Hello, I'm currently making a gui in solving integral using trapezoidal rule. The gui input were a = min integral limit, and b = max intergral limit. However, when I keyed in the number of subintervals, matlab gives me and mldivide error. How can I key in not as a matrix but as a 2 digit number
% function varargout = Trapezoidal_rule(varargin)
% TRAPEZOIDAL_RULE MATLAB code for Trapezoidal_rule.fig
% TRAPEZOIDAL_RULE, by itself, creates a new TRAPEZOIDAL_RULE or raises the existing
% singleton*.
%
% H = TRAPEZOIDAL_RULE returns the handle to a new TRAPEZOIDAL_RULE or the handle to
% the existing singleton*.
%% TRAPEZOIDAL_RULE('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in TRAPEZOIDAL_RULE.M with the given input arguments.
%% TRAPEZOIDAL_RULE('Property','Value',...) creates a new TRAPEZOIDAL_RULE or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before Trapezoidal_rule_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to Trapezoidal_rule_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 Trapezoidal_rule
% Last Modified by GUIDE v2.5 09-Apr-2013 23:26:20
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @Trapezoidal_rule_OpeningFcn, ... 'gui_OutputFcn', @Trapezoidal_rule_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []);if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1});endif 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 Trapezoidal_rule is made visible.
function Trapezoidal_rule_OpeningFcn(hObject, ~, 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 Trapezoidal_rule (see VARARGIN)
% Choose default command line output for Trapezoidal_rule
handles.output = hObject;% Update handles structure
guidata(hObject, handles);% UIWAIT makes Trapezoidal_rule wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = Trapezoidal_rule_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 calculate.
function calculate_Callback(hObject, eventdata, handles)% hObject handle to calculate (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)calculate = trapz(x,equation);% --- Executes on button press in reset.
function reset_Callback(hObject, eventdata, handles)% hObject handle to reset (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)function value_a_Callback(hObject, eventdata, handles)% hObject handle to value_a (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 value_a as text
% str2double(get(hObject,'String')) returns contents of value_a as a double
handles.value_a = get (hObject,'string');guidata (hObject, handles)% --- Executes during object creation, after setting all properties.
function value_a_CreateFcn(hObject, eventdata, handles)% hObject handle to value_a (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');endfunction value_b_Callback(hObject, eventdata, handles)% hObject handle to value_b (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 value_b as text
% str2double(get(hObject,'String')) returns contents of value_b as a double
handles.value_b = get (hObject, 'string');guidata (hObject, handles)% --- Executes during object creation, after setting all properties.function value_b_CreateFcn(hObject, eventdata, handles)% hObject handle to value_b (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');endfunction value_n_Callback(hObject, eventdata, handles)% hObject handle to value_n (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 value_n as text
% str2double(get(hObject,'String')) returns contents of value_n as a double
handles.value_n = get (hObject, 'string');n = handles.value_na = handles.value_ab = handles.value_bhandles.h = (b-a)/nh = handles.hhandles.x=a:h:bx=handles.xguidata (hObject, handles);% --- Executes during object creation, after setting all properties.function value_n_CreateFcn(hObject, eventdata, handles)% hObject handle to value_n (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');endfunction equation_Callback(hObject, eventdata, handles)% hObject handle to equation (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 equation as text
% str2double(get(hObject,'String')) returns contents of equation as a double
equation = get(hObject, 'string');% --- Executes during object creation, after setting all properties.function equation_CreateFcn(hObject, eventdata, handles)% hObject handle to equation (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');endfunction answer_1_Callback(hObject, eventdata, handles)% hObject handle to answer_1 (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 answer_1 as text
% str2double(get(hObject,'String')) returns contents of answer_1 as a double
answer_1 = get(calculate)% --- Executes during object creation, after setting all properties.function answer_1_CreateFcn(hObject, eventdata, handles)% hObject handle to answer_1 (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
Thank you viewing this question and I thank you for any help provided
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