结果显示和图象显示问题

laojiang

我编写了一个截面，在指定位置输入数据，便在相应的位置显示结果和图象，程序如下：
function varargout = jiangxiaohuai(varargin)
% JIANGXIAOHUAI M-file for jiangxiaohuai.fig
%      JIANGXIAOHUAI, by itself, creates a new JIANGXIAOHUAI or raises the existing
%      singleton*.
%
%      H = JIANGXIAOHUAI returns the handle to a new JIANGXIAOHUAI or the handle to
%      the existing singleton*.
%
%      JIANGXIAOHUAI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in JIANGXIAOHUAI.M with the given input arguments.
%
%      JIANGXIAOHUAI('Property','Value',...) creates a new JIANGXIAOHUAI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before jiangxiaohuai_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to jiangxiaohuai_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 jiangxiaohuai

% Last Modified by GUIDE v2.5 26-May-2007 20:12:15

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @jiangxiaohuai_OpeningFcn, ...
                   'gui_OutputFcn',  @jiangxiaohuai_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 jiangxiaohuai is made visible.
function jiangxiaohuai_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 jiangxiaohuai (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = jiangxiaohuai_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 pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

k2=str2num(get(findobj('tag','edit1'),'string')); %从edit9中读取数字
k4=str2num(get(findobj('tag','edit2'),'string')); %从edit10中读取数字
k5=str2num(get(findobj('tag','edit3'),'string'));  %从edit11中读取数字
u=str2num(get(findobj('tag','edit4'),'string'));   %从edit5中读取数字
index=get(handles.popupmenu1,'value'); %从popupmenu1中选择变量
p=sym(get(findobj('tag','edit6'),'string'));
switch  index
    case 1
        g=16e-6;
    case  2
        g=64e-6;
    case 3
        g=256e-6;
    case  4
        g=1024e-6;
     case 5
        g=4096e-6;
    case  6
        g=16384e-6;
end
t=(k2+k4+k5)*u*g*p;
x=int(t,0,35);
answer=char(p);
set(handles.edit5,'string',num2str(x)); %在edit1中显示运算结果
axes(handles.axes1);
cla;
ezplot(p,t);
hold on;

% --- 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 during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit2 (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 edit2_Callback(hObject, eventdata, handles)
% hObject    handle to edit2 (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 edit2 as text
%        str2double(get(hObject,'String')) returns contents of edit2 as a double


% --- Executes during object creation, after setting all properties.
function edit3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit3 (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 edit3_Callback(hObject, eventdata, handles)
% hObject    handle to edit3 (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 edit3 as text
%        str2double(get(hObject,'String')) returns contents of edit3 as a double


% --- Executes during object creation, after setting all properties.
function edit4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit4 (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 edit4_Callback(hObject, eventdata, handles)
% hObject    handle to edit4 (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 edit4 as text
%        str2double(get(hObject,'String')) returns contents of edit4 as a double


% --- Executes during object creation, after setting all properties.
function popupmenu1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu 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


% --- Executes on selection change in popupmenu1.
function popupmenu1_Callback(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns popupmenu1 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from popupmenu1


% --- Executes during object creation, after setting all properties.
function edit5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit5 (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 edit5_Callback(hObject, eventdata, handles)
% hObject    handle to edit5 (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 edit5 as text
%        str2double(get(hObject,'String')) returns contents of edit5 as a double


% --- Executes during object creation, after setting all properties.
function edit6_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit6 (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 edit6_Callback(hObject, eventdata, handles)
% hObject    handle to edit6 (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 edit6 as text
%        str2double(get(hObject,'String')) returns contents of edit6 as a double
　
显示的错误为
??? Error using ==> fix
Function 'fix' is not defined for values of class 'sym'.

Error in ==> C:\MATLAB6p5p1\toolbox\matlab\strfun\num2str.m
On line 32  ==> if nargin < 2 & ~isempty(x) & all(all(x==fix(x)))

Error in ==> C:\MATLAB6p5p1\work\jiangxiaohuai.m (pushbutton1_Callback)
On line 105  ==> set(handles.edit5,'string',num2str(x)); %在edit1中显示运算结果

Error in ==> C:\MATLAB6p5p1\toolbox\matlab\uitools\gui_mainfcn.m
On line 66  ==>         feval(varargin{:});

Error in ==> C:\MATLAB6p5p1\work\jiangxiaohuai.m
On line 42  ==>     gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uicontrol Callback.

界面见附件
result后显示x的运算值，axes中显示t=(k2+k4+k5)*u*g*p的曲线
谢谢大家．

eight

原帖由 laojiang 于 2007-5-28 16:28 发表

                               
登录/注册后可看大图

我编写了一个截面，在指定位置输入数据，便在相应的位置显示结果和图象，程序如下：
function varargout = jiangxiaohuai(varargin)
% JIANGXIAOHUAI M-file for jiangxiaohuai.fig
%      JIANGXIAOHUAI, b ...

符号变量与数值型变量的转换问题，建议搜索一下版面的相关帖子

laojiang

我把＇set(handles.edit5,'string',num2str(x)); %在edit1中显示运算结果＇这句去掉后，在axes中能显示图象，x在工作界面上也有结果显示，就是不能在edit5中显示出来，应该是eight兄提出的问题吧，可是我看了很多例子，都没有找出解决的方法，望指教．谢谢您！！！

eight

原帖由 laojiang 于 2007-5-28 17:11 发表

                               
登录/注册后可看大图

我把＇set(handles.edit5,'string',num2str(x)); %在edit1中显示运算结果＇这句去掉后，在axes中能显示图象，x在工作界面上也有结果显示，就是不能在edit5中显示出来，应该是eight兄提出的问题吧，可是我看了很 ...

试试：set(handles.edit5,'string',num2str(subs(x)));

laojiang

问题果然得到解决，subs的用法在那里能查到啦，它的含义是什么呀？？以后得多向你们高手学习，在某些方面比自己看书来得快．再求教一个问题我在guid界面中axes中绘图时，我在它的属性中设定了axes的两坐标分别为x＝［０，３５］，y＝［０，１］，结果在界面运行后，axes的坐标发生了变化，变成了［０，６］和［－３，３］，谢谢你，你们无私的给人排解问题，我很感动．

eight

原帖由 laojiang 于 2007-5-28 17:54 发表

                               
登录/注册后可看大图

问题果然得到解决，subs的用法在那里能查到啦，它的含义是什么呀？？以后得多向你们高手学习，在某些方面比自己看书来得快．再求教一个问题我在guid界面中axes中绘图时，我在它的属性中设定了axes的两坐标分别为 ...

1. help subs
2. 一般不会遇到这个情况，你是使用 fig 文件方式的 GUI 设计吗？即通过 guide 面板来放置控件？你指的是 position 属性的 x、y 坐标吗

laojiang

１，我在书中查到了subs，是符号转换的的作用，但是在这里的具体作用不是很了解．
２，我是在xlim和ylim中设定的坐标的长度，即x为（０－－３５），y为（０－－２），不是在position中设置的，但是程序运行后，结果发现axes的长度改变了，不知道是怎么回事．谢谢

spano

doc axes，查看坐标轴的属性，比如说square;equal

eight

原帖由 laojiang 于 2007-5-28 20:39 发表

                               
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１，我在书中查到了subs，是符号转换的的作用，但是在这里的具体作用不是很了解．
２，我是在xlim和ylim中设定的坐标的长度，即x为（０－－３５），y为（０－－２），不是在position中设置的，但是程序运行后， ...

先画图，后设置

laojiang

我是这样做的，在xlimmode中选择manual模式，就可以人工设置x和y的上下限，但是当运行后上下限发生改变，变成了变成了［０，６］和［－３，３］
运行前后的界面见附件１和２

[ 本帖最后由 eight 于 2007-5-29 09:48 编辑 ]

eight

原帖由 laojiang 于 2007-5-29 08:37 发表

                               
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我是这样做的，在xlimmode中选择manual模式，就可以人工设置x和y的上下限，但是当运行后上下限发生改变，变成了变成了［０，６］和［－３，３］
运行前后的界面见附件１和２

不需要设置，在画图前添加一个语句就可以了：axis([0,35,0,2]);

laojiang

我尝试过了，出现的是相同的结果，
１，在属性中设置上下限
２，属性中设置和axis([0,35,0,2]);语句的同时套用
３，单独在主程序中键入axis([0,35,0,2]);
它们出现的结果是一样的，是不是我的版本太低的缘故呀，我的是６.５.１的．

eight

原帖由 laojiang 于 2007-5-29 10:56 发表

                               
登录/注册后可看大图

我尝试过了，出现的是相同的结果，
１，在属性中设置上下限
２，属性中设置和axis([0,35,0,2]);语句的同时套用
３，单独在主程序中键入axis([0,35,0,2]);
它们出现的结果是一样的，是不是我的版本太低的缘故 ...

估计与版本无关。我下午回实验室试试吧，这里没有安装 matlab

eight

代码：

1. 
   
2. x = 0:0.01:2*pi;
   
3. y = sin(x);
   
4. plot(x,y);
   
5. axis([1,2,-1,1])
   
6. hold on;
   
7. xx = 1.2:0.01:3*pi;
   
8. yy = cos(xx);
   
9. plot(xx,yy,'r');

复制代码

结果：

说明：先作图，再设置，此时坐标轴经过用户设置后能保持不变，对之后作的图也生效

laojiang

问题得到解决，谢谢eight兄，我发现在guid界面中，axes的坐标长度是有规定的，比如x＝（０－１０），y＝（０－２），那么x轴的长度为y轴的５倍长，谢谢你！！！