Question

我想用GUIDE Matlab创建一个图形界面，显示传递函数的不同响应：step，impulse，bode，nyquist和nichols响应。它适用于步骤和冲动响应，但是使用nyquist，bode和nichols它可以工作，我应该添加＆＃39;挤压＆＃39;到了剧情＆＃39;功能，但它不是正确的响应！当我尝试使用情节时，这是错误：

???使用==＆gt;时出错plot数据的维度不得超过2维
这是LTI。图文件以下代码是.m文件的内容

function varargout = LTI(varargin)
% LTI M-file for LTI.fig
%      LTI, by itself, creates a new LTI or raises the existing
%      singleton*.
%
%      H = LTI returns the handle to a new LTI or the handle to
%      the existing singleton*.
%
%      LTI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in LTI.M with the given input arguments.
%
%      LTI('Property','Value',...) creates a new LTI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before LTI_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to LTI_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 LTI

% Last Modified by GUIDE v2.5 24-Nov-2014 10:41:38

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

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = LTI_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;



function numerateur_Callback(hObject, eventdata, handles)
% hObject    handle to numerateur (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 numerateur as text
%        str2double(get(hObject,'String')) returns contents of numerateur as a double


% --- Executes during object creation, after setting all properties.
function numerateur_CreateFcn(hObject, eventdata, handles)
% hObject    handle to numerateur (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function denumerateur_Callback(hObject, eventdata, handles)
% hObject    handle to denumerateur (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 denumerateur as text
%        str2double(get(hObject,'String')) returns contents of denumerateur as a double


% --- Executes during object creation, after setting all properties.
function denumerateur_CreateFcn(hObject, eventdata, handles)
% hObject    handle to denumerateur (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on button press in rep_indic.
function rep_indic_Callback(hObject, eventdata, handles)
% hObject    handle to rep_indic (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
num= str2num(get(handles.numerateur,'String'));
denum = str2num(get(handles.denumerateur,'String'));
G=tf([num],[denum]);
axes(handles.figure)
plot(step(G))
grid on


% --- Executes on button press in lieu_bode.
function lieu_bode_Callback(hObject, eventdata, handles)
% hObject    handle to lieu_bode (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
num= str2num(get(handles.numerateur,'String'));
denum = str2num(get(handles.denumerateur,'String'));
G=tf([num],[denum]);
axes(handles.figure)
plot(squeeze(bode(G)))
grid on

% --- Executes on button press in rep_impuls.
function rep_impuls_Callback(hObject, eventdata, handles)
% hObject    handle to rep_impuls (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
num= str2num(get(handles.numerateur,'String'));
denum = str2num(get(handles.denumerateur,'String'));
G=tf([num],[denum]);
axes(handles.figure)
plot(impulse(G))
grid on

% --- Executes on button press in lieu_nyquist.
function lieu_nyquist_Callback(hObject, eventdata, handles)
% hObject    handle to lieu_nyquist (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
num= str2num(get(handles.numerateur,'String'));
denum = str2num(get(handles.denumerateur,'String'));
G=tf([num],[denum]);
axes(handles.figure)
plot(s(nyquist(G)))
grid on

% --- Executes on button press in lieu_nichols.
function lieu_nichols_Callback(hObject, eventdata, handles)
% hObject    handle to lieu_nichols (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
num= str2num(get(handles.numerateur,'String'));
denum = str2num(get(handles.denumerateur,'String'));
G=tf([num],[denum]);
axes(handles.figure)
plot(squeeze(nichols(G)))
grid on

Answer 1

您没有提供* .fig文件来使用您的代码，但我怀疑我知道问题所在：bode，nyquist和nichols会自动生成图表，您无需调用plot函数。检查文档以了解调用这些函数的正确方法。在GUI中，替换：

plot(squeeze(bode(G))) bode(G)
plot(s(nyquist(G))) [原文如此] nyquist(G)
plot(squeeze(nichols(G))) nichols(G)

根据评论编辑

我认为您需要做的就是

num= str2num(get(handles.numerateur,'String'));
denum = str2num(get(handles.denumerateur,'String'));
G=tf([num],[denum]);
axes(handles.figure)
step(G)
grid on

同样适用于bode，nyquist，nichols和impulse，即只需在图中创建一组轴，并且图表将显示在那些轴默认为。

在gui matlab中绘制bode，nyquist和nichols响应的错误

1 个答案: