how to write this integration please

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MAHMOUD ALZIOUD
MAHMOUD ALZIOUD 2018-10-19
评论： MAHMOUD ALZIOUD 2018-10-19
Dear All, I attached an image with a formula that I need to write in matlab but I do not know the right syntax, x ranges from zero to infinity, how can I write this integration please?
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madhan ravi
madhan ravi 2018-10-19
Just try what you know and paste the code here to debug, seems to be an easy task.
MAHMOUD ALZIOUD
MAHMOUD ALZIOUD 2018-10-19
编辑：MAHMOUD ALZIOUD 2018-10-19
i tried this but it is no working!
x=(0:100); %this is an example
fun=(0.00001*x.^4-0.0003*x.^3+0.0093*x.^2-0.0843*x+0.1721)*(0.154*exp.(0.089*((x-9.911).^2))); %the first part of the integration
q = integral(fun,2,50) % a required zone

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madhan ravi
madhan ravi 2018-10-19
编辑：madhan ravi 2018-10-19
syms x %requires symbolic toolbox
fun=(0.00001*x.^4-0.0003*x.^3+0.0093*x.^2-0.0843*x+0.1721)*(0.154*exp(0.089*((x-9.911).^2)));
int(fun,x,2,50) %erfi constant arises because of exponential function
double(int(fun,x,2,50))
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