I found that I often have to force this conversion, which is not too
difficult. The question why comprehension has to build with type Any?
On 2014年11月04日 07:06, Miguel Bazdresch wrote:
> How could I force the type of gxs1 to be of an array of Float64?
The simplest way is:
gxs1 = Float64[g(x) for x in xs]
-- mb
On Mon, Nov 3, 2014 at 6:01 PM, Evan Pu <[email protected]
<mailto:[email protected]>> wrote:
Consider the following interaction:
julia> g(x) = 1 / (1 + x)
g (generic function with 1 method)
julia> typeof(g(1.0))
Float64
julia> xs = [1.0, 2.0, 3.0, 4.0]
4-element Array{Float64,1}:
1.0
2.0
3.0
4.0
julia> gxs1 = [g(x) for x in xs]
4-element Array{Any,1}:
0.5
0.333333
0.25
0.2
Why isn't gxs1 type of Array{Float64,1}?
How could I force the type of gxs1 to be of an array of Float64?
julia> gxs2 = [convert(Float64,g(x)) for x in xs]
4-element Array{Any,1}:
0.5
0.333333
0.25
0.2
somehow this doesn't seem to work...
