没有与^

Question

我在Julia中创建了UnitRange，并尝试针对x和x创建x ^ 2的图。我已经编写了以下代码。

x = [-10:10]
p1 = plot(x, x)
p2 = plot(x, x.^2)

我遇到以下错误：

MethodError: no method matching ^(::UnitRange{Int64}, ::Int64)
Closest candidates are:
  ^(!Matched::Float16, ::Integer) at math.jl:795
  ^(!Matched::Missing, ::Integer) at missing.jl:120
  ^(!Matched::Missing, ::Number) at missing.jl:93
  ...

Stacktrace:
 [1] _broadcast_getindex at ./none:0 [inlined]
 [2] getindex at ./broadcast.jl:515 [inlined]
 [3] copy at ./broadcast.jl:790 [inlined]
 [4] materialize(::Base.Broadcast.Broadcasted{Base.Broadcast.DefaultArrayStyle{1},Nothing,typeof(Base.literal_pow),Tuple{Base.RefValue{typeof(^)},Array{UnitRange{Int64},1},Base.RefValue{Val{2}}}}) at ./broadcast.jl:756
 [5] top-level scope at In[18]:3

我的代码有什么错误？

Answer 1

您可以更改：

x.^2

收件人：

x[1].^2