在Matlab中的While循环中递增数字 [英] While loop in Matlab to increment a number
问题描述
我是Matlab的新手,这应该是一个愚蠢的问题.
所以我想做的事情是在变量为true的情况下增加一个数字,在这种情况下,我将在for循环中使用该数字.让我给你举个例子.
global var1;
var1 = true;
while (var1)
var2 = 2;
var2 = var2+1
for var3=1:var2
do something...
end
end
所以var2
应该给我从2
递增的数字,直到while
循环为false
.
我已经尝试了很多,但是却无法获得.
有人可以帮助我吗?
提前谢谢.
更新
因此有两个按钮start
和stop
,而handles.h.data
是一个128x14
矩阵,该矩阵每隔0.5
秒从Emotive EEG设备生成一次,因此此变量out
每0.5秒更新一次. /p>
因此,每当我按下stop
按钮时,我都希望该循环结束.这是正确的吗?
function start_Callback(hObject, eventdata, handles)
% hObject handle to start (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global true_false;
true_false = true;
a =1;
axes(handles.eeg_dynamic)
while (true_false)
out = nan([size(handles.h.data),4]);
for k = 1:a % a to be incremented by 1
out(:,:,k) = handles.h.data + rand(1);
plot(out(:,:,k));
pause(0.5);
end
a=a+1;
end
% This converts the above out to 1D matrix and puts it in the workspace
axes(handles.eeg_final)
for eeg = 1:size(out(:,:,:),3)
eeg_output_1d = permute(out,[1 3 2]);
eeg_output_1d = reshape(eeg_output_1d,[],size(out,2),1);
plot(eeg_output_1d);
assignin('base','eeg_output_1d',eeg_output_1d)
end
% --- Executes on button press in stop.
function stop_Callback(hObject, eventdata, handles)
% hObject handle to stop (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global true_false;
true_false = false;
这两行
var2 = 2;
var2 = var2+1
与
相同var2 = 3;
也许您是想让var2 = 2;
走出循环 ?
I am new to Matlab and this should be a stupid question.
So the thing i wanted to do is to increment a number if a variable is true, in which i would be using that number to in the for loop. let me give you an example.
global var1;
var1 = true;
while (var1)
var2 = 2;
var2 = var2+1
for var3=1:var2
do something...
end
end
so var2
should give me incremented number from 2
till the while
loop is false
.
I have tried a lot but just not able to get it.
could any one help me?
thanks in advance.
Update
so there are two buttons, start
and stop
and handles.h.data
is a 128x14
matrix generated every 0.5
seconds from an Emotive EEG device, so this variable out
updates every 0.5 seconds.
So when ever i press on the stop
button i want this loop to end. Is this correct?
function start_Callback(hObject, eventdata, handles)
% hObject handle to start (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global true_false;
true_false = true;
a =1;
axes(handles.eeg_dynamic)
while (true_false)
out = nan([size(handles.h.data),4]);
for k = 1:a % a to be incremented by 1
out(:,:,k) = handles.h.data + rand(1);
plot(out(:,:,k));
pause(0.5);
end
a=a+1;
end
% This converts the above out to 1D matrix and puts it in the workspace
axes(handles.eeg_final)
for eeg = 1:size(out(:,:,:),3)
eeg_output_1d = permute(out,[1 3 2]);
eeg_output_1d = reshape(eeg_output_1d,[],size(out,2),1);
plot(eeg_output_1d);
assignin('base','eeg_output_1d',eeg_output_1d)
end
% --- Executes on button press in stop.
function stop_Callback(hObject, eventdata, handles)
% hObject handle to stop (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global true_false;
true_false = false;
These two lines
var2 = 2;
var2 = var2+1
are the same as
var2 = 3;
Perhaps you meant for var2 = 2;
to go outside the loop?
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