Error using / Arguments must be numeric, char, or logical.

When i input this code :

t=0:1:10;

y=2.718.^(-t/5)-{[2.718.^(-t/5)].*t}/5;

plot(t,y(t))

the program reclaims : Error using /

Arguments must be numeric, char, or logical.

How can i solve this please ?

Answer 1

[VBBV]

y=@(t) 2.718.^(-t/5)-(2.718.^(-t/5).*t)/5;
t=0:1:10;
plot(t,y(t))

Define the equation as anonymous function and plot

[Antônio Carvalho]

thanx

Answer 2

[Image Analyst]

You can get rid of the (t) in plot. Also get rid of the braces in the definition of y because that puts what's inside of the braces into a cell and you can't subtract a cell from a number. See the FAQ:

https://matlab.fandom.com/wiki/FAQ#What_is_a_cell_array.3F

You can also use exp instead of raising 2.718 to a power. Fixed code:

t = 0 : 10;
y = exp(-t/5) - exp(-t/5) .* t / 5;
plot(t, y, 'b-');
grid on;
xlabel('t');
ylabel('y');