Using a slider to move a cosine curve from the range of 1 to 100? - Homework

I am writing a GUI program where a slider has a range from 1 to 100, with default value of 50 at the beginning. The plot will show a cosine curve with x-values from 0 to the value set by the slider.

This is what I have so far. I am not sure what is wrong because I can't get the slider to work???

function varargout = cosscale1(varargin)

    gui_Singleton = 1;
    gui_State = struct('gui_Name',       mfilename, ...
                       'gui_Singleton',  gui_Singleton, ...
                       'gui_OpeningFcn', @cosscale_OpeningFcn, ...
                       'gui_OutputFcn',  @cosscale_OutputFcn, ...
                       'gui_LayoutFcn',  [] , ...
                       'gui_Callback',   []);
    if nargin && ischar(varargin{1})
        gui_State.gui_Callback = str2func(varargin{1});
    end

    if nargout
        [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
    else
        gui_mainfcn(gui_State, varargin{:});
    end
    % End initialization code - DO NOT EDIT

    % --- Executes just before cosscale is made visible.
    function cosscale_OpeningFcn(hObject, eventdata, handles, varargin)

    handles.output = hObject;

    set(handles.slider1, 'min', 1, 'max', 100, 'value', 50);

    %set the corresponding plotting range
    handles.range=50;

    % Update handles structure
    guidata(hObject, handles);

    % UIWAIT makes cosscale wait for user response (see UIRESUME)
    % uiwait(handles.figure1);

    fplot('cos', [0, 10]);
    xlabel('x');
    ylabel('cos(x)');

    % --- Outputs from this function are returned to the command line.
    function varargout = cosscale_OutputFcn(hObject, eventdata, handles) 

    varargout{1} = handles.output;

    function edit1_Callback(hObject, eventdata, handles)

    myplot(hObject, handles);

    % --- Executes on slider movement.
    function slider1_Callback(hObject, eventdata, handles)
     of slider
    handles.range=get(handles.slider1, 'Value');

    %plot the curve
    myplot(hObject, handles);

    guidata(hObject, handles);

    % --- Executes during object creation, after setting all properties.
    function slider1_CreateFcn(hObject, eventdata, handles)

    if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
        set(hObject,'BackgroundColor',[.9 .9 .9]);
    end

    %---the actual plotting functioin
    function myplot(hObject, handles)
    str=get(handles.edit1, 'String');
    fh=str2func(['@(x)',str]);

    x=0:0.1:handles.range;
    y = fh(x);

    plot(x, y, 'Parent', handles.axes1, 'Color', handles.cr);

????

Answer 1

[Image Analyst]

What happens when you set breakpoints and step through it with the debugger?

[Nora]

I get an error.

Error using load
Unable to read file 'cosscale1.fig': no
such file or directory.

Error in
graphics.internal.figfile.FigFile/read
(line 25)
hgDataVars = load(filename, '-mat',
'-regexp', '^hg[SO]');

Error in graphics.internal.figfile.FigFile
(line 98)
                obj.read(file);

Error in C:\Program Files
(x86)\MATLAB\R2013a
Student\toolbox\matlab\graphics\hgload.p>hgload
(line 59)

Error in openfig (line 72)
    [fig, savedvisible] = hgload(filename,
    struct('Visible','off'));

Error in gui_mainfcn>local_openfig (line
286)
    gui_hFigure = openfig(name, singleton,
    visible);

Error in gui_mainfcn (line 159)
        gui_hFigure =
        local_openfig(gui_State.gui_Name,
        gui_SingletonOpt, gui_Visible);

Error in cosscale1 (line 42)
    gui_mainfcn(gui_State, varargin{:});

[Image Analyst]

Sort of looks like you have an m-file created by GUIDE but you are missing the associated cosscale1.fig file.

[Nora]

No that is in the same folder and it is present. I think in the original script is where I didn't correctly do the scaler for the GUI. Do you know how to do that for the problem? (Look at original question)

[Image Analyst]

This would be so much easier if you would attach your files, so we can fix them and reattach them.

[Nora]

I fixed the problem. Thank you.

[Image Analyst]

So did I, in the answer to your duplicate question. I attach here again.