How to make negative degree numbers positive while maintaining degree.

Question

Kristin Aldridge 2021-10-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1569133-how-to-make-negative-degree-numbers-positive-while-maintaining-degree

编辑： Walter Roberson 2021-10-22

I'm trying to use

if avg_deg < 0, avg_deg = avg_deg+360; end

but it isn't working. I don't want to use abs because I want to rotate these negative degrees to their positive counterpart, but the line of code isn't doing anything at all.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2021-10-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1569133-how-to-make-negative-degree-numbers-positive-while-maintaining-degree#answer_813823

在 MATLAB Online 中打开

You can use logical indexing....

avg_deg = randi([-719 719], 1, 10)
avg_deg = 1×10
   149   -15  -420   453   593  -132   594   712   344   423
mask = avg_deg < 0;
new_deg_version_1 = avg_deg;
new_deg_version_1(mask) = new_deg_version_1(mask) + 360
new_deg_version_1 = 1×10
   149   345   -60   453   593   228   594   712   344   423

But I would suggest that mod() is more reliable, since it can handle angles < -360 and angles >= 360

new_deg_version_2 = mod(avg_deg, 360)
new_deg_version_2 = 1×10
   149   345   300    93   233   228   234   352   344    63

2 个评论
显示无隐藏无

Kristin Aldridge 2021-10-21

Thanks, I used lonWrapped=wrapTo360(lon) which I think is the same?

Walter Roberson 2021-10-22

编辑：Walter Roberson 2021-10-22

在 MATLAB Online 中打开

avg_deg = [randi([-719 719], 1, 5), -720, -360, 0, 360, 720]
avg_deg = 1×10
  -617  -202   -77   -35  -677  -720  -360     0   360   720
new_deg_version_2 = mod(avg_deg, 360)
new_deg_version_2 = 1×10
   103   158   283   325    43     0     0     0     0     0
new_deg_version_3 = wrapTo360(avg_deg)
new_deg_version_3 = 1×10
   103   158   283   325    43     0     0     0   360   360