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laojiang 发表于 2007-5-28 16:28

结果显示和图象显示问题

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
= 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
% eventdatareserved - 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)
% varargoutcell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdatareserved - 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)
% eventdatareserved - 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'));
switchindex
case 1
   g=16e-6;
case2
   g=64e-6;
case 3
   g=256e-6;
case4
   g=1024e-6;
case 5
   g=4096e-6;
case6
   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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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)
% eventdatareserved - 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 发表于 2007-5-28 16:42

原帖由 laojiang 于 2007-5-28 16:28 发表 http://www.chinavib.com/forum/images/common/back.gif
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 发表于 2007-5-28 17:11

回复 #2 eight 的帖子

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 发表于 2007-5-28 17:29

原帖由 laojiang 于 2007-5-28 17:11 发表 http://www.chinavib.com/forum/images/common/back.gif
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 发表于 2007-5-28 17:54

回复 #4 eight 的帖子

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 发表于 2007-5-28 18:24

原帖由 laojiang 于 2007-5-28 17:54 发表 http://www.chinavib.com/forum/images/common/back.gif
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 发表于 2007-5-28 20:39

回复 #6 eight 的帖子

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 发表于 2007-5-28 20:42

doc axes，查看坐标轴的属性，比如说square;equal

eight 发表于 2007-5-28 20:51

原帖由 laojiang 于 2007-5-28 20:39 发表 http://www.chinavib.com/forum/images/common/back.gif
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 发表于 2007-5-29 08:37

回复eight兄和spano

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 发表于 2007-5-29 09:50

原帖由 laojiang 于 2007-5-29 08:37 发表 http://www.chinavib.com/forum/images/common/back.gif
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();

laojiang 发表于 2007-5-29 10:56

回复 #11 eight 的帖子

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();语句的同时套用
３，单独在主程序中键入axis();
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 发表于 2007-5-29 11:05

原帖由 laojiang 于 2007-5-29 10:56 发表 http://www.chinavib.com/forum/images/common/back.gif
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();语句的同时套用
３，单独在主程序中键入axis();
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 发表于 2007-5-29 15:18

代码：
x = 0:0.01:2*pi;
y = sin(x);
plot(x,y);
axis()
hold on;
xx = 1.2:0.01:3*pi;
yy = cos(xx);
plot(xx,yy,'r');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 发表于 2007-5-29 16:16

回复 #14 eight 的帖子

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！！！

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