Why unbiased integral result in matlab differ from actual value?

which type solver is appropriate for matlab integration?

[Walter Roberson]

What do you mean by "unbiased integral" in this situation? About the only thing I can see that might be related to that is a paper on "Feynman's Integral is About Mutually Unbiased Bases"

[Rik]

@LMBSRT, why did you flag this as not appropriate?

Answer 1

[Star Strider]

It depends on what you’re doing and what your objective is. To do symbolic integration use the Symbolic Math Toolbox int function, for numeric functions the integral function, and for data vectors or matrices, trapz. These are for the current (and recent) MATLAB releases, they go by other names in older releases.

EDIT — Corrected typographical error.

[Birhan Gezahegn]

yes , it is ok for the above cases. but i am using an integrator block in simulation. Why the output ( integrator block) is very small, almost zero. For example,a sinusoidal signal with some gain k>1 supply to integrator block. Is it necessary to multiply the output with gain after integrating the signal?

[Walter Roberson]

If the input to the integrator has already been multiplied by the gain, then do not multiply the output by the gain.