matlab) what should I do more to plot this function?

    a=52.9*10^-12    

    x=0 : 900*10^-12

    y=[(4*pi*(x^2))]*[(2*(2^0.5)/(81*(15)^0.5))*((1/a)^(1.5))*((x/a)^2)*(exp(-(x/(3*a))))]^2

I just want to plot this long function. what should I do?

Answer 1

[Walter Roberson]

The syntax

x = A : B

starts at A and increments by 1, stopping at the last value <= B.

0 <= 900*10^-12 so 0 : 900*10^-12 includes 0. Then (0+1) is not <= 900*10^-12 so nothing else is included.

I suggest you see linspace(). I also suggest you read http://www.mathworks.com/help/matlab/ref/power.html

[hyunmin]

thanks! I solve it!