我现在有一组数,请问有无函数可以得到该组数的变化率呢(就是求差分)?
似乎没有,但很好自己写
julia> function delta(v::Vector{T}) where T<:Number
l=length(v)
v2=Vector{T}(undef,l-1)
for i in 1:l-1
v2[i]=v[i+1]-v[i]
end
return v2
end
delta (generic function with 1 method)
julia> delta([1,4,9,16])
3-element Vector{Int64}:
3
5
7
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哦哦知道了,非常感谢!
diff 函数,紫薯
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