f

#### Error: "identifier" expected, "(" found.

I am trying to do an integration for  the value of gradPE which has the following equation:

So I wrote the below code:

For p = Mcount+1:N1
M(:,p) = A*M(:,p-1)+B;
F = @(Gy)(Gamma*pi*2*Gy(p-2));
gradPE = quad(F, 0, 300);                            % 0 and 300 are my limits
end;

Where
Gamma = 4256;
Mcount = 1;
N1 = 1020;
%Gy= are values located in an excel sheet {up to 1020 values for Gy}.

I even tried to add another anonymous function to F:
F = F = @(p) (quad(@(Gy) (Gamma * pi * 2 * Gy(p-2)), 0, 300));

However, I am getting  this message:

"identifier" expected, "(" found.

I also tried to establish a function ( m-file) with this content:

function gradrot = myfun(Gamma, Gy, p)

and then I tried to call it on the main programme by having this line:

but the programme kept asking me about the values of Gamma, p and Gy and I get these messages:

Error in ==> C:\Documents and Settings\AA231\My Documents\Simulation\myfun.m
On line 3  ==> gradrot = Gamma*pi*2*Gy(p-2);
On line 59  ==> y = feval(f, x, varargin{:});

Error in ==> C:\Documents and Settings\AA231\My Documents\Simulation\Bloch_sim_RF_RO_TR.m
On line 123  ==>

In addition, it seems that the function does not accept value of Gy as they are located in an excel file.

I am using matlab version: 6.5.1

 0
1/24/2012 4:19:09 PM
comp.soft-sys.matlab 211266 articles. 19 followers. lunamoonmoon (258) is leader.

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"Azza Ahmed" <azza_rahim@yahoo.com> wrote in message
news:jfmllt$r96$1@newscl01ah.mathworks.com...
> I am trying to do an integration for  the value of gradPE which has the
> following equation:
>
>
> So I wrote the below code:
>
> For p = Mcount+1:N1
> M(:,p) = A*M(:,p-1)+B;
> F = @(Gy)(Gamma*pi*2*Gy(p-2));

*snip*

From later on in your message:

> I am using matlab version: 6.5.1

Anonymous functions [the @(variable) expression syntax you're using to
define F] were introduced in MATLAB 7.0 (release R14) and will not work in
earlier versions.

http://www.mathworks.com/help/techdoc/rn/f8-1009921.html#f8-1011687

*snip*

> I also tried to establish a function ( m-file) with this content:
>
> function gradrot = myfun(Gamma, Gy, p)
>
>
> and then I tried to call it on the main programme by having this line:
>

This will call myfun with one vector as an input argument which will be
treated as Gamma. Gy and p will not be defined in this situation.

> but the programme kept asking me about the values of Gamma, p and Gy and I
> get these messages:
>
> Error in ==> C:\Documents and Settings\AA231\My
> Documents\Simulation\myfun.m
> On line 3  ==> gradrot = Gamma*pi*2*Gy(p-2);
> On line 59  ==> y = feval(f, x, varargin{:});
>
> Error in ==> C:\Documents and Settings\AA231\My
> Documents\Simulation\Bloch_sim_RF_RO_TR.m
> In addition, it seems that the function does not accept value of Gy as
> they are located in an excel file.
>

The help text for QUAD explains, if I remember correctly, how to pass
additional inputs into the integrand function you specify as the first input
argument.

--
Steve Lord
slord@mathworks.com
http://www.mathworks.com


 0
slord (13686)
1/24/2012 6:08:24 PM

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"mailutil transfer" spews "Permission denied" errors
I'm intending to use mailutil' from the IMAP Toolkit to copy several thousand IMAP mailboxes from one Cyrus server to another. In my tests, mailutil transfer' works, but it generates a stream of Permission denied' errors. I assume these occur because the source folders are opened read-only, but the server is attempting to set flags there. Is there a way to prevent the attempt, or at least to suppress the errors? -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- On Wed, 27 Jan 2005, Gary Mills wrote: > I'm intending to use mailutil' from the IMAP Toolkit to copy > several thousand IMAP mailboxes from one Cyrus server to another. > In my tests, mailutil transfer' works, but it generates a stream > of Permission denied' errors. I assume these occur because the > source folders are opened read-only, but the server is attempting > to set flags there. Is there a way to prevent the attempt, or at > least to suppress the errors? "Permission denied" is coming from the server. "mailutil transfer" doesn't attempt to set any flags in the source mailboxes. I suggest that you use the -debug and -verbose flags to find out why the server is saying "Permission denied". It may not, in fact, actually be copying any mailboxes. -- Mark -- http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para ...

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