plotting sound signal using matlab and gui - matlab

Question

when i'm running this code it gave me nothing but the following error
matlab.graphics.internal.figfile.FigFile/read>#(hObject,eventdata)untitled('pushbutton2_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback
here's my code
function varargout = untitled(varargin)
% UNTITLED MATLAB code for untitled.fig
% UNTITLED, by itself, creates a new UNTITLED or raises the existing
% singleton*.
%
% H = UNTITLED returns the handle to a new UNTITLED or the handle to
% the existing singleton*.
%
% UNTITLED('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in UNTITLED.M with the given input arguments.
%
% UNTITLED('Property','Value',...) creates a new UNTITLED or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before untitled_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to untitled_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 untitled
% Last Modified by GUIDE v2.5 16-Dec-2016 17:10:11
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', #untitled_OpeningFcn, ...
'gui_OutputFcn', #untitled_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 untitled is made visible.
function untitled_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 untitled (see VARARGIN)
% Choose default command line output for untitled
bushbutton1()
bushbutton2()
% Update handles structure
handles.output = hObject;
guidata(hObject, handles);
% UIWAIT makes untitled wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = untitled_OutputFcn(~, ~, handles)
varargout{1} = handles.output;
% --- Executes on button press in bushbutton1.
function bushbutton1_Callback(hobject,eventdata,handles)
global speech
x = audiorecorder(16000,16,1);
recordblocking(x,3);
speech = getaudiodata(x,'double');
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
axes(handles.axes1)
plot(handles.speech)
is there any suggestions, thanks.

Answer 1

You didn't save speech into the handles struct. You need to do so using guidata
function bushbutton1_Callback(hobject,eventdata,handles)
x = audiorecorder(16000,16,1);
recordblocking(x,3);
handles.speech = getaudiodata(x,'double');
% Save the updated handles struct
guidata(hobject, handles);
end
function pushbutton2_Callback(hObject, eventdata, handles)
axes(handles.axes1)
plot(handles.speech)
end
or just use speech since you've already defined it as a global variable. Note that this is less preferable since the usage of global variables can lead to many issues.
function pushbutton2_Callback(hObject, eventdata, handles)
gloabl speech
plot(speech)
end