How can I plot integral of this equation?

Question

E kara 2021-7-29

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https://ww2.mathworks.cn/matlabcentral/answers/888611-how-can-i-plot-integral-of-this-equation

编辑： E kara 2021-11-19

I couldn't manage to plot this equation over time.

I wrote the formula for integral, but these are scalar, but i had to wrote '.*' instead of *

I should have a decreasing trend, but there is no plot. Iam new in Matlab, could you please let me know where is the my mistakes?

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Answer 1

Star Strider 2021-7-29

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https://ww2.mathworks.cn/matlabcentral/answers/888611-how-can-i-plot-integral-of-this-equation#answer_756674

Try something like this —

% clc;
figure('color','white');
while(1)
sigma.phi=input('Enter 0.1 in a.u.: ');
mu=input('Enter 2 in mm-1: ');
n=input('number of evicted electrons: ');
t=0:300;
fun=@(x,t)(n).*(exp(-((mu).*x))).*(exp(-((sigma.phi).*t.*(exp(-(mu).*x)))));
for k = 1:numel(t)
    Q(k)=integral(@(x)fun(x,t(k)),0,1);
end
 
    plot(t,Q);
    xlabel('Time / s ');
    title('Signal');
    ylabel('Intensity');
    hold all;
    ch= input('Press 1 to continue and 0 to exit: ')
if ch == 0
    break;
end
end