On 28 Mar 2017, at 13:46, Dev vasu wrote:

> Dear Sir,
>
> You are right, I am trying to view Gyrification maps by clicking "CAT 
> ->
> Analyze ROIs"  on CAT12 GUI template and later i specified contrasts
> ,perhaps this is my mistake . Could you please let me know whether i 
> can
> visualize changes in Gyrification between 2 groups after i specify the
> contrasts ?,  If so how could i do it . I have performed CAT 12 ->
> Statistical analysis and was able to generate SPM.mat file for all
> respective Gyrification label files.

after you have build the model:
1. Define contrasts
2. Call results

optionally
3. Analyze ROIs

Don’t mix that order because this will not work.

Best,

Christian

>
>
> Thanks
> Vasudev
>
> On 27 March 2017 at 17:05, Christian Gaser 
> <[log in to unmask]>
> wrote:
>
>> Dear Vasudev,
>>
>> the error clearly points to the ROI-analysis:
>>
>> Error in cat_stat_analyze_ROIs>estimate_GLM (line 387)
>>
>> The function cat_stat_analyze_ROIs.m will be only called by the 
>> button
>> „ROI analysis“ in the GUI nowhere else.
>>
>> Best,
>>
>> Christian
>>
>> On 27 Mar 2017, at 16:49, Dev vasu wrote:
>>
>> Dear Sir,
>>
>> I am not doing ROI analysis at present , this error is occurring when 
>> i
>> tried to compute vertex wise analysis, i could compute cortical 
>> thickness ,
>> but not gyrification.
>>
>>
>> Thanks
>> Vasudev
>>
>> On 27 March 2017 at 16:34, Christian Gaser 
>> <[log in to unmask]>
>> wrote:
>>
>>> Dear Vasudev,
>>>
>>> it looks like that you are trying to do the ROI analysis without 
>>> calling
>>> the results of the vertex-vise analysis before. If you want to use 
>>> the ROI
>>> analysis you not only have to estimate your model for the 
>>> vertex-vise data,
>>> but you need to define the respective contrasts in the contrast 
>>> manager and
>>> you have to call these results before you do the ROI analysis.
>>>
>>> I have no other explanation, because the missing field „eidf“ 
>>> should be
>>> saved if you have done the vertex-vise analysis before and call that
>>> results.
>>>
>>> Best,
>>>
>>> Christian
>>>
>>> On 21 Mar 2017, at 11:53, Dev vasu wrote:
>>>
>>> Dear Sir,
>>>
>>> I have done that , But i could not display Gyrification maps, i have
>>> asked this question earlier and i posting it  again
>>>
>>> "
>>> I am using CAT12 to extract Gyrification index , I have followed CAT 
>>> 12
>>> manual in order to generate lh and rh.gyrification.name.gii files 
>>> and
>>> performed smoothing , I have also performed statistical analysis on
>>>
>>> "S15mm.lh.gyrification.resampled.name.gii " files and generated 
>>> SPM.mat
>>> files for both lh and rh.gyrification surfaces. but when i try to 
>>> define
>>> contrasts and generate gyrification maps , i am incurring following 
>>> error :
>>> , could some one please let me know thats wrong with my approach.
>>>
>>>
>>> Reference to non-existent field 'eidf'.
>>>
>>> Error in cat_stat_analyze_ROIs>estimate_GLM (line 387)
>>> df   = [SPM.xCon(Ic).eidf SPM.xX.erdf];
>>>
>>> Error in cat_stat_analyze_ROIs (line 190)
>>> p = estimate_GLM(Y,X,SPM,Ic);
>>>
>>> Error in cat12>pushbutton174_Callback (line 409)
>>> cat_stat_analyze_ROIs;
>>>
>>> Error in gui_mainfcn (line 95)
>>>         feval(varargin{:});
>>>
>>> Error in cat12 (line 76)
>>>     gui_mainfcn(gui_State, varargin{:});
>>>
>>> Error in
>>> matlab.graphics.internal.figfile.FigFile/read>@(hObject,even
>>> tdata)cat12('pushbutton174_Callback',hObject,eventdata,guidata(hObject))
>>> Error while evaluating UIControl Callback
>>>
>>>
>>> Thanks
>>> Vasudev
>>>
>>> On 21 March 2017 at 11:07, Christian Gaser 
>>> <[log in to unmask]>
>>> wrote:
>>>
>>>> Dear Vasudev,
>>>>
>>>> CAT12-manual page 34:
>>>>
>>>> Extract optional surface parameters
>>>> You can also extract additional surface parameters that have to be
>>>> resampled and smoothed with the before mentioned tool.
>>>> CAT12->Surface Tools->Extract & Map Surface Data->Extract 
>>>> Additional
>>>> Surface Parameters Parameters:
>>>> o Central Surfaces <-X->Select the central surface data (e.g.
>>>> [lr]h.central.*)
>>>> o Gyrification index
>>>>   - Extract gyrification index (GI) based on absolute mean 
>>>> curvature.
>>>> The method is described in Luders et al. NeuroImage, 29: 1224-1230, 
>>>> 2006.
>>>> o Cortical complexity (fractal dimension)
>>>>   - Extract Cortical complexity (fractal dimension) which is 
>>>> described
>>>> in Yotter et al.
>>>> Neuroimage, 56(3): 961-973, 2011.
>>>>   - Warning: Estimation of cortical complexity is very slow!
>>>> o Sulcus depth
>>>>   - Extract sqrt-transformed sulcus depth based on the euclidean
>>>> distance between the central surface and its convex hull.
>>>>   - Transformation with sqrt-function is used to render the data 
>>>> more
>>>> normally distributed.
>>>>
>>>> Best,
>>>>
>>>> Christian
>>>>
>>>> On Fri, 17 Mar 2017 09:28:24 +0100, Dev vasu <
>>>> [log in to unmask]> wrote:
>>>>
>>>>> Dear Sir,
>>>>>
>>>>> I could extract Cortical thickness maps but  when i select 
>>>>> Gyrification
>>>> , i
>>>>> could not extract gyrification maps , could you please let me know 
>>>>> how i
>>>>> could extract gyrification Index values in  CAT12.
>>>>>
>>>>>
>>>>> Thanks
>>>>> Vasudev
>>>>>
>>>>
>>>>
>>>>
>>>
>>