That's an entirely different meaning, gives a 5x1 sparse matrix with 5
nonzeros.
In Matlab, sparse(2,1,-1,10,1) gives a 10x1 sparse matrix with one nonzero,
value -1 at row 2, column 1.
In Julia, sparse([2], [1], [-1], 10, 1) works but is godawfully ugly.
On Monday, April 14, 2014 1:25:27 PM UTC-7, David P. Sanders wrote:
>
>
>
> El lunes, 14 de abril de 2014 04:42:47 UTC-5, Tony Kelman escribió:
>>
>> Anybody else get a "no method sparse(Int64, Int64, Array{Int64,1}, Int64,
>> Int64, Function)" when you try b = sparse(2,1,-1,10,1), or just me (win64,
>> bf709c)?
>>
>
> I get the same on Mac, Commit aadabde* (2014-04-06 20:48 UTC)
>
> Should be b = sparse( [2,1,-1,10,1] ) apparently.
>
>
>
>
>>
>> Aside from that, A\full(b) should work in this case.
>>
>>
>> On Sunday, April 13, 2014 11:40:02 PM UTC-7, Jameson wrote:
>>>
>>> IIRC, spare division requires b to be a dense vector.
>>>
>>> However, I don't suppose there's a reason Julia can't do the
>>> conversion. Open an issue, and if someone has a reason it isn't a good
>>> idea, they'll say so and close it. (you are welcome to still reply
>>> and/or reopen it at that point too). As Andreas mentioned, it helps if
>>> you can include a complete snippet of code that can be pasted into the
>>> terminal to repeat the issue
>>>
>>> On Mon, Apr 14, 2014 at 2:11 AM, Andreas Noack Jensen
>>> <[email protected]> wrote:
>>> > Hi Kai
>>> >
>>> > Welcome to Julia and thank you for reporting the problem. It is good
>>> > practice to include an example that can be copy-pasted into the
>>> terminal. It
>>> > makes it easier to investigate the problem. Please also provide the
>>> output
>>> > from versioninfo().
>>> >
>>> >
>>> > 2014-04-14 3:32 GMT+02:00 coolzai <[email protected]>:
>>> >
>>> >> Hi,
>>> >> I have two sparse matrix. For example A = sparse(i,j,v); b =
>>> >> sparse(2,1,-1,10,1);
>>> >>
>>> >> I want to solve the equation Ax = b... when I try to do that:
>>> A\b, it
>>> >> will return error:
>>> >>
>>> >> ERROR: no method
>>> >>
>>> A_ldiv_B!(SparseMatrixCSC{Float64,Int64},SparseMatrixCSC{Int64,Int64})
>>> >>
>>> >> in \ at linalg/generic.jl:108
>>> >>
>>> >>
>>> >> I was wondering how can I solve the linear equation?
>>> >>
>>> >>
>>> >> Thanks
>>> >>
>>> >> Kai
>>> >
>>> >
>>> >
>>> >
>>> > --
>>> > Med venlig hilsen
>>> >
>>> > Andreas Noack Jensen
>>>
>>
