Getting single answer for function with an array
显示 更早的评论
Hi there,
Im trying to plot a graph of Drag against velocity. The velocity(V) in which is stored in an array from 20 to 100 in increments of 10. however when i calculate drag (D) the code only outputs a single output for drag instead of one output for each velocity.
Any help would be appreciated ,
Thank you
>> d=1.225;
>> S=50;
>> Cd=0.03;
>> K=0.04;
>> W=50;
>> V=[20:10:100];
>> D=((0.5)*d*(V.^2)*S*Cd+(K*W^2))/((0.5*d*(V.^2)*S))
回答（1 个）
Torsten
2022-4-16
D=(0.5*d*V.^2*S*Cd+K*W^2)./(0.5*d*V.^2*S)
instead of
D=((0.5)*d*(V.^2)*S*Cd+(K*W^2))/((0.5*d*(V.^2)*S))
3 个评论
Takura Nyatsuro
2022-4-16
./ is element-wise division:
[2 4 6 8]./[2 3 4 5] % = [2/2 4/3 6/4 8/5]
/ is matrix division:
[2 4 6 8]/[2 3 4 5]
Since you already used elementwise multiplication for V, I didn't explain in detail what was the reason for the error. I thought it was only an oversight.
类别
在 帮助中心 和 File Exchange 中查找有关 MATLAB 的更多信息
2022-4-16
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
