Jian Yuan

PSO seens cannot treat equal constraints

3

Hi, it seems the equation in PSO doesn't work effectively, this is the code: ``` def demo_func(x): x1, x2 = x return -20 * np.exp(-0.2 * np.sqrt(0.5 * (x1 **...

Spread Sheets中添加value()函数报错

2

在Sheets中添加如下代码： `=value(IMPORTXML("https://coinmarketcap.com/currencies/bitcoin/markets/", "//div[contains(@class, 'priceValue___11gHJ')]"))` 显示未`#VALUE`,具体提示为：“VALUE”的参数“$37,598.72”无法解析为数字，请问笑来老师这是怎么回事呢？