How to solve integral numerically in Matlab?

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Qudsiya Irum
Qudsiya Irum 2017-9-22
回答： Walter Roberson 2017-9-22
if R=integral(10*exp(-60/{T(t)*Ni(x)}*Ni(x)), integral limit, x=0 to x=10 Ni(x) is 1-D interpolation function as used in finite element method, T is function of time, shape function is function of length. How to solve integral in Matlab if using "Gauss quadrature rule" or if there some command guidance to be written in code. Please I need guidance.
Thank you
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Jan
Jan 2017-9-22
Is this integral a function of t or of x?
Did you read the documentation already?
doc integral

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回答（1 个）

Walter Roberson
Walter Roberson 2017-9-22
If your interpolation does not have continuous first derivatives (linear interpolation does not) then you need to use the waypoints parameter of integrate() to designate all of the change points as waypoints.

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