MATLAB: How to write a function

functionmatlab functionxlswrite

Please anyone can help me write this following function in matlab

The syntax for declaring a function in MATLAB is: function [y1,...,yN] = myfun(x1,...,xM)

In your case, the function defintion would be:

function v = func_name(m, g, k, t, r)
    v = ((m*g)/k)^0.5 * (1 - exp(-t/r))./(1+exp(-t/r));
end

You might find the cumprod (link) function helpful.

K = 10;
r = .1;
t = 0:1:100;
solution1 = @(t,y) K .^ (1 - (exp(-t*r)));
plot(t,(K.^(1 - (exp(t*r*-1)))), '-b');