function handles

Hi,

I want to create a function that calculates a equation, say for example

    function [n] = ns(dBcalc,wave, zL)   
    n = @(dBcalc,wave,zL) log(10^(dBcalc/10))/((4*pi*zL)/wave);
    end

but when I try to call this by ns(14,765e-9,e-2) it does not work. I get error saying I get to many output arguments or calling the function it simply gives back the function (i.e. it prints the function n ) not the value.

I tried to also removed the @(dBcalc,wave,zL) but still I get errors. I tried some basic equation and that works but not this. Not sure where the mistake comes from?

[Oleg Komarov]

It is expected to return the anonymous function because 'function ns()' just defines the function but does not execute the operations.

[Lizan]

Sorry I accidentally wrote wrong: you call the function with for example ns(-32.1,785e-9,1e-2) but it still does not work when I place thus code in a function .m file. I would like to use eq. many times so I want to create a .m file that I call when calculating.

I get,

>> ns(-32.1,785e-9,1e-2)

n =

@(dBcalc,wave,zL)log(10^(dBcalc/10))/((4*pi*zL)/wave)

ans =

@(dBcalc,wave,zL)log(10^(dBcalc/10))/((4*pi*zL)/wave)

[Lizan]

How do I make it so it execute the operation?

[Lizan]

Never mind, solved it. Thanks...!

Answer 1

[Oleg Komarov]

In a script define:

ns =  @(dBcalc,wave,zL) log(10^(dBcalc/10))/((4*pi*zL)/wave)
ns(14,765e-9,1e-2)

Note the 1e-2.

Alternatively:

function n = ns(dBcalc,wave, zL)   
n = log(10^(dBcalc/10))/((4*pi*zL)/wave);
end