Matrix error

> Hi,
>
> I was testing the code here:
>
> =[1]=========
>
> | medMatrix   |
> medMatrix := Matrix new.
> medMatrix
>     numberOfColumns: 7;
>     numberOfRows: 5.
>
> 1 to: medMatrix numberOfRows do: [:row |
>     1 to: medMatrix numberOfColumns do: [ :column |
>         "medMatrix at: row at: column  put: 0."
>         Transcript show: row asString, ',', column asString, '|'.
>     ].
>     Transcript show: cr.
> ].
> medMatrix.
>
> ===========
>
> and I got a transcript like this:
>
> =[2]==========
> 1,1|1,2|1,3|1,4|1,5|1,6|1,7|nil2,1|2,2|2,3|2,4|2,5|2,6|2,7|nil3,1|3,2|3,3|3,4|3,5|3,6|3,7|nil4,1|4,2|4,3|4,4|4,5|4,6|4,7|nil5,1|5,2|5,3|5,4|5,5|5,6|5,7|nil'[Spotter]
> Exception while collecting processors for <Matrix>: Error: Instances
> of UndefinedObject are not indexable'
> '[Spotter] Exception while collecting processors for <Matrix>: Error:
> Instances of UndefinedObject are not indexable'
> '[Spotter] Exception while collecting processors for <Matrix>: Error:
> Instances of UndefinedObject are not indexable'
> '[Spotter] Exception while collecting processors for <Matrix>: Error:
> Instances of UndefinedObject are not indexable'
> =============
>
> I tried also with SciSmalltalk matrix, but they seem to be only square
> ones.
>
> What's is the problem with matrices? Why I'm getting Undefined Objects
> while trying to iterate or populate them?
>
> Thanks,
>
> Offray
>
>

> Hi Offray,
> you could try this:
>
> medMatrix:=Matrix rows: 5 columns: 7.
> 1 to: medMatrix numberOfRows do: [:row |
>     1 to: medMatrix numberOfColumns do: [ :column |
>         medMatrix at: row at: column  put: 0.
>         Transcript show: row asString, ',', column asString, '|'.
>     ].
>     Transcript  cr.
> ]."see transcript"
> medMatrix.
> "(0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 )"
> "in scismalltalk:"
> m2:=DhbMatrix rows: ((1 to: 5) collect:[:i|(Array new:7)]).
> 1 to: m2 numberOfRows do: [:row |
>     1 to: m2 numberOfColumns do: [ :column |
>         m2 at: row at: column  put: 0.
>         Transcript show: row asString, ',', column asString, '|'.
>     ].
>     Transcript  cr.
> ]."see transcript"
> m2.
> "a DhbVector(0 0 0 0 0 0 0)
> a DhbVector(0 0 0 0 0 0 0)
> a DhbVector(0 0 0 0 0 0 0)
> a DhbVector(0 0 0 0 0 0 0)
> a DhbVector(0 0 0 0 0 0 0)"
>
>
> werner
>
>