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Thu, 19 Apr 2012 04:59:16 +0000
syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874078
Quynh Tram Nghuyen Thi
hello everyone<br>
as i ve read som books of reference with instructions of detail . its one of them as folwoing:<br>
syms x<br>
y= 2*x^2+5*x;<br>
diff(y)<br>
4*x +5<br>
BUT WHEN I PRACTICED in matlab 7.6 then It CAME ELLOR ryte after the 1st line ( syms x). i really dont undertsand. then HOW I CAN SOLVE MANY EQUATIONS WITH the general variables like above.<br>
its mean that i need to find A DERIVATIVE of 1 FUNCT ION EXPRESSION ( not value ) then ... ANY SOLUTIONS except for the code above??<br>
<br>
please give me fast look & feekbacks if poissbile <br>
thanks

Thu, 19 Apr 2012 05:17:07 +0000
Re: syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874079
Nasser M. Abbasi
On 4/18/2012 11:59 PM, Quynh Tram Nghuyen Thi wrote:<br>
> hello everyone<br>
> as i ve read som books of reference with instructions of detail . its one of them as folwoing:<br>
> syms x<br>
> y= 2*x^2+5*x;<br>
> diff(y)<br>
> 4*x +5<br>
> BUT WHEN I PRACTICED in matlab 7.6 then It CAME ELLOR ryte after the 1st line ( syms x).<br>
>i really dont undertsand. then HOW I CAN SOLVE MANY EQUATIONS WITH the general<br>
>variables like above.<br>
> its mean that i need to find A DERIVATIVE of 1 FUNCT ION EXPRESSION ( not value ) then<br>
>... ANY SOLUTIONS except for the code above??<br>
><br>
> please give me fast look& feekbacks if poissbile<br>
> thanks<br>
<br>
The code works on my Matlab ok 2012a:<br>
<br>
<br>
K>> syms x<br>
y= 2*x^2+5*x;<br>
diff(y)<br>
<br>
4*x +5<br>
<br>
If you do not get this answer, you should contact Mathworks<br>
technical support. What does the command 'ver' show on<br>
your Matlab?<br>
<br>
Nasser

Thu, 19 Apr 2012 06:57:07 +0000
Re: syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874091
Quynh Tram Nghuyen Thi
"Nasser M. Abbasi" <nma@12000.org> wrote in message <jmo74j$r1d$1@speranza.aioe.org>...<br>
> On 4/18/2012 11:59 PM, Quynh Tram Nghuyen Thi wrote:<br>
> > hello everyone<br>
> > as i ve read som books of reference with instructions of detail . its one of them as folwoing:<br>
> > syms x<br>
> > y= 2*x^2+5*x;<br>
> > diff(y)<br>
> > 4*x +5<br>
> > BUT WHEN I PRACTICED in matlab 7.6 then It CAME ELLOR ryte after the 1st line ( syms x).<br>
> >i really dont undertsand. then HOW I CAN SOLVE MANY EQUATIONS WITH the general<br>
> >variables like above.<br>
> > its mean that i need to find A DERIVATIVE of 1 FUNCT ION EXPRESSION ( not value ) then<br>
> >... ANY SOLUTIONS except for the code above??<br>
> ><br>
> > please give me fast look& feekbacks if poissbile<br>
> > thanks<br>
> <br>
> The code works on my Matlab ok 2012a:<br>
> <br>
> <br>
> K>> syms x<br>
> y= 2*x^2+5*x;<br>
> diff(y)<br>
> <br>
> 4*x +5<br>
> <br>
> If you do not get this answer, you should contact Mathworks<br>
> technical support. What does the command 'ver' show on<br>
> your Matlab?<br>
> <br>
> Nasser<br>
<br>
Thanks Nasser. i just tried as u told already, it came:<br>
<br>
MATLAB Version 7.6.0.324 (R2008a)<br>
MATLAB License Number: 161051<br>
Operating System: Microsoft Windows Vista Version 6.1 (Build 7600)<br>
Java VM Version: Java 1.6.0 with Sun Microsystems Inc. Java HotSpot(TM) 64Bit Server VM mixed mode<br>
<br>
then ... it means my ver is old for the code above... i should replace a new ver like your. ryte??<br>
do you another idea again??<br>
iam still waiting for you dear.

Thu, 19 Apr 2012 07:01:05 +0000
Re: syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874092
Nasser M. Abbasi
On 4/19/2012 1:57 AM, Quynh Tram Nghuyen Thi wrote:<br>
<br>
> Thanks Nasser. i just tried as u told already, it came:<br>
><br>
> MATLAB Version 7.6.0.324 (R2008a)<br>
> MATLAB License Number: 161051<br>
> Operating System: Microsoft Windows Vista Version 6.1 (Build 7600)<br>
> Java VM Version: Java 1.6.0 with Sun Microsystems Inc. Java HotSpot(TM) 64Bit Server VM mixed mode<br>
><br>
<br>
Can you see the rest of the above command to see if you have the<br>
symbolic toolbox installed?<br>
<br>
> then ... it means my ver is old for the code above...<br>
<br>
it is not that old. it should work, unless you do not have the<br>
symbolic toolbox. You need to look at the full list of 'ver'<br>
output.<br>
<br>
<br>
i should replace a new ver like your. ryte??<br>
> do you another idea again??<br>
> iam still waiting for you dear.<br>
<br>
<br>
Nasser

Thu, 19 Apr 2012 07:33:16 +0000
Re: syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874099
Quynh Tram Nghuyen Thi
"Nasser M. Abbasi" <nma@12000.org> wrote in message <jmod7h$707$1@speranza.aioe.org>...<br>
> On 4/19/2012 1:57 AM, Quynh Tram Nghuyen Thi wrote:<br>
> <br>
> > Thanks Nasser. i just tried as u told already, it came:<br>
> ><br>
> > MATLAB Version 7.6.0.324 (R2008a)<br>
> > MATLAB License Number: 161051<br>
> > Operating System: Microsoft Windows Vista Version 6.1 (Build 7600)<br>
> > Java VM Version: Java 1.6.0 with Sun Microsystems Inc. Java HotSpot(TM) 64Bit Server VM mixed mode<br>
> ><br>
> <br>
> Can you see the rest of the above command to see if you have the<br>
> symbolic toolbox installed?<br>
> <br>
> > then ... it means my ver is old for the code above...<br>
> <br>
> it is not that old. it should work, unless you do not have the<br>
> symbolic toolbox. You need to look at the full list of 'ver'<br>
> output.<br>
> <br>
> <br>
> i should replace a new ver like your. ryte??<br>
> > do you another idea again??<br>
> > iam still waiting for you dear.<br>
> <br>
> <br>
> Nasser<br>
<br>
yea, i give a slow look in its list but it hav no SYMBOLIC word.<br>
it means ... yes, need a installed tooldbox of symbolic??<br>
But how i can install it while i installed the disk 2008 a already.<br>
or i should replace a lastest ver 2012 like yours ( if soo, it abit disappointed, isnt it dear??<br>
m just thinking...<br>
hey, thanks Nasser

Thu, 19 Apr 2012 07:57:29 +0000
Re: syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874102
Nasser M. Abbasi
On 4/19/2012 2:33 AM, Quynh Tram Nghuyen Thi wrote:<br>
<br>
><br>
> yea, i give a slow look in its list but it hav no SYMBOLIC word.<br>
<br>
Then you do not have the symbolic toolbox !<br>
<br>
> it means ... yes, need a installed tooldbox of symbolic??<br>
<br>
Yes.<br>
<br>
> But how i can install it while i installed the disk 2008 a already.<br>
<br>
You can buy it as a separate toolbox from your Mathworks store. Go now<br>
and login in there using your account, and you can buy it and download<br>
it electronically and the installer will install it on top of your<br>
current Matlab.<br>
<br>
> or i should replace a lastest ver 2012 like yours<br>
<br>
That is up to you if you want to upgrade or not before<br>
buying the toolbox. But If you are thinking of upgrading, then better<br>
to do that first, then buy the symbolic toolbox for 2012.<br>
<br>
( if soo, it abit disappointed, isnt it dear??<br>
> m just thinking...<br>
> hey, thanks Nasser<br>
<br>
Nasser

Thu, 19 Apr 2012 08:12:13 +0000
Re: syms x; y=2*x^2=> error???? why to all?
http://nl.mathworks.com/matlabcentral/newsreader/view_thread/319270#874104
Quynh Tram Nghuyen Thi
"Nasser M. Abbasi" <nma@12000.org> wrote in message <jmogh8$f10$1@speranza.aioe.org>...<br>
> On 4/19/2012 2:33 AM, Quynh Tram Nghuyen Thi wrote:<br>
> <br>
> ><br>
> > yea, i give a slow look in its list but it hav no SYMBOLIC word.<br>
> <br>
> Then you do not have the symbolic toolbox !<br>
> <br>
> > it means ... yes, need a installed tooldbox of symbolic??<br>
> <br>
> Yes.<br>
> <br>
> > But how i can install it while i installed the disk 2008 a already.<br>
> <br>
> You can buy it as a separate toolbox from your Mathworks store. Go now<br>
> and login in there using your account, and you can buy it and download<br>
> it electronically and the installer will install it on top of your<br>
> current Matlab.<br>
> <br>
> > or i should replace a lastest ver 2012 like yours<br>
> <br>
> That is up to you if you want to upgrade or not before<br>
> buying the toolbox. But If you are thinking of upgrading, then better<br>
> to do that first, then buy the symbolic toolbox for 2012.<br>
> <br>
> ( if soo, it abit disappointed, isnt it dear??<br>
> > m just thinking...<br>
> > hey, thanks Nasser<br>
> <br>
> Nasser<br>
<br>
thanks , Nasser.