檢視每次輪詢的輸出
* `d`表示只是顯示,並不實際執行
* `v`表示顯示詳細資訊
* `f`表示即使不滿足條件也強制執行一次
## 7. 新增其他python環境的kernel
在不啟用任何環境的終端,建立新的虛擬環境py36(最後把它新增到jupyter的kernel)
```bash
# 建立新的虛擬環境py36
python3 -m venv py36
# 啟用新虛擬環境py36
source py36/bin/activate
# 為新環境安裝需要的庫
# pip install -i https://pypi.tuna.tsinghua.edu.cn/simple
# 為虛擬環境安裝kernel
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple ipykernel
# 將此虛擬環境配置到jupyter的kernel中,此命令返回
# Installed kernelspec kernel_py36 in /home/zfb/.local/share/jupyter/kernels/kernel_py36
# 若不指定--user,則會提示許可權不足,因為預設安裝到/usr/local/share/jupyter
python -m ipykernel install --name kernel_py36 --user
# 啟動jupyterlab,此時可以看到已經有兩個kernel可供切換(jupyter、kernel_py36)
jupyter lab
```
刪除某個kernel:`jupyter kernelspec remove kernel_py36`
## 8. 新增matlab的kernel
啟用虛擬環境`jupyter`(jupyterlab被安裝在此虛擬環境),然後安裝matlab_kernal,再切換到matlab的安裝目錄`extern/engines/python/`,執行`setup.py`檔案,具體步驟的命令如下:
```bash
# 啟用虛擬環境jupyter
source jupyter/bin/activate
# 在虛擬環境jupyter安裝matlab_kernel
pip install matlab_kernel
# 若不指定--user,則會提示許可權不足
python -m matlab_kernel install --user
# 切換到matlab安裝目錄的extern/engines/python/,然後執行命令
python setup.py install
# --build-base="/home/zfb/build" install --prefix="/home/zfb/jupyter/lib/python3.6/site-packages"
# 此時執行jupyter kernelspec list即可看到如下輸出
# Available kernels:
# matlab /home/zfb/jupyter/share/jupyter/kernels/matlab
# python3 /home/zfb/jupyter/share/jupyter/kernels/python3
```
保證最後`/home/zfb/jupyter/lib/python3.6/site-packages/`資料夾下有`matlab`資料夾和`matlab_kernel`資料夾:
```txt
matlab
├── engine
│ ├── _arch.txt
│ ├── basefuture.py
│ ├── engineerror.py
│ ├── enginehelper.py
│ ├── enginesession.py
│ ├── fevalfuture.py
│ ├── futureresult.py
│ ├── __init__.py
│ ├── matlabengine.py
│ ├── matlabfuture.py
│ └── __pycache__
│ ├── basefuture.cpython-36.pyc
│ ├── engineerror.cpython-36.pyc
│ ├── enginehelper.cpython-36.pyc
│ ├── enginesession.cpython-36.pyc
│ ├── fevalfuture.cpython-36.pyc
│ ├── futureresult.cpython-36.pyc
│ ├── __init__.cpython-36.pyc
│ ├── matlabengine.cpython-36.pyc
│ └── matlabfuture.cpython-36.pyc
├── __init__.py
├── _internal
│ ├── __init__.py
│ ├── mlarray_sequence.py
│ ├── mlarray_utils.py
│ └── __pycache__
│ ├── __init__.cpython-36.pyc
│ ├── mlarray_sequence.cpython-36.pyc
│ └── mlarray_utils.cpython-36.pyc
├── mlarray.py
├── mlexceptions.py
└── __pycache__
├── __init__.cpython-36.pyc
├── mlarray.cpython-36.pyc
└── mlexceptions.cpython-36.pyc
5 directories, 31 files
matlab_kernel
├── check.py
├── __init__.py
├── kernel.json
├── kernel.py
├── __main__.py
├── matlab
│ ├── engine
│ │ ├── _arch.txt
│ │ ├── basefuture.py
│ │ ├── engineerror.py
│ │ ├── enginehelper.py
│ │ ├── enginesession.py
│ │ ├── fevalfuture.py
│ │ ├── futureresult.py
│ │ ├── __init__.py
│ │ ├── matlabengine.py
│ │ ├── matlabfuture.py
│ │ └── __pycache__
│ │ ├── basefuture.cpython-36.pyc
│ │ ├── engineerror.cpython-36.pyc
│ │ ├── enginehelper.cpython-36.pyc
│ │ ├── enginesession.cpython-36.pyc
│ │ ├── fevalfuture.cpython-36.pyc
│ │ ├── futureresult.cpython-36.pyc
│ │ ├── __init__.cpython-36.pyc
│ │ ├── matlabengine.cpython-36.pyc
│ │ └── matlabfuture.cpython-36.pyc
│ ├── __init__.py
│ ├── _internal
│ │ ├── __init__.py
│ │ ├── mlarray_sequence.py
│ │ ├── mlarray_utils.py
│ │ └── __pycache__
│ │ ├── __init__.cpython-36.pyc
│ │ ├── mlarray_sequence.cpython-36.pyc
│ │ └── mlarray_utils.cpython-36.pyc
│ ├── mlarray.py
│ ├── mlexceptions.py
│ └── __pycache__
│ ├── __init__.cpython-36.pyc
│ ├── mlarray.cpython-36.pyc
│ └── mlexceptions.cpython-36.pyc
├── matlabengineforpython-R2020a-py3.6.egg-info
└── __pycache__
├── check.cpython-36.pyc
├── __init__.cpython-36.pyc
├── kernel.cpython-36.pyc
└── __main__.cpython-36.pyc
7 directories, 41 files
```
可以參考[連結1](https://am111.readthedocs.io/en/latest/jmatlab_install.html)和[連結2](https://www.mathworks.com/help/matlab/matlab_external/install-the-matlab-engine-for-python.html)
## 9. 使用frp內網穿透
騰訊雲主機的`frps.ini`新增一行:
```ini
# 不需要和frpc.ini一致
vhost_http_port = 8888
```
執行jupyterlab的伺服器的`frpc.ini`新增一個部分:
```conf
[web]
type = http
local_port = 8888
custom_domains = lab.example.cn
```
如果要使用frp內網穿透的同時又給它設定域名,則域名解析記錄新增一條名稱為lab的A記錄到騰訊雲主機的IP(frps),在騰訊雲主機再新增一個nginx項:
```txt
server{
listen 80;
# 如果需要ssl,參考https://blog.whuzfb.cn/blog/2020/07/07/web_https/
# listen 443 ssl;
# include ssl/whuzfb.cn.ssl.conf;
# 此時支援http與https
server_name lab.example.cn;
access_log /home/ubuntu/frp_linux_amd64/log/access_jupyter.log;
error_log /home/ubuntu/frp_linux_amd64/log/error_jupyter.log;
# 防止jupyter儲存檔案時413 Request Entity Too Large
# client_max_body_size 50m; 0表示關閉檢測
client_max_body_size 0;
location /{
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_redirect off;
proxy_buffering off;
proxy_pass http://127.0.0.1:8888;
}
location ~* /(api/kernels/[^/]+/(channels|iopub|shell|stdin)|terminals/websocket)/? {
proxy_pass http://127.0.0.1:8888;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# WebSocket support
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
# ------- 舊方法:還是有部分報錯/api/kernels err_too_many_redirects ---------
# # 必須有,否則請求/api/kernels/ 的狀態碼都是400
# location /api/kernels/ {
# proxy_pass http://127.0.0.1:8888;
# proxy_set_header Host $host;
# # websocket support
# proxy_http_version 1.1;
# proxy_set_header Upgrade "websocket";
# proxy_set_header Connection "Upgrade";
# proxy_read_timeout 86400;
# }
# # 必須有,否則請求/terminals/ 的狀態碼都是400
# location /terminals/ {
# proxy_pass http://127.0.0.1:8888;
# proxy_set_header Host $host;
# # websocket support
# proxy_http_version 1.1;
# proxy_set_header Upgrade "websocket";
# proxy_set_header Connection "Upgrade";
# proxy_read_timeout 86400;
# }
}
```
## 10. VSCode連線jupyter
由於jupyterlab可以執行在本地指定埠,所以可以通過IP和埠在客戶自己瀏覽器進行遠端開發(保證遠端伺服器的`jupyter lab`開機自啟服務),這在區域網內很方便,但是對於沒有公網IP的話,就無法使用此功能
好在VSCode可以直接開啟遠端jupyter,具體操作如下
* 在客戶本地機器安裝`Remote Development`三件套外掛,然後選擇`Remote-SSH: Connect to host`,可以在本地提前建立配置檔案(`C:\Users\zfb\.ssh\config`或者`C:\ProgramData\ssh\ssh_config`),內容類似:
```conf
# 第一個遠端機器
Host mylab
HostName 54.33.135.211
Port 22
User ubuntu
```
* 根據提示輸入遠端伺服器的密碼即可連線成功,然後在遠端伺服器安裝`Python`、`Pylance`、`IntelliCode`這三個外掛,開啟遠端伺服器的資料夾,建立一個副檔名為`ipynb`的檔案,然後VSCode會自動提示選擇Python版本(既可以選擇系統的,也可以根據路徑選擇某個虛擬環境裡面的),接著VSCode會自動連線Kernel,使用者可以在右上角檢視當前Kernel的狀態或者切換Kernel
## 11. ssh連線jupyter在本地開啟
在瀏覽器使用遠端ip:port的方法,則伺服器必須有公網,而且還費流量,另一種方法,ssh連線,然後埠對映
伺服器1:處於內網,已安裝frpc,使用者名稱為zfb,已安裝配置好jupyterlab,執行在8888埠
雲主機2:處於公網,ip為56.78.12.34,已安裝frps,使用者名稱為ubuntu,僅用於伺服器的內網穿透,埠7001為伺服器1提供ssh轉發
執行以下命令,把使用者3的電腦的本地埠8080繫結到伺服器1的埠8888:
`ssh -p 7001 -NL localhost:8080:localhost:8888 [email protected]`
此時在使用者3的本機開啟網址`http://127.0.0.1:8080`即可訪問伺服器1的jupyterlab
## 12. matplotlib安裝
首先在虛擬環境jupyter安裝matplotlib庫和ipympl庫,後者用於顯示可互動圖形
```bash
# 啟用虛擬環境jupyter
source jupyter/bin/activate
# 在虛擬環境jupyter安裝matlab_kernel
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple matplotlib ipympl
```
重新開啟瀏覽器會提示rebuild,點選確定。等待build成功然後點選reload即可正常使用此外掛,如下程式碼
```python
%matplotlib widget
import pandas as pd
import numpy as np
import matplotlib
from matplotlib import pyplot as plt
ts = pd.Series(np.random.randn(1000), index=pd.date_range('1/1/2000', periods=1000))
ts = ts.cumsum()
df = pd.DataFrame(np.random.randn(1000, 4), index=ts.index,
columns=['A', 'B', 'C', 'D'])
df = df.cumsum()
df.plot()
plt.legend(loc='best')
plt.title('我是中文')
```
如果中文亂碼,則[糾正中文亂碼](https://blog.whuzfb.cn/blog/2020/07/02/matplotlib_tricks)
## 13. 使用plotly顯示python程式繪製的圖片
使用方法見[官網](https://plotly.com/python/getting-started),python的使用不需要key和使用者名稱,直接用就行
## 14. 使用plotly顯示matlab的圖片
詳細使用方法見[官網教程](https://plotly.com/matlab/getting-started/)。註冊plotly的[chart-studio](https://chart-studio.plotly.com/Auth/login/)賬號,然後在個人賬戶的`setting`點選`api keys`,選擇`Regenerate key`,記住這個key和自己的使用者名稱。然後下載[壓縮包](https://github.com/plotly/MATLAB-Online/archive/master.zip)並解壓,開啟matlab,輸入
```txt
>> cd ~/plotly-graphing-library-for-matlab-master/
>> plotlysetup('DemoAccount', 'lr1c44zw81') % 回車,剩下的內容都是自動執行
Adding Plotly to MATLAB toolbox directory ... Done
Welcome to Plotly! If you are new to Plotly please enter: >> plotlyhelp to get started!
```
此時會建立檔案`~/.plotly/.credentials`,裡面已經儲存使用者名稱和key(注意該使用者需要有`toolbox`的寫入許可權)
然後在jupyterlab寫:
```matlab
[X,Y,Z] = peaks;
contour(X,Y,Z,20);
% 個人使用者還是用離線模式吧,否則只能建立100個圖,還必須是公開分享
getplotlyoffline('https://cdn.plot.ly/plotly-latest.min.js')
fig2plotly(gcf, 'offline', true)
```
該命令會在當前目錄生成一個html檔案,雙擊開啟即可
**注意:** 如果發現在其他目錄無法使用`fig2plotly`函式,則可能是上一步驟,將plotly新增到Matlab工具箱出現了問題。可以自己手動將其複製到指定工具箱路徑,或者直接把`plotly-graphing-library-for-matlab-master`資料夾的絕對路徑新增到`Matlab PATH`
## 15. 使用plotly繪製matlab的包含ColorBar的圖片
如果正在使用新版Matlab(R2019a以後),在`.m`檔案中如果使用`colorbar`函式,則在呼叫plotly時候可能會遇到報錯
```txt
Insufficient number of outputs from right hand side of equal sign to satisfy assignment.
Error in findColorbarAxis (line 8)
colorbarAxis = obj.State.Axis(colorbarAxisIndex).Handle;
Error in plotlyfig/update (line 557)
colorbarAxis = findColorbarAxis(obj, handle(cols(c)));
Error in plotlyfig (line 208)
obj.update;
Error in fig2plotly (line 44)
p = plotlyfig(varargin{:});
```
參考[連結](https://github.com/plotly/plotly-graphing-library-for-matlab/pull/146),於是開啟檔案`findColorBarAxis.m`:
```bash
# 若Matlab的Plotly工具箱安裝位置為/home/Polyspace/R2020a/toolbox/plotly
sudo vi /home/Polyspace/R2020a/toolbox/plotly/plotlyfig_auz/helpers/findColorBarAxis.m
```
整個檔案內容替換為如下:
```matlab
function colorbarAxis = findColorbarAxis(obj,colorbarHandle)
if isHG2
colorbarAxisIndex = find(arrayfun(@(x)(isequal(getappdata(x.Handle,'ColorbarPeerHandle'),colorbarHandle)),obj.State.Axis));
% If the above returns empty then we are on a more recent Matlab
% release where the appdata entry is called LayoutPeers
if isempty(colorbarAxisIndex)
colorbarAxisIndex = find(arrayfun(@(x)(isequal(getappdata(x.Handle,'LayoutPeers'),colorbarHandle)),obj.State.Axis));
end
else
colorbarAxisIndex = find(arrayfun(@(x)(isequal(getappdata(x.Handle,'LegendColorbarInnerList'),colorbarHandle) + ...
isequal(getappdata(x.Handle,'LegendColorbarOuterList'),colorbarHandle)),obj.State.Axis));
end
colorbarAxis = obj.State.Axis(colorbarAxisIndex).Handle;