why do i get the error: matrix dimensions must agree ??

this is what I'm trying to plot

x=linspace(0,100,100);

a=5;

y=1/(abs(a*x)+1);

figure

plot(x,y)

how do I fix this error?

Answer 1

[Mischa Kim]

Maria, use

 y = 1./(abs(a*x) + 1);

instead. Notice the dot right after the "1". This so-called elementwise division is necessary because x is a vector. See the documentation for more detail.