if statement didn't executed in a loop
조회 수: 1 (최근 30일)
이전 댓글 표시
Hi all, I have problem on the if statement that inside can't be executed which makes other operations in the code cannot be run. My code is as follow, the problems is occurred at the "if isequal(time(i),off_tt)" parts where the variables 'k' didn't increment.
k = 0; on_t = 2;off_t = 2;
for i=1:length(time)
on_tt = (on_t*(k+1))+(off_t*k)
off_tt = (on_t*(k+1))+(off_t*(k+1))
if(time(i) ~= off_tt)
if (on_t == 0)
ref_speed_left = [ref_speed_left, 0];
ref_speed_right = [ref_speed_right, 0];
elseif (off_t == 0)
ref_speed_left = [ref_speed_left, ref_speedR];
ref_speed_right = [ref_speed_right, ref_speedL];
elseif (time(i) < on_tt) %ans == 0
ref_speed_left = [ref_speed_left, ref_speedR];
ref_speed_right = [ref_speed_right, ref_speedL];
elseif (time(i)>= on_tt && time(i) < off_tt+1)
if isequal(time(i),off_tt) %problems at this if statement
k=k+1; %k didn't increment when it
end %met the requirement
ref_speed_left = [ref_speed_left, 0]
ref_speed_right = [ref_speed_right, 0]
end
end
end
May I know any solutions for this, your helps is much appreciate. Thanks you.
댓글 수: 2
Azzi Abdelmalek
2012년 12월 13일
Can you post values of ref_speedR and others variables, to allow testing your code
답변 (3개)
Ilham Hardy
2012년 12월 13일
for i=1:length(time)
k=i %correction
on_tt = (on_t*(k+1))+(off_t*k)
off_tt = (on_t*(k+1))+(off_t*(k+1))
You declare k=0, therefore k is 0.
Azzi Abdelmalek
2012년 12월 13일
편집: Azzi Abdelmalek
2012년 12월 13일
Are you sur the condition if isequal(time(i),off_tt) is true? I tested your code, the condition is true only for i=80
댓글 수: 8
Roger Stafford
2012년 12월 13일
Shawn, look at the third line from the beginning of the for-loop:
if(time(i) ~= off_tt)
It is an outer condition that must be satisfied if you are to enter the if-elseif-elseif-end sequence. This means you cannot reach the
if isequal(time(i),off_tt)
test with equal values of time(i) and off_tt. Hence the 'isequal' test will always be false and k can never be incremented.
I am curious as to why you used 'isequal' at that point. It is intended for testing equality between entire arrays and suggests that you may have meant something else in your code here.
Roger Stafford
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Loops and Conditional Statements에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!