MATLAB is missing one essential rounding function!
显示 更早的评论
Okay, besides the normal rounding function we all know and love ("round"; rounding towards the nearest integer), we have the three special rounding functions: ceil, floor, and fix. We can use them to round towards positive infinity, negative infinity, and towards zero, respectively. But there is no function for rounding AWAY FROM ZERO.
Come on, guys. Let's complete the group of functions and get that last one defined and implemented. I need it right now.
采纳的回答
Daniel Shub
2011-10-26
ceilfix = @(x)ceil(abs(x)).*sign(x);
or some such nonsense name.
ceilfix(-2:0.2:2)
更多回答（3 个）
Sean de Wolski
2011-10-26
function out = rafz(in)
%out = rafz(in), round away from zero
%SCd 10/26/2011
%
out = max(abs(ceil(in)),abs(floor(in))).*sign(in);
end
Now you have it! I couldn't come up with a better title, unfortunately.
Jim Luschen
2011-10-26
0 个投票
3 个评论
Sean de Wolski
2011-10-26
submit an enhancement request.
Daniel Shub
2011-10-26
But who is going to get their answer accepted? Sean was first and had a good name. I was second and had a crappy name, but potentially a better algorithm.
Make a request: http://www.mathworks.com/support/service_request/login_servicerequests.html?targetURL=/support/service_requests/contact_support.do
Daniel Shub
2011-10-26
stop beating me Sean.
Tom Smits
2013-3-14
0 个投票
I was surprised as well that there was no 'round away from zero' function in MATLAB but eventually I figured that the solution is really simple, so I thought I'd share my findings:
ceilfix(x) = sign(x)+fix(x)
cheers
2 个评论
Walter Roberson
2013-3-14
To confirm: is that addition rather than multiplication ?
Teja Muppirala
2013-3-15
This won't work for nonzero integers:
ceilfix(1.0) = sign(1.0) + fix(1.0) = 1.0 + 1.0 = 2
类别
在 帮助中心 和 File Exchange 中查找有关 Logical 的更多信息
2011-10-26
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
