whats wrong with this code?

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.

Answer 1

[Star Strider]

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

.

[Nathan]

i copied your code and it worked some seems identical but it worked

[Star Strider]

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.)