I need help with an error I get

I have to write a bit of code for an assignment and I keep getting an error and I dont know how to solve it.

I have to determine the position, velocity and acceleration. funcao_forca is a function of a force that is defined in another script. It keeps telling me that F is not recognized. How do I go about this?

function [posicao, velocidade, aceleracao] = atleta(t, f, M)
    f = funcao_forca(t,F);
    dt = 1;
    t1 = [0:dt:t];
    aceleracao = zeros(size(t1));
    aceleracao = f/M;


    velocidade = zeros(size(t1));
    for i = 2:length(t1)
        velocidade(i) = velocidade(i-1) + aceleracao(i) * (t1(i) - t1(i-1));
    end
   
    posicao = zeros(size(t1));
    for i = 2:length(t1)
        posicao(i) = posicao(i-1) + velocidade(i-1) + 0.5 * aceleracao(i) * (t1(i) - t1(i-1))^2;
    end
end

Answer 1

[Stephen23]

Perhaps the input argument should be F (not f):

function [posicao, velocidade, aceleracao] = atleta(t, F, M)

Answer 2

[Torsten]

Define F before you call "funcao_forca". It's not set in your code.

Maybe you mean

F = funcao_forca(t,f);

because f is a given input to your function.

Answer 3

[Venkat Siddarth Reddy]

Hi Nathanael,

Variables in MATLAB are case-sensitive.In the first line of function definition, "F" has been used which isn't declared or defined before. I think you have accidentally typed it for the variable "f".

I hope it helps!