macbook安装cocoapods时碰到一个报错:大概率是ruby的版本太低导致的
sudo gem install cocoapods
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.
...
Could not create Makefile due to some reason, probably lack of
neces…
Backtrader 文档学习- Plotting -Plotting on the same axis
1.概述
在同一轴上绘图,绘图是在同一空间上绘制原始数据和稍微(随机)修改的数据,但不是在同一轴上。
核心代码,data数据正负50点。
# The filter which changes the close pri…