Using a slider to move a cosine curve from the range of 1 to 100? - Homework
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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);
????
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采纳的回答
Image Analyst
2013-12-1
What happens when you set breakpoints and step through it with the debugger?
6 个评论
Image Analyst
2013-12-3
So did I, in the answer to your duplicate question. I attach here again.
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