one case can not be initiatated when plotting using switch-case
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when running the following code, case n=0.6 can not be implemented.
for n=0.2:0.2:0.8
switch n
case 0.2
h1=plot(1:3,sin(1:3)+n,'-.xr');
case 0.4
h2=plot(1:3,sin(1:3)+n,'-.xg');
case 0.6
h3=plot(1:3,sin(1:3)+n,'-.xk');
case 0.8
h4=plot(1:3,sin(1:3)+n,'-.xb');
end
hold on;
end
however, when I change the range of n from 0.2:0:2:0.8 to 1:4, everthing is Ok! I dont know why ,if anyone can help explain, thanks a lot!
for n=1:4
switch n
case 1
h1=plot(1:3,sin(1:3)+n);
case 2
h2=plot(1:3,sin(1:3)+n);
case 3
h3=plot(1:3,sin(1:3)+n);
case 4
h4=plot(1:3,sin(1:3)+n);
end
hold on;
end
legend('1','2','3','4')
0 个评论
采纳的回答
per isakson
2012-5-19
!!! floating point arithmetic suffers from rounding errors !!!
Try: format hex
On my system your example works, but
for 0.0 : 0.3 : 1
does not
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