Matlab

Intersecting circles
I would like two write a function to determine if two circles C1 y C2 centered at points c1 = (x1,y1) and c2 = (x2,y2) and with radios r1 and r2 intersect at any point. ¿Is it enough to calculate the distance between the centers of C1 and C2 and compare it to the sum of their radios? I mean, something like this: fu... 3 Jul 2010 14:34

Combining arrays in a patterned fashion and/or moving rows/columns in a matrix
Hi, Is there any simple way in MATLAB to take a cell array of numbers and assign the contents of each cell to a matrix position in a preallocated matrix in a patterned fashion? Or, alternatively, are there commands to manipulate individual rows and colums of a matrix? Here is an example of what I would like it to be ... 6 Jul 2010 11:09

getsampleusingtime method gives an error
Hey dears, I have a problem with time series and with a method called getsampleusingtime. I have a ts object and the times are in format eg. 13-Jun-2010 17:00:00. Im trying to extract certain periods of this data to new ts objects with getsampleusingtime like this: ts = getsampleusingtime(DATA, datenum(2010, 6, ... 3 Jul 2010 16:47

damping coefficient ? DC Motor, Simulink
Hello all, I am confused with the Damping Coefficient of a motor, please help. There are different Damping Coefficients, and they seem not to be the same as the speed-torque curve ? According to this : http://www.smma.org/PDFs/SMMA_motor_glossary.pdf Anyhow, the motor I have is the 3257024CR by Faulhaber. The... 10 Jul 2010 10:30

optimization
Hello I am a lerner in Stata and have some major problems replicating results from a paper. The Lagrangian was differentated and reformulatet, gives: (ni. - nii)/(1-pi) +(n.i - nii)/(pi) +lamda = 0 für alle i = 1,...,20 and Sum (pi) =1 n.i = sum row ni. = sum column nii = diagonal entries Pii = cell-p... 3 Jul 2010 12:22

optimization
Hello I am a lerner in Stata and have some major problems replicating results from a paper. The Lagrangian was differentated and reformulatet, gives: (ni. - nii)/(1-pi) +(n.i - nii)/(pi) +lamda = 0 für alle i = 1,...,20 and Sum (pi) =1 n.i = sum row ni. = sum column nii = diagonal entries Pii = cell-p... 5 Jul 2010 12:11

Thanks Re: pre-allocation question
"Christopher " <christopher.badman(a)au.saabgroup.com> wrote in message <i0jo6b$nis$1(a)fred.mathworks.com>... "Sean Douglas" <seanjdouglas(a)hotmail.com> wrote in message <i0jh93$32c$1(a)fred.mathworks.com>... hey guys i am having trouble pre-allocating memory. I am trying to follow directions i found on the internet ... 3 Jul 2010 12:22

regexprep tokens
"lily " <mediocrity111(a)hotmail.com> wrote in message <i0n14d$ecp$1(a)fred.mathworks.com>... My question is how to use function regexprep to replace a whole string with a part of it. K>> str='a_b_c.3d.6';regexprep(str,'\w?_(\w+)_\w+?','$1') ans = b.3d.6 What I want is only &#8216;b&#8217;,how to define the ... 3 Jul 2010 12:22

Problem in reading FITS file from fitsread.
I have many fits file with the extension .lc (denoting light curves). Running one of them with fitsinfo its giving: FileSize: 60480 Contents: {'Primary' 'Binary Table' 'Binary Table' 'Binary Table'} PrimaryData: [1x1 struct] BinaryTable: [1x3 struct] And by running fitsrea... 3 Jul 2010 11:16

Problem in reading FITS file from fitsread.
I have many fits file with the extension .lc (denoting light curves). Running one of them with fitsinfo its giving: FileSize: 60480 Contents: {'Primary' 'Binary Table' 'Binary Table' 'Binary Table'} PrimaryData: [1x1 struct] BinaryTable: [1x3 struct] And by running fitsrea... 3 Jul 2010 11:15