I need help with an integral

Hi guys,

I want to have the following integral in my equation: where 0 is the beginning and t=120 is the ending of the integral, ∫x*(1-e^t), where t is time in seconds.

 ytot = 60 * ( 80*22 + 29.7*11 + integral(x*(1-exp(120))))

I hope you understand what I mean,

thanks for your help

[Roger Stafford]

Which variable are you integrating with respect to, x or t? It makes a lot of difference which one you mean.

[Star Strider]

Is ‘x’ a function of ‘t’ = ‘x(t)’?

[Mo_B]

with respect to x

no x is not a function of t

Answer 1

[Star Strider]

I’m not certain what you want to do.

Try this:

t = 0:120;
ytot = 60 * ( 80*22 + 29.7*11 + integral(@(x)x*(1-exp(t)), min(t), max(t), 'ArrayValued',1));

[Mo_B]

yeah I know... I don't know how to say it

it looks way better than what I got. Thanks

[Star Strider]

My pleasure.

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