[Eeglablist] Issue with user-specified map limits in topoplot

[Makoto Miyakoshi]

Dear Nicolas,

> We do not see that issue with EEG data that has both positive and
negative values (eg ERPs), we only see that with data with only positive
values (eg p-values, raw itc).

Hmm that's a critical information. The topo maps are made so that in the
color scale 0 is always centered, which may be related to this issue?
Anyway, thank you for filing the problem.

Makoto

On Thu, Aug 18, 2016 at 9:47 PM, Nicolas Escoffier <
nicolas.escoffier at nus.edu.sg> wrote:

> Thanks Makato!
>
> I checked with colleagues and we are getting the same issue in Matlab 2010
> and eeglab 13_5_4b.
>
> We do not see that issue with EEG data that has both positive and negative
> values (eg ERPs), we only see that with data with only positive values (eg
> p-values, raw itc).
>
> We'll file a bug report.
>
> Cheers,
> Nicolas
>
>
> On 19/08/2016 05:53, Makoto Miyakoshi wrote:
>
> Dear Nicolas,
>
> I recently used it on 2013a but had no problem. This sounds like Matlab
> version related bug, though I haven't tested it myself.
>
> If you think that's a bug (does it work on 2013a but not in 2015a?),
> please file it to EEGLAB bugzilla for fix.
> https://sccn.ucsd.edu/bugzilla/enter_bug.cgi
> I appreciate your patience and cooperation.
>
> Makoto
>
> On Wed, Aug 17, 2016 at 8:55 PM, Nicolas Escoffier <
> nicolas.escoffier at nus.edu.sg> wrote:
>
>> Dear all,
>>
>> I am plotting topographic data using topoplot and want to set the color
>> scale limit for my data. I am using the 'maplimit' option to set a limit
>> using [min of scale, max of scale].
>>
>> On the figure, the scaling of the colorbar does not match my settings,
>> and instead is shifted. I could not figure out whether the labels are
>> off or whether the scaling is off. It seems to be specific to data with
>> only positive values.
>>
>> Please see some code below with random data between 0 and 1.
>>
>> figure;
>> ylim = [.5 1];
>> topoplot(rand(64,1), chanlocs, 'maplimits', ylim);
>> cbar;
>>
>> I am using EEGLab 13_5_4b, matlab R2015a. Has anyone else encountered
>> this problem before? Thanks in advance!
>>
>> Cheers,
>> Nicolas
>>
>>
>>
>>
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>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>
>
>
> ------------------------------
>
> Important: This email is confidential and may be privileged. If you are
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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