Unable to perform assignment because the left and right sides have a different number of elements.

I want to make a function tha carculates de speed of a train that accelerates uniformly en every point of the train having acceleration(a), train length (Lt) and start speed (v0) as inputs and i don t know why this error appears.

Does anyone know how to solve this?

Thanks

ERROR:Unable to perform assignment because the left and right sides have a different number of elements.

Error in VelTren (line 9)

v(i)=((v0.^2)+2*a*l).^(1/2);

function [v] = VelTren(v0,a,Lt)

l=0:0.1:Lt;
v=zeros(1,length(l));
v(1)=v0;

    for i=2:length(l)
        v(i)=((v0.^2)+2*a*l).^(1/2);
        
    end
end

Answer 1

[Kevin Holly]

VelTren(1,9.81,46)

ans = 1×461

1.0000 1.7210 2.2190 2.6241 2.9746 3.2879 3.5738 3.8385 4.0861 4.3195 4.5409 4.7521 4.9542 5.1484 5.3355 5.5163 5.6914 5.8612 6.0263 6.1869 6.3435 6.4963 6.6456 6.7916 6.9346 7.0746 7.2119 7.3467 7.4790 7.6091

You need to change l to l(i).

function [v] = VelTren(v0,a,Lt)
l=0:0.1:Lt;
v=zeros(1,length(l));
v(1)=v0;
    for i=2:length(l)
        v(i)=((v0.^2)+2*a*l(i)).^(1/2);
        
    end
end