如何使用if语句使用脚本创建条件？

Question

我在if语句中遇到了一点挑战。我希望仅当代码（plotshape）为false时才打印下面的代码（plotchar）。如果代码（plotshape）为true，则不应打印代码（plotchar）

plotshape (show_atr_rule ? atrchecklocation : na, style=shape.circle, location=absolute, size=tiny, color=color.yellow, transp=20)

plotchar(codiff_long, color=color.green, location=location.abovebar, text="BUY", transp=0)
plotchar(codiff_short, color=color.red, location=location.belowbar, text="SELL", transp=0)

Answer 1

在plotchar函数的series参数内创建一个三元条件，方法与plotshape相同：

plotshape (show_atr_rule ? atrchecklocation : na, style=shape.circle, location=absolute, size=tiny, color=color.yellow, transp=20)

plotchar(show_atr_rule  ? na : codiff_long, color=color.green, location=location.abovebar, text="BUY", transp=0)
plotchar(show_atr_rule  ? na : codiff_short, color=color.red, location=location.belowbar, text="SELL", transp=0)