how apply 'int' to 'besseli' function?

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.

Answer 1

[Steven Lord]

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.

[Walter Roberson]

Note that int() requires the Symbolic Toolbox.

Also if your MATLAB version is sufficiently old, you will not have integral() either.

[Vladimir Pilyavskiy]

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]

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