i want to solve definite integral with variable limits . can i apply trapezoidal rule for the same?

t0 = Id/(G0*(Vg-Vt-Id*Rs))
t1 = Id/(G0*(Vg-Vt-Vd+Id*Rd))
r = integral(@(t)1./(t.^2.*log(1-t)),t0,t1);
Id=A/r
where,
G0 = 0.132;
Vg = 0;
Vt = -.485;
Rs = 0.023;
Rd = 0.022;
Id = .003

[John D'Errico]

I fixed your code to be readable. I don't think you have the hang of it yet.

https://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup#answer_18099

Answer 1

[John D'Errico]

Can you generate a set of values for t between t0 and t1? Yes. Use linspace.

Can you evaluate that function at those points? Why not?

t = linspace(t0,t1,100);
fun = @(t)1./(t.^2.*log(1-t));
trapz(t,fun(t))

Your code is incomplete, since it fails to define Vd. So I cannot run your code to show that it works.

[neetika sharma]

Thank you for your prompt reply. Here the vd is variable between 0-0.7.and graph to be plotted between vd and id

[neetika sharma]

sir I am unable to run the above problem and waiting for for response. thankyou

[John D'Errico]

You cannot put a loop around that, varying the value of Vd, and plot the result?

Either store the intermediate results, and plot it all at the end of the loop, or plot each point one at a time, and use "hold on" to force each new point on the plot to be added to the existing plot.

[neetika sharma]

Sir can you plz tell the correct method to solve the above problem in Matlab with the required parameter