Thanks, yes, but I had expected that in the second command it would give me
an Int64 Array, similar as in the 1st command I get automatically an Int64
scalar. But to be fair, like this it is already much better than Matlab:
>> int32(5370)*8640
ans =
2147483647
>> [int32(5370)]*8640
julia> Int32[5730]*Int32(86400)
1-element Array{Int32,1}:
495072000
should certainly give the in memory smaller Int32 Array (and InexactError
if applicable). But an Int32 Array times an Int64 scalar could well give
automatically an Int64 array, I think. Then
julia> Int32[5730]*1
and similar
> Thanks, yes, but I had expected that in the second command it would give me
> an Int64 Array,
This would mean that multiplying a Int32 array by a Int64 would double
its size and be considerably slower. If the array is large, then that
could be problematic.
> similar as in the 1st command I get
Le jeudi 03 décembre 2015 à 06:36 -0800, Stephan Buchert a écrit :
> julia> Int32[5730]*Int32(86400)
> 1-element Array{Int32,1}:
> 495072000
>
> should certainly give the in memory smaller Int32 Array (and
> InexactError if applicable). But an Int32 Array times an Int64 scalar
> could well give a
Yes, certainly one can argue here back and forth:
julia> Int32[5730]*86400e3
1-element Array{Float64,1}:
4.95072e11
julia> Int32[5730]*86400f3
1-element Array{Float32,1}:
4.95072e11
i.e. promotion also here the same as for scalar*scalar. My data are from
hardware sensors or counters, which de
I think we should move to having scalar+scalar, scalar+array and
array+array promotions behave the same. We started out having scalar*scalar
operations promote quite liberally. For example, Int8+Int8 promoted to Int
rather than giving an Int8 result even though both arguments are of that
type, base
Issue opened: https://github.com/JuliaLang/julia/issues/14252.
On Thu, Dec 3, 2015 at 11:53 AM, Stefan Karpinski
wrote:
> I think we should move to having scalar+scalar, scalar+array and
> array+array promotions behave the same. We started out having scalar*scalar
> operations promote quite libe
