function handles

2012 5 30
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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?

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Oleg Komarov
Oleg Komarov 2012-5-30
It is expected to return the anonymous function because 'function ns()' just defines the function but does not execute the operations.
Lizan
Lizan 2012-5-30
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
Lizan 2012-5-30
How do I make it so it execute the operation?
Lizan
Lizan 2012-5-30
Never mind, solved it. Thanks...!

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 采纳的回答

Oleg Komarov
Oleg Komarov 2012-5-30

1 个投票

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

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