problem with if condition
显示 更早的评论
hi, i have this problem with matlab. This is my m-file, but it doesnt work.
clear all
t=0:0.1:1;
k=length(t);
a=0;
for i=1:k
if a==0.8
disp('hi')
end
a=a+0.1
end
If i use this one
t=0:1:10;
k=length(t);
a=0;
for i=1:k
if a==8
disp('hi')
end
a=a+1
end
this one works well. The difference between first and second case is only that some variables are increased 10times. Please help. thank you
采纳的回答
Aldin
2012-3-9
Solution:
Here, try this algorithm:
clear all
t=0:0.1:1;
k=length(t);
a=0;
for i=1:k
b = num2str(a);
if strcmp(b,'0.8');
disp('hi')
end
a=a+0.1;
end
5 个评论
milan pepa
2012-3-9
Aldin
2012-3-9
I don't know. Maybe cause 0.8 is not equal to 0.8000 by using for loop.
Are you from Yugoslavia?:) See Walter Roberson link:
http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F
Aldin
2012-3-9
Accept Answer if i was helpful.
Walter Roberson
2012-3-9
Using the string solution is not recommended. Instead use a tolerance on the comparison.
milan pepa
2012-3-9
更多回答（1 个）
G A
2012-3-9
0 个投票
2 个评论
Walter Roberson
2012-3-9
http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F
milan pepa
2012-3-9
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2012-3-9
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