how apply 'int' to 'besseli' function?

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Vladimir Pilyavskiy
评论： Vladimir Pilyavskiy 2015-8-20
Dear all,
Can you help me?
I've next listing program:
ezplot((int(heaviside(t)*rectangularPulse(t/(2*T*(1+(alpha/pi)^2)^.5))*besseli(0,alpha*(1-(t/(m*T))^2)^.5))))
but it's not work. I see error 'Undefined function 'int' for input arguments of type 'double''. After some time I'm understood, the problem with function 'Besseli', the 'int' not identify it's function. Maybe someone knows how correct this error.
I will be grateful for help.

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回答（1 个）

Steven Lord
Steven Lord 2015-8-20
Use INT for symbolic integration of a symbolic expression.
Use INTEGRAL for numeric integration of a function.
Use TRAPZ for integration of a set of data representing a function.
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Vladimir Pilyavskiy
Vladimir Pilyavskiy 2015-8-20
thank for your time and answer!
'integrate' and 'trapz' I can't apply because result to amount to digit. My interest is graph, for example,
syms t;
ezplot(int(2*t))
only for 'besseli' function.
Vladimir Pilyavskiy
Vladimir Pilyavskiy 2015-8-20
Dear Walter, I'm studied it's question. version of matlab - 2015a . And int() with besselj() all right but not besseli(). I'm not understand

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