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whats wrong with this code?

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Nathan
Nathan 2024-4-12
评论： Star Strider 2024-4-12
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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回答（1 个）

Star Strider
Star Strider 2024-4-12
Ran in:
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
.
  2 个评论
Nathan
Nathan 2024-4-12
i copied your code and it worked some seems identical but it worked
Star Strider
Star Strider 2024-4-12
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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