problem in return code
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Hi, I worked a program to my final project in university; but there a problem in my m file... I need to return to start of my program in one case, but i can't... my program is:
function out = firstecg(x)
a=imread(x);
b=imread('normal.png');
a=rgb2gray(a);
b=rgb2gray(b);
a=im2bw(a);
b=im2bw(b);
%per diff between a and b
w=0;
const=size(a);
row=const(1);
column=const(2);
constant=row*column;
for i=1:row
for j=1:column
y=xor(a(i,j),b(i,j));
if y~=0
w=w+1;
end
end
end
perab=w/constant;
perab;
perno1=0.0023;
perno2=0.0040;
if ((0.0005>= perab)& (perab>= 0))
disp('no problem')
return %my problem is here
else
.
.
.
end %end of my program
when I run the program and in a case of return ... the result is just "no problem" , I need to return to a start of function but i can't, "the Matlab is not applied return in any case and that is a problem"
please help my
采纳的回答
Babak
2012-9-26
1 个投票
"return" command, ends the execution of the code.
"return" does not mean that the code is going to start from the beginning of the function and start running it again and again....
3 个评论
Tariq Nazzal
2012-9-27
Babak
2012-9-27
Change that block of your code to this and see if it works:
if ((0.0005>= perab)& (perab>= 0))
disp('no problem')
% Here is where you need to call this function again
% You need to set the input and output arguments of the next
% line depending on your case
out = firstecg(x)
else
Tariq Nazzal
2012-9-27
更多回答（1 个）
Jan
2012-9-26
At first I suggest to simplify the computations:
% per diff between a and b
perab = sum(xor(a(:), b(:)) ~= 0) / numel(a);
3 个评论
Tariq Nazzal
2012-9-27
Jan
2012-9-27
Well, I do not have any clue, why you use "return", when you want a loop.
perab = 0;
while 0 <= perab & perab <= 0.0005
... Her is your program
end
But what do you expect? You read in the same picture files and get the same results in each iteration. Therefore it is not clear, what you want to achieve.
Tariq Nazzal
2012-9-27
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2012-9-26
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