Dear Dr. Lai,

The weight maps do not represent the results of a univariate statistical test (like SPM). They are not p-values and they cannot be thresholded. The next version of PRoNTo will include new functionalities that will help with the interpretation of the regions.
However, you can test the significance of your model's accuracy by running a permutation test (1000 permutations ideally, but you can probably get away with 100 if the model takes a long time to run).

As for improving accuracy, it will depend largely on the quality of your data and pre-processing.
However, the different algorithms provided in PRoNTo may give you different accuracies.
The next version of PRoNTo will include hyper-parameter optimisation, which could also improve accuracy.

Best,
João

On 14/12/14 07:07, Stephen Lai wrote:

Dear PRoNTo manager:

Thank you for your kind reply. It seems to fix the bug via the method. Can I ask if there is any statistical or significant differences for the different colorscheme? 

In addition, how should I increase the classification accuracy and probability?

Best

Dr. Lai

2014-12-10 18:27 GMT+08:00 João Matos Monteiro <[log in to unmask]>:

Hello,

This is indeed a curious error, but it is very difficult to find the problem without having direct access to the whole procedure.
However, if you can load the image weights on the right panel, you can then change the colour scale.

On the menu bar at the top go to Edit > Colormap
A new window will appear, in that window go to Tools > Standard Colormaps and select "Jet".
You can also select another colorsheme, or even make your own using the tools in that window.

I hope it helps.

Best,
João

 

On 10/12/14 09:41, eraldo.paulesu wrote:

Hallo

I am facing the same error

I was able to load the weights images on the right panel where the structural image should be loaded 

However the proper colour scale was missing

EP

Inviato da iPhone

Il giorno 10/dic/2014, alle ore 03:53, Stephen Lai <[log in to unmask]> ha scritto:

---------- Forwarded message ----------
From: Stephen Lai <[log in to unmask]>
Date: 2014-12-10 10:53 GMT+08:00
Subject: Fwd: the bug about the display of weighted images
To: PRoNTo users <[log in to unmask]>

Dear PRoNTo manager:

I ever sent the error message and bug which I hope you can give me the basic answer.

However, it seems nobody gives us the answer.

Does it mean you don't want to give us the instructions how to fix the bug?

Dr. Lai

---------- Forwarded message ----------
From: Stephen Lai <[log in to unmask]>

Date: 2014-12-05 21:27 GMT+08:00
Subject: Fwd: the bug about the display of weighted images
To: PRoNTo users <[log in to unmask]>

---------- Forwarded message ----------
From: Stephen Lai <[log in to unmask]>
Date: 2014-12-05 21:26 GMT+08:00
Subject: the bug about the display of weighted images
To: PRoNTo users <[log in to unmask]>

Dear all PRoNTo users and experts:

Recently I worked on the the display of the weighted images, then I faced the following error information.

Can anybody give me some suggestions to debug this problem?

Many thanks

Dr. Lai

??? Incorrect number of right hand side elements in dot name assignment.  Missing [] around left hand side is a likely cause.

Error in ==> spm_orthviews>specify_image at 731
V.ax = cell(3,1);

Error in ==> spm_orthviews at 220
        H = specify_image(varargin{1});

Error in ==> prt_ui_results>weightbutton_Callback at 492
h  = spm_orthviews('Image', handles.wmap,[0.0619 0.0859 0.40 0.4196]);

Error in ==> gui_mainfcn at 96
        feval(varargin{:});

Error in ==> prt_ui_results at 48
    gui_mainfcn(gui_State, varargin{:});

Error in ==> @(hObject,eventdata)prt_ui_results('weightbutton_Callback',hObject,eventdata,guidata(hObject))

 
??? Error while evaluating uicontrol Callback

-- 
João Matos Monteiro
MPhil/PhD Student
Computer Science Department,
University College London,
Gower Street, WC1E 6BT, London

-- 
João Matos Monteiro
MPhil/PhD Student
Computer Science Department,
University College London,
Gower Street, WC1E 6BT, London