function [t1,t2]= untitled2(img0) img=imread(img0); if size(img)>2 I=rgb2gray(img); else I=img; end [m,n]=size(I);%图像的尺寸 counts=m*n;%像素总数 count=imhist(I);%求直方图 p=count/counts;%各个像素概率 w1=cumsum(p);%累计像素概率 u=cumsum(p.*(1:256)'); u_end=u(end);%u_end是全局平均灰度 d=(w1*u_end-u).^2./(w1.*(1-w1)); [x,y]=max(d);%返回最大方差和位置 t1=(y-1)/255;%自定义所得阈值 t2=graythresh(I);%graythresh计算出的阈值 subplot(2,2,1),imshow(I);title('灰度图像'); subplot(2,2,2),imhist(I);title('灰度直方图'); subplot(2,2,3),im2bw(I,t1);title('自定义函数图像'); subplot(2,2,4),im2bw(I,t2);title('graythresh图像'); disp(['自定义函数：t1=', num2str(t1)]); disp(['OTSU算法：t2=', num2str(t2)]); end上述代码为什么输出ans能帮我看一下哪里变量没有定义

在你调用函数时，如果将函数的输出值直接输出到命令窗口中，Matlab会自动将函数的输出值赋值给变量"ans"，并输出到命令窗口中。因此，当你调用该函数时，如果直接输入函数名，则会输出变量"ans"的值，而不是函数的输出值。

为了解决这个问题，你需要在调用函数时，使用一个变量来接收函数的输出值，例如：

[t1, t2] = untitled2('C:\Users\樱桃小丸子\Pictures\Saved Pictures\背景1.png');

在上述代码中，将函数的输出值分别赋值给变量"t1"和"t2"，这样就可以避免输出变量"ans"的值。

另外，你在函数的最后几行使用了disp函数输出t1和t2的值，这样就可以在函数运行结束后，直接输出t1和t2的值，而不必再在命令窗口中查看变量"ans"的值了。如果你仍然看到了变量"ans"的值，可能是因为你在调用函数时，没有将函数的输出值赋值给任何变量，或者是在函数中有其他地方使用了未定义的变量。

相关问题

function varargout = untitled1(varargin)

这是一个 MATLAB 代码文件的模板，用于定义一个函数。函数名称为 "untitled1"，输入参数可以是任意数量和类型的，输出参数也可以是任意数量和类型的。函数体需要根据具体的需求进行修改。

以下是模板代码：

function varargout = untitled1(varargin)
% UNTITLED1 MATLAB code for untitled1.fig
% UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing
% singleton*.
%
% H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to
% the existing singleton*.
%
% UNTITLED1('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in UNTITLED1.M with the given input arguments.
%
% UNTITLED1('Property','Value',...) creates a new UNTITLED1 or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before untitled1_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to untitled1_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 untitled1

% Last Modified by GUIDE v2.5 03-Jul-2021 19:01:56

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @untitled1_OpeningFcn, ...
'gui_OutputFcn', @untitled1_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 untitled1 is made visible.
function untitled1_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 untitled1 (see VARARGIN)

% Choose default command line output for untitled1
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes untitled1 wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = untitled1_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)

% Hint: get(hObject,'Value') returns toggle state of pushbutton1

% --- 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 = cellstr(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 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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

% --- Executes on button press in checkbox1.
function checkbox1_Callback(hObject, eventdata, handles)
% hObject handle to checkbox1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of checkbox1

% --- Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton1

% --- Executes on button press in togglebutton1.
function togglebutton1_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of togglebutton1

% --- 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)

% Hint: get(hObject,'Value') returns position of slider

% --- 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.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor',[.9 .9 .9]);
end

% --- Executes on key press with focus on pushbutton1 and none of its controls.
function pushbutton1_KeyPressFcn(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata structure with the following fields (see MATLAB.UI.CONTROL.UICONTROL)
% EventName: string 'KeyPress'
% Indices: row vector
% Key: character vector containing the key(s) that was pressed
% Modifier: cell array containing a modifier key string of 'alt', 'ctrl',
% or 'shift', if it was pressed or {} if it was not
% handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of pushbutton1

解释这段代码function varargout = untitled(varargin)

这段代码是一个 MATLAB 函数的框架，函数名为 `untitled`。它接受一个变量输入参数 `varargin`，并返回一个变量输出参数 `varargout`。`varargin` 是一个特殊的 MATLAB 变量，它允许函数接受任意数量的输入参数。同样，`varargout` 也是一个特殊的变量，它允许函数返回任意数量的输出参数。在这段代码中，函数的具体实现逻辑没有给出，因此无法确定函数的功能和目的。