信号数据导入后出错
求助: 想实现点击界面按钮时就跳出对话框导入数据,并将数据绘在axle上,程序如下:
function pushbutton8_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton8 (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
=uigetfile('*.*','Select a single:');
fid=fopen(fileName,'r');
SS = fread(fid,inf,'single');
sigl=1000;
fs=10000;
beg=8;
x=1.0*30*ss(beg:sigl+beg-1);
t=1/fs:1/fs:sigl/fs;
axes(handles.axes3);
plot(t,x);xlabel('time/s');ylabel('Aceceration/m/s^2');
但老是出错,如下:
??? Undefined function or variable 'fileName'.
Error in ==> test2>pushbutton8_Callback at 101
fid=fopen(fileName,'r');
Error in ==> gui_mainfcn at 75
feval(varargin{:});
Error in ==> test2 at 42
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback.
请哪位帮我看看,谢谢!
[ 本帖最后由 eight 于 2007-7-16 11:23 编辑 ] fid=fopen(fileName,'r');改成fid=fopen(FileName,'r');试试看:@) 改了下,那个位置没再出错,
谢谢!
可是又有新的问题了,请帮我再看看:
??? Error using ==> fread
Invalid file identifier -1.
Error in ==> test2>pushbutton8_Callback at 103
SS = fread(fid,inf,'single');
Error in ==> gui_mainfcn at 75
feval(varargin{:});
Error in ==> test2 at 42
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback. ??? Error using ==> fread
Invalid file identifier -1.
无效的文件标识，自己查看以下read的用法，help read
学会独立解决问题很重要，确信自己看了帮助文档还解决不了的再来讨论了，比如你的第一个错误：未定义的变量，是因为你把FileName写成fileName一个字母只差。多思考，找原因才会有进步！建议看一下振动论坛FAQ(1.0版)之Matlab---pdf版
http://forum.vibunion.com/forum/thread-12695-1-1.html非常不错的
[ 本帖最后由 花如月 于 2007-7-15 17:10 编辑 ] 问题解决了.
谢谢指导!
回复 #5 orchis_2005 的帖子
呵呵，提个建议。许多版友都是问题解决了一走了之，既然解决了就把你的问题原因和解决办法那来分享一下。对其他的版友或许有用处，不然这个帖子还有什么价值呢？别人看了也不会有什么收获 function pushbutton8_Callback(hObject, eventdata, handles)% hObject handle to pushbutton8 (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
=uigetfile('*.*','Select a single:');
fid=fopen(fileName,'r');
SS = fread(fid,inf,'single');
sigl=1000;
fs=10000;
beg=8;
x=1.0*30*ss(beg:sigl+beg-1);
t=1/fs:1/fs:sigl/fs;
axes(handles.axes3);
plot(t,x);xlabel('time/s');ylabel('Aceceration/m/s^2');
也是一个大小写的问题,将其中的SS,fileName改为了ss,FileName.
就好了!
好象MATLAB中是不区分大小写的,为什么就不清楚,!
[ 本帖最后由 orchis_2005 于 2007-7-16 11:06 编辑 ] 原帖由 orchis_2005 于 2007-7-16 11:03 发表 http://www.chinavib.com/forum/images/common/back.gif
function pushbutton8_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton8 (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles struct ...
matlab 是区分大小写的
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