# whats wrong with this code?

조회 수: 2 (최근 30일)
Nathan 2024년 4월 12일
댓글: Star Strider 2024년 4월 12일
function [drag] = aero_drag(dens,v,A)
Fd = 0.5 .* dens .* (v.^2) .* A .* 0.55.*sign(v);
drag = Fd
File: areo_drag.m Line: 1 Column: 10
Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched
delimiters.

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### 답변 (1개)

Star Strider 2024년 4월 12일
It works here.
How are you calling your ‘aero_drag’ function?
dens = rand
dens = 0.3011
v = rand
v = 0.7408
A = randn(1,5)
A = 1x5
0.2096 -1.3985 0.6751 1.1753 -0.3353
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
drag = aero_drag(dens,v,A)
drag = 1x5
0.0095 -0.0635 0.0307 0.0534 -0.0152
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
function [drag] = aero_drag(dens,v,A)
Fd = 0.5 .* dens .* (v.^2) .* A .* 0.55.*sign(v);
drag = Fd;
end
.
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Nathan 2024년 4월 12일
i copied your code and it worked some seems identical but it worked
Star Strider 2024년 4월 12일
Thank you!
It may simply have needed an end, or alternatively, needed to be put at the end of your script. (I’m not certain, because I don’t know where it was in your script, or how you called it.)

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