jfk4123.m

电磁辐射的数值分析与仿真（基于MATLAB语言）。包括两个点电荷的电场

function varargout = jfk3(varargin)
% JFK3 M-file for jfk3.fig
%      JFK3, by itself, creates a new JFK3 or raises the existing
%      singleton*.
%
%      H = JFK3 returns the handle to a new JFK3 or the handle to
%      the existing singleton*.
%
%      JFK3('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in JFK3.M with the given input arguments.
%
%      JFK3('Property','Value',...) creates a new JFK3 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before jfk3_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to jfk3_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help jfk3

% Last Modified by GUIDE v2.5 10-Jun-2005 21:12:59

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @jfk3_OpeningFcn, ...
                   'gui_OutputFcn',  @jfk3_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(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 jfk3 is made visible.
function jfk3_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to jfk3 (see VARARGIN)

% Choose default command line output for jfk3
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes jfk3 wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = jfk3_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on button press in push1.
function push1_Callback(hObject, eventdata, handles)
% hObject    handle to push1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
kl=get(handles.slider1,'Value');
t=0:0.01:pi*2;
z=(cos(kl*pi.*cos(t))-cos(kl*pi))./sin(t).*sign(t-pi);
[y,x]=pol2cart(t,z);
axes(handles.axes1)
plot(x,y,'*')
set(handles.edit1,'string',num2str(kl));


% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB 
% handles    structure with handles and user data (see GUIDATA)
kl=get(handles.slider1,'Value');i=1
t=0:0.01:pi*2;
z=(cos(kl*pi.*cos(t))-cos(kl*pi))./sin(t).*sign(t-pi);
h=plot3(t,z.*sin(t(i)),z.*cos(t(i)),'*','erasemode','none');
axes(handles.axes1)
grid on;
axis([0 2*pi -3 3 -3 3]);
view([0 90])
for i=2:length(t)
    set(h,'xdata',t,'ydata',z.*sin(t(i)),'zdata',z.*cos(t(i)))
    drawnow;pause(0.2)
end



% --- Executes on button press in push3.
function push3_Callback(hObject, eventdata, handles)
% hObject    handle to push3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

close;
% --- Executes during object creation, after setting all properties.
function slider1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background, change
%       'usewhitebg' to 0 to use default.  See ISPC and COMPUTER.
usewhitebg = 1;
if usewhitebg
    set(hObject,'BackgroundColor',[.9 .9 .9]);
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end


% --- Executes on slider movement.
function slider1_Callback(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider


% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double


% --- Executes when figure1 window is resized.
function figure1_ResizeFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)