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

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hyunmin 2014-3-12

关闭： MATLAB Answer Bot 2021-8-20

    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?

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Walter Roberson 2014-3-12

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 2014-3-12

thanks! I solve it!

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