
August 3rd, 2006, 09:27 PM
#1
Matlab Help Forum
Hi all,
Does any1 know any Matlab help forum ? I'm in desperate need of help in Matlab Simulink.
cheers

August 4th, 2006, 01:38 AM
#2
Re: Matlab Help Forum
You are in the wrong place to ask...anyway as I know Matlab official forum is the best place to visit.

September 21st, 2006, 09:56 PM
#3
Re: Matlab Help Forum
My personal favorite is http://www.kluid.com its a really good site for Matlab help, check if they are back on. Mathworks is also a good one.
Originally Posted by pc_newbies
Hi all,
Does any1 know any Matlab help forum ? I'm in desperate need of help in Matlab Simulink.
cheers

June 4th, 2014, 12:24 PM
#4
Re: Matlab Help Forum
Can anyone tell what is wrong with this code.... thanks in advance.../\
clc
clear all
syms Rx2 Rx3 tt2 Ry2 Ry3 tt3 Rx4 Ry4 tt4 %symbolic representation
a=input('l1 l2 l3 l4 []');
l1=a(1,1);
l2=a(1,2);
l3=a(1,3);
l4=a(1,4);
w=input('enter the value of angular velocity'); %input the angular velocity
t=0; %time
iterationvalues=zeros(9,100);
delta=zeros(9,1); %initialise the matrix as zeros
final=zeros(9,1);
initial=[1.1 0.7 (30*pi)/180 5.5 1.9 (353*pi)/180 6.6 1.1 (330*pi)/180]';%initial from solidworks
for i=1:1:1000 %i from 1 to 100
Cn=[ Rx2(l2/2)*cos(tt2); %constraints
Ry2(l2/2)*sin(tt2);
tt2w*t(30*pi)/180;
Rx2Rx3+(l2/2)*cos(tt2)+(l3/2)*cos(tt3);
Ry2Ry3+(l2/2)*sin(tt2)+(l3/2)*sin(tt3);
Rx3Rx4+(l3/2)*cos(tt3)+(l4/2)*cos(tt4);
Ry3Ry4+(l3/2)*sin(tt3)+(l4/2)*sin(tt4);
Rx4l1+(l4/2)*cos(tt4);
Ry4+(l4/2)*sin(tt4);
];
Cq=jacobian(Cn,[Rx2 Ry2 tt2 Rx3 Ry3 tt3 Rx4 Ry4 tt4]);%symbolic jacobian
Cq=subs(Cq,{Rx2 Ry2 tt2 Rx3 Ry3 tt3 Rx4 Ry4 tt4},initial'); %substitute into jacobian
Cn=subs(Cn,{Rx2 Ry2 tt2 Rx3 Ry3 tt3 Rx4 Ry4 tt4},initial');%substitute into constraints
delta=(Cq\Cn); %find the delta matrix
%if(norm(anse)>1e6) %breaking condition for divergence
%break;
%end
final=initial+delta; %values for next iteration
iterationvalues(:,i)=final;
initial=final;
end
display(delta)
display(final);

August 19th, 2014, 02:26 AM
#5
Re: Matlab Help Forum
In the following link you can find an interesting piece of code to calculate easily the elastic response spectra, shock spectra, etc. of a given acceleration timehistory of an earthquake. Apart from this, with the Elastic Response Spectrum (ERS) function you can perform dynamic response spectrum analysis of single or multi degree of freedom (SDOF or MDOF) structures. Enjoy!
http://www.mathworks.com/matlabcentr...sponsespectra
Regards,
George Papazafeiropoulos

September 21st, 2014, 09:06 AM
#6
Re: Matlab Help Forum
You should find lots of valuable code on the official website of mathworks. If you are still stuck i have used a website homeworkhelponline.net, im not sure if they are trusted, but did the work for me.

March 10th, 2015, 01:32 PM
#7
Re: Matlab Help Forum
Hi all,
Can you help me about connection matlab mobile with computer ? I tried I did all things but I am taking this message "Could not connect to the server" how can I solve this problem?

April 7th, 2015, 01:55 AM
#8
Re: Matlab Help Forum
Dear friends
does any one help me in this problem
how can i create matlab code for charge simulation method of electric fields

May 17th, 2015, 11:51 AM
#9
Re: Matlab Help Forum
Hi,
I have a database with monthly yields for 17 maturities (91 observations) and I want to perform a forecast of the yield curve for 1m ahead through a Random Walk model. I would be very grateful if someone could help me with the code for this.
Thank you in advance!

November 18th, 2015, 06:51 AM
#10
Re: Matlab Help Forum
Hi all
Someone uses the box PDE Matlab 2015?
It create charts, but I not found the calculated data... The program offers this data?
thanks

March 12th, 2018, 11:59 AM
#11
Re: Matlab Help Forum
This code has no problems
You must define the variable a as a 1*4 matrix.
The time to run the calculation is high and you have to wait.
clc
clear all
syms Rx2 Rx3 tt2 Ry2 Ry3 tt3 Rx4 Ry4 tt4 %symbolic representation
% a=input('l1 l2 l3 l4 []');
a=[1 2 3 4];
l1=a(1,1);
l2=a(1,2);
l3=a(1,3);
l4=a(1,4);
w=input('enter the value of angular velocity'); %input the angular velocity
t=0; %time
iterationvalues=zeros(9,100);
delta=zeros(9,1); %initialise the matrix as zeros
final=zeros(9,1);
initial=[1.1 0.7 (30*pi)/180 5.5 1.9 (353*pi)/180 6.6 1.1 (330*pi)/180]';%initial from solidworks
for i=1:1:1000 %i from 1 to 100
Cn=[ Rx2(l2/2)*cos(tt2); %constraints
Ry2(l2/2)*sin(tt2);
tt2w*t(30*pi)/180;
Rx2Rx3+(l2/2)*cos(tt2)+(l3/2)*cos(tt3);
Ry2Ry3+(l2/2)*sin(tt2)+(l3/2)*sin(tt3);
Rx3Rx4+(l3/2)*cos(tt3)+(l4/2)*cos(tt4);
Ry3Ry4+(l3/2)*sin(tt3)+(l4/2)*sin(tt4);
Rx4l1+(l4/2)*cos(tt4);
Ry4+(l4/2)*sin(tt4);
];
Cq=jacobian(Cn,[Rx2 Ry2 tt2 Rx3 Ry3 tt3 Rx4 Ry4 tt4]);%symbolic jacobian
Cq=subs(Cq,{Rx2 Ry2 tt2 Rx3 Ry3 tt3 Rx4 Ry4 tt4},initial'); %substitute into jacobian
Cn=subs(Cn,{Rx2 Ry2 tt2 Rx3 Ry3 tt3 Rx4 Ry4 tt4},initial');%substitute into constraints
delta=(Cq\Cn); %find the delta matrix
%if(norm(anse)>1e6) %breaking condition for divergence
%break;
%end
final=initial+delta; %values for next iteration
iterationvalues(:,i)=final;
initial=final;
i
end
display(delta)
display(final);
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