[Paraview] "Plot Data" filter has problem with negative values

[Utkarsh Ayachit]

Ah! Yes, we have  been discussing offline that the "saving property
values to settings", which is nifty feature, can sometimes cause
confusion since it's not clear what has been modified from default and
it's easy to forget. Something to mull over. We probably need to think
about finer control over what gets saved to settings and then
indication in the UI of what is affected by local settings -- or
something along those lines.

Utkarsh

On Sun, Jan 29, 2017 at 2:34 PM, FERHAT HAMIDA Abdelhak
<a_ferhat_h at yahoo.fr> wrote:
> Thank you Utkarsh Ayachit
> After your reply, I found the origin of my problem.
> In a previous run, I used a semilog plot by enabling "Left Axis Log Scale"
> and saved the setting as default one. Paraview saves the setting in the file
> : $HOME/.config/ParaView/ParaView-UserSettings.json
>
> In the following runs, "Left Axis Log Scale" is enabled by default and
> ParaView do not accept negative values for "Left Axis Range Minimum" even if
> I disable  "Left Axis Log Scale".
>
> To solve the problem, I disable "Left Axis Log Scale", save the settings and
> restart ParaView. (If I do not restart, I still in the same situation until
> next run). The changes do not take effect in the current session.
>
> So, I this is not a normal behaviour, it can be a bug.
>
> Best regards.
>
>
>
>
>
>
>
>
> Le Dimanche 29 janvier 2017 17h35, Utkarsh Ayachit
> <utkarsh.ayachit at kitware.com> a écrit :
>
>
> I am not able to reproduce the problem. Attached is a state file and
> screenshot generated using ParaView 5.2.
>
> On Sun, Jan 29, 2017 at 10:33 AM, FERHAT HAMIDA Abdelhak via ParaView
> <paraview at paraview.org> wrote:
>> I want to plot a tabulated fonction (say F=cos(t)) using paraview which
>> reads the values of t and F from a csv file then the plot F-t is generated
>> by the "Plot Data" filter. t takes values in the [-1,+1] range.
>> The problem is:
>>
>> "Left Range Axis Maximum" can hold negative and positive values.
>> "Left Range Axis Minimum" can not hold only negative values or zero.
>>
>> Thi results in: negative values of the function are not plotted.
>> The only solution I found is to get a plot of the reverse function (-F) by
>> setting "Left Range Axis Maximum" to a (-1) and "Left Range Axis Minimum"
>> to
>> (+1) which is very strange (Maximum < Minimum). The csv data and the plot
>> are in the attached files.
>> So please is there a solution to this problem or is this a bug in
>> paraview?
>> Nota: I get this with paraview 4.4.0 and 5.2 versions on Centos 7.
>>
>>
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