matlab.error graphics.i​nternal.fi​gfile.FigF​ile/read>@​(hObject,e​ventdata)M​TF_Radial(​'pushbutto​n4_Callbac​k',hObject​,eventdata​,guidata(h​Object)) Error while evaluating UIControl Callback

i try to do segmentation on image, but there are error like this,

Error: File: f_SegmentasiHU.m Line: 1 Column: 34
Unexpected MATLAB operator.

Error in MTF_Radial>pushbutton4_Callback (line 181)
[DB]=f_SegmentasiHU(D2); %melakukan segmentasi

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

Error in MTF_Radial (line 16)
    gui_mainfcn(gui_State, varargin{:});

and the programs for error File: f_SegmentasiHU.m Line 1 Column:34

function [IC]=f_SegmentasiHU(img1.IMA);  

and the program for error in MTF_Radial>pushbutton4_Callback(line 181)

function pushbutton4_Callback(hObject, eventdata, handles)
mydatacontainer=getappdata(0,'datacontainer');
D3=getappdata(mydatacontainer,'gambar');
FV=getappdata(mydatacontainer,'FV');
Miring=getappdata(mydatacontainer,'Kemiringan');
Potong=getappdata(mydatacontainer,'Perpotongan');
Spasi=getappdata(mydatacontainer,'Space');
Number=str2double(get(handles.edit1,'string'));
Citra=D3(:,:,Number);
[D2]=f_HU(Citra, Miring, Potong);
[DB]=f_SegmentasiHU(D2); %melakukan segmentasi
axes(handles.axes1);
imshow(D2,'DisplayRange',[]);
DBP = bwmorph(DB,'remove'); %mengambilbagian pinggir citra
[n m]=size(DBP);
p=0;

Answer 1

[Geoff Hayes]

Nazil - the problem is with your function signature

function [IC]=f_SegmentasiHU(img1.IMA);

Note how you are defining the (only) input parameter as img1.IMA using the period '.' which is invalid given the context. Try just using

function [IC]=f_SegmentasiHU(img1)

instead (note that I've removed the semi-colon from the end of the line too - there shouldn't be any need for it).