[vtkusers] How to get the IDs of min and max from a GetRange() ?

[David Cole]

Thanks, Cory. That was really much more helpful than my previous
(semi-glib) reply...


On Tue, Jul 7, 2015 at 5:39 PM, Cory Quammen <cory.quammen at kitware.com> wrote:
> You can use the LookupValue() member function, e.g.,
>
> // Assuming vtkScalars is a subclass of vtkDataArray
> minIndex = vtkScalars.LookupValue(minValue)
> maxIndex = vtkScalars.LookupValue(maxValue)
>
> This will do the scanning David mentioned and return (probably) the first
> index that matches the value you are querying.
>
> There is even a variant that puts all the IDs with the query value in a
> vtkIdList. See
>
> http://www.vtk.org/doc/release/6.2/html/classvtkDataArrayTemplate.html#aefa527440fb06df9da217831f2bf3704
>
> Hope that helps,
> Cory
>
> On Tue, Jul 7, 2015 at 3:35 PM, David Cole via vtkusers <vtkusers at vtk.org>
> wrote:
>>
>> 0 0 1 2 8 9 10 9 0 0 0 9 10 9 8 6 4 3 0 0
>>
>>   What's the index of 10?
>>
>> :-P
>>
>>
>> You'll have to scan looking for the first or last index, I think,
>> since, in general, the min and max may occur any number of times in a
>> data set.
>>
>> HTH,
>> David C.
>>
>>
>>
>>
>> On Tue, Jul 7, 2015 at 4:30 PM, mightos <mightos at gmail.com> wrote:
>> > Hello
>> >
>> > Let's say I have a vtkScalars with 100000 values.
>> > I would like to know the minimum and maximum values and their position
>> > in
>> > the vtkScalars.
>> >
>> > I currently use vtkScalars.GetRange()[0] to get the minimum value and
>> > vtkScalars.GetRange()[1] for the maximum. However, I was wondering how I
>> > could get the indexes from that.
>> >
>> > Any help is welcome :)
>> >
>> >
>> >
>> > --
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>> > Sent from the VTK - Users mailing list archive at Nabble.com.
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>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.