Matlab

matrix manipulation
Hi all, I am a very simple question, but I am not sure what function that I shall use. I have a matrix as follows, a = NaN 4 NaN 3 2 1 How can I count the number of 'NaN' in the matrix? Can I change the 'NaN' to zeros at once? I tried to a(a==NaN)=0, but it does not work. Thank yo... 9 Apr 2010 08:52

fitting a contour with a quadrangle
Hi, I'm trying to get data about the trajectory of a rectangular card falling into water. For this I'm recording images with 2 perpendicular cameras. It appears the elliptical fit used by the image processing toolbox (regionprops : orientationrad for example) is not adapted to the geometry of the cards. Therefore... 9 Apr 2010 07:47

Bilevel optimization
Hello friends, Kindly let me know if fmincon can be used to execute bilevel optimization. I have to minimize a function which has three nested minimization functions. Can this be accomplished using fmincon? ... 14 Apr 2010 04:23

Cross correlation of periodic signals
%{ Good day to all. I have a problem when cross correlating periodic signals and finding the correct delay between the two signals. In the code below i generated a 100 hertz sine wave and 0.5 sec delayed version of it. When i cross correlate the two sequences i expect to find the delay between the two sequences to be... 13 Apr 2010 13:56

READING TEXT BOX VALUE....
HOW I CAN USE THE VALUE ENTERED IN A TEXT BOX ,IN MY .m FILE..? means, there is a text box in a .fig file and i need to cooperate that .fig file with my main .m file through that text box... pls help.. ... 9 Apr 2010 06:42

colormap is not working now
Hello, I have Matlab 2009b. colormap function is not working. It open empty figure page. Before if I did colormap([1 0 0]), I get red color figure but now I only get the empty gray figure page. ... 15 Apr 2010 14:44

Draw major and minor axes on ellipse
Hi, I'm having trouble drawing the major and minor axes on an ellipse that I've drawn with ellipse.m. Does anyone know how I can do this? On another issue, how do I determine the polar coordinates (eccentric points?) of the ellipse drawn? Thanks very much for your help. Conrad ... 9 Apr 2010 06:41

error to build cshared library
Hi everyone, I tried to build c shared library example given on http://www.mathworks.com/access/helpdesk/help/toolbox/compiler/f2-972343.html but it shows error when i run mcc -B csharedlib:libmatrix addmatrix.m multiplymatrix.m eigmatrix.m -v The error looks like followings --------------- c:\progra... 9 Apr 2010 12:15

hiii frnds
to one and all if u r sure about price of MATLAB current version then reply me as soon as possible. ... 9 Apr 2010 06:41

cost of matlab 2010a
Do u have any idea about price of MATLAB current version if have then just tell me  Thanx -------------------------------------------------------------------------------------------------------- OK. So (to state the obvious) call up the Mathworks and ask them. Or ask them via the web: http://www.... 13 Apr 2010 11:41