when I use the slider in MATLAB gui to display images stored in a matrix an error is shown.

Since am performing image processing techniques after storing the data in the matrix, its required that I use setappdata and getappdata to move the data around.However after I pass it to the final function , after about 9 frames the 10th frame gives an error.

the error being-

Error using images.internal.imageDisplayValidateParams>validateCData (line 115)
Multi-plane image inputs must be RGB images of size MxNx3.

Error in images.internal.imageDisplayValidateParams (line 27)
common_args.CData = validateCData(common_args.CData,image_type);

Error in images.internal.imageDisplayParseInputs (line 78)
common_args = images.internal.imageDisplayValidateParams(common_args);

Error in imshow (line 223)
  [common_args,specific_args] = ...

Error in MAINTRIAL2>slider2_Callback (line 240)
imshow(P(:,:,C1),'parent',handles.axes6);

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in MAINTRIAL2 (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)MAINTRIAL2('slider2_Callback',hObject,eventdata,guidata(hObject)),

Please do help

Answer 1

[Walter Roberson]

C1 = str2double( get(handles.edit2,'String') );

Or better yet, just index by C as it is already the numeric value.

[Deandra Dsouza]

worked like a charm! thanks!

Answer 2

[Image Analyst]

What does this code show in the command window if you put it just before line 240:

whos P
whos C1
C1

What happens if you visit this link?

[Deandra Dsouza]

C=get(hObject,'Value');
% tr2=(tr1);
assignin('base','sliderVal',C);
set(handles.edit2,'String',num2str(round(C)));
C1=get(handles.edit2,('String'));
disp('C1')
disp(C1)
disp('C')
disp(C)
P=getappdata(0,'Segmented');
O=getappdata(0,'thresholding');
% figure();
% subplot(1,2,1);
imshow(P(:,:,C1),'parent',handles.axes6);
% subplot(1,2,2);
imshow(O(:,:,C1),'parent',handles.axes7);
guidata(hObject,handles);

[Image Analyst]

That's not the code I gave you. There is no whos and I didn't say to use disp(). Anyway, try this:

C1 = str2double(handles.edit2.String);

I recommend you don't use assignin() and pick more descriptive names than C, C1, P, and (worst of all!) O.