Chris
Very strange. I get (Julia 0.4.2-pre+20
*julia> **a = [2 for i in 1:2, j in 1:2]*
*2x2 Array{Int64,2}:*
* 2 2*
* 2 2*
*julia> **b = copy(a)[:,:] + 1*
*2x2 Array{Int64,2}:*
* 3 3*
* 3 3*
-erik
On Fri, Dec 4, 2015 at 9:26 PM, Chris <[email protected]> wrote:
> Thanks for your suggestion, Charles. That certainly works, but something a
> little more general would be nice.
>
> Erik, copy(a)[:] + 1 still gives me an Array{Any,1}.
>
> Chris
>
> On Friday, December 4, 2015 at 9:09:46 PM UTC-5, Erik Schnetter wrote:
>>
>> You can write
>>
>> copy(a)[:] + 1
>>
>> The expression `a + 1` implicitly makes a copy of the array, adding one
>> to each element. The expression above does the same, but is more explicit
>> about the indexing, and thus keeps the types the same. In particular, my
>> expression
>> - first makes a copy of `a`
>> - then adds `1`, element-wise (thus not changing the array type
>> - then returns the array
>>
>> -erik
>>
>>
>> On Fri, Dec 4, 2015 at 8:48 PM, Charles Novaes de Santana <
>> [email protected]> wrote:
>>
>>> As you probably noted, I suggested a wrong function :( Sorry, I copied
>>> and pasted and didn't read
>>>
>>> here is the function I would like to suggest you:
>>>
>>> julia> function newsum(a::Array{Array{Int64,1},1}, i::Int)
>>> lengtha = size(a,1);
>>> return(a + [[i,i] for j = 1:lengtha])
>>> end
>>> newsum (generic function with 1 method)
>>>
>>> julia> newsum(a,1)
>>> 5-element Array{Array{Int64,1},1}:
>>> [2,2]
>>> [2,2]
>>> [2,2]
>>> [2,2]
>>> [2,2]
>>>
>>> best,
>>>
>>> Charles
>>>
>>>
>>> On 5 December 2015 at 02:45, Charles Novaes de Santana <
>>> [email protected]> wrote:
>>>
>>>> Hi Chris,
>>>>
>>>> Unfortunately I don't know why the type changes from
>>>> Array{Array{Int64,1},1}
>>>> to Array{Any,1}. But I have a suggestion to what you can do to keep it as
>>>> Array{Array{Int64,1},1}.
>>>>
>>>> My initial shot would be to do a + [[1,1] for i = 1:5] instead of a + 1
>>>> :
>>>>
>>>> julia> a + [[1,1] for i = 1:5]
>>>> 5-element Array{Array{Int64,1},1}:
>>>> [2,2]
>>>> [2,2]
>>>> [2,2]
>>>> [2,2]
>>>> [2,2]
>>>>
>>>> Or, if you want to simplify the way you do it, just define a function
>>>> like this:
>>>>
>>>> julia> function newsum(a::Array{Array{Int64,1},1}, i::Int)
>>>> lengtha = size(a,1);
>>>> return([[i,i] for i = 1:lengtha])
>>>> end
>>>> newsum (generic function with 1 method)
>>>>
>>>> julia> newsum(a,1)
>>>> 5-element Array{Array{Int64,1},1}:
>>>> [1,1]
>>>> [2,2]
>>>> [3,3]
>>>> [4,4]
>>>> [5,5]
>>>>
>>>> But I am sure you will find many more suggestions here! ;)
>>>>
>>>> Best,
>>>>
>>>> Charles
>>>>
>>>> On 5 December 2015 at 02:16, Chris <[email protected]> wrote:
>>>>
>>>>> I am confused about the following:
>>>>>
>>>>> julia> a = [[1,1] for i = 1:5]
>>>>> 5-element Array{Array{Int64,1},1}:
>>>>> [1,1]
>>>>> [1,1]
>>>>> [1,1]
>>>>> [1,1]
>>>>> [1,1]
>>>>>
>>>>> julia> a + 1
>>>>> 5-element Array{Any,1}:
>>>>> [2,2]
>>>>> [2,2]
>>>>> [2,2]
>>>>> [2,2]
>>>>> [2,2]
>>>>>
>>>>> Specifically, why does the type change from Array{Array{Int64,1},1} to
>>>>> Array{Any,1}, and what can I do to keep it as Array{Array{Int64,1},1}?
>>>>>
>>>>> Thanks,
>>>>> Chris
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Um axé! :)
>>>>
>>>> --
>>>> Charles Novaes de Santana, PhD
>>>> http://www.imedea.uib-csic.es/~charles
>>>>
>>>
>>>
>>>
>>> --
>>> Um axé! :)
>>>
>>> --
>>> Charles Novaes de Santana, PhD
>>> http://www.imedea.uib-csic.es/~charles
>>>
>>
>>
>>
>> --
>> Erik Schnetter <[email protected]>
>> http://www.perimeterinstitute.ca/personal/eschnetter/
>>
>
--
Erik Schnetter <[email protected]>
http://www.perimeterinstitute.ca/personal/eschnetter/
