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From: Brandon on 3 Dec 2009 18:50
I have written the following code and I am trying to make a movie, but I receive the error ??? Subscript indices must either be real positive integers or logicals.
Why does this happen?

Error in ==> P4_2 at 14
M(t)=getframe;

kappa = 1*10^-12; %mm^2/s
Ts = 86400; %temperature fluctuation in section
To = 20; %initial temperature in celsius
deltaT = 5; %change in temperature in celcius
t = 0;
omega = 2*pi/Ts;
z = 0:150;
alpha = sqrt(omega/(2*kappa));

for t=0:1:100
T = To + deltaT*exp(-alpha*z).*cos(omega*t-alpha*z);
M(t)=getframe;
end
Movie(M)

dw = sqrt(2*kappa/omega) %skin depth
depth = pi/(sqrt(omega/(2*kappa))) %depth at 180 degrees out of phase
T1 = To + deltaT*exp(-alpha*z).*cos(omega*t-alpha*z);


figure(1);
plot(T,z)
xlabel('Temperature (C)')
ylabel('Depth (km)')
set(gca,'ydir','reverse')
From: Brandon on 3 Dec 2009 19:30
Despite all the triple posting, I still need assistance with this question!

"Brandon " <bflickinger(a)umail.ucsb.edu> wrote in message <hf9irt$fae$1(a)fred.mathworks.com>...
> I have written the following code and I am trying to make a movie, but I receive the error ??? Subscript indices must either be real positive integers or logicals.
> Why does this happen?
>
> Error in ==> P4_2 at 14
> M(t)=getframe;
>
> kappa = 1*10^-12; %mm^2/s
> Ts = 86400; %temperature fluctuation in section
> To = 20; %initial temperature in celsius
> deltaT = 5; %change in temperature in celcius
> t = 0;
> omega = 2*pi/Ts;
> z = 0:150;
> alpha = sqrt(omega/(2*kappa));
>
> for t=0:1:100
> T = To + deltaT*exp(-alpha*z).*cos(omega*t-alpha*z);
> M(t)=getframe;
> end
> Movie(M)
>
> dw = sqrt(2*kappa/omega) %skin depth
> depth = pi/(sqrt(omega/(2*kappa))) %depth at 180 degrees out of phase
> T1 = To + deltaT*exp(-alpha*z).*cos(omega*t-alpha*z);
>
>
> figure(1);
> plot(T,z)
> xlabel('Temperature (C)')
> ylabel('Depth (km)')
> set(gca,'ydir','reverse')
From: Brandon on 3 Dec 2009 19:33
Despite all the triple posting, I still need assistance with this question!

"Brandon " <bflickinger(a)umail.ucsb.edu> wrote in message <hf9irt$fae$1(a)fred.mathworks.com>...
> I have written the following code and I am trying to make a movie, but I receive the error ??? Subscript indices must either be real positive integers or logicals.
> Why does this happen?
>
> Error in ==> P4_2 at 14
> M(t)=getframe;
>
> kappa = 1*10^-12; %mm^2/s
> Ts = 86400; %temperature fluctuation in section
> To = 20; %initial temperature in celsius
> deltaT = 5; %change in temperature in celcius
> t = 0;
> omega = 2*pi/Ts;
> z = 0:150;
> alpha = sqrt(omega/(2*kappa));
>
> for t=0:1:100
> T = To + deltaT*exp(-alpha*z).*cos(omega*t-alpha*z);
> M(t)=getframe;
> end
> Movie(M)
>
> dw = sqrt(2*kappa/omega) %skin depth
> depth = pi/(sqrt(omega/(2*kappa))) %depth at 180 degrees out of phase
> T1 = To + deltaT*exp(-alpha*z).*cos(omega*t-alpha*z);
>
>
> figure(1);
> plot(T,z)
> xlabel('Temperature (C)')
> ylabel('Depth (km)')
> set(gca,'ydir','reverse')
From: dpb on 3 Dec 2009 19:38
Brandon wrote:
> Despite all the triple posting, I still need assistance with this question!
>
> "Brandon " <bflickinger(a)umail.ucsb.edu> wrote in message <hf9irt$fae$1(a)fred.mathworks.com>...
>> I have written the following code and I am trying to make a movie,
>> but I receive the error
>> ??? Subscript indices must either be real positive integers or logicals.
>> Why does this happen?
>>
>> Error in ==> P4_2 at 14
>> M(t)=getframe;
>>
....

What is t at that point in debug or w/

disp(t) ??

Somehow it appears ML thinks it isn't an integer...find out why.

--
From: Brandon on 3 Dec 2009 19:50
dpb <none(a)non.net> wrote in message <hf9lmn$qt0$1(a)news.eternal-september.org>...
> Brandon wrote:
> > Despite all the triple posting, I still need assistance with this question!
> >
> > "Brandon " <bflickinger(a)umail.ucsb.edu> wrote in message <hf9irt$fae$1(a)fred.mathworks.com>...
> >> I have written the following code and I am trying to make a movie,
> >> but I receive the error
> >> ??? Subscript indices must either be real positive integers or logicals.
> >> Why does this happen?
> >>
> >> Error in ==> P4_2 at 14
> >> M(t)=getframe;
> >>
> ...
>
> What is t at that point in debug or w/
>
> disp(t) ??
>
> Somehow it appears ML thinks it isn't an integer...find out why.
>
> --

I'm not sure I understand. My code looks exactly like the example provided in Matlab help and i'm not sure why it wouldn't think that t was an integer.
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