arrays - 将 float64 数组转换为 float32 数组

Question

我有一个 float64 数组，想将每个值转换为 float32。

我试过:

# What I have 
features64 [120]float64

# What I've tried
features32 = [120]float32(features64)

但这会导致编译错误:

cannot convert features (type [120]float64) to type [120]float32

Answer 1

您不能将一种 slice/数组类型转换为另一种。您需要创建一个新数组并遍历转换每个元素的原始数组:

for i,f := range features64 {
    features32[i] = float32(f)
}