Matlab

FFT of Impulse response
Hi, I am new to matlab and need a hand in using the FFT function in matlab. THE SITUATION I am shining an ultrasound field with frequency content from around 1MHz to around 230MHz at a film. The film thickness changes over time - this data I have. I need to decouple the frequency content from the thickness cha... 6 Aug 2010 08:15

SimBiology
Hello, I have discrete model which containing ODEs structured by some cohorts. Is it possible for me to apply Simbiology toolbox for the parameter sensitivity analysis. 2. If yes, can someone advise me how to create the modelObj file. I have no idea what should i put in the filename(is this only contains ODEs?...... 4 Aug 2010 12:30

multiple intersections area
Hello everyone, I have an irregular shaped polygon (p2) and a circle. So I was trying to find the intersection area by using polybol to find the intersections and then polyarea, but that is working when there is just one intersection between the polygon and the circle, so my question: Anyone could suggest how to fin... 5 Aug 2010 05:53

Problem using the 'lecroy_basic_driver'!
when I use the 'lecroy_basic_driver.mdd' to communicate with lecroy waverunner 6051A osilloscope,it always returns an error that there is no 'driverData' property for device objects.Can you tell me how this mistake happens? Thanks! detail: interfaceObj = instrfind('Type', 'tcpip', 'RemoteHost', '192.168.1.5', 'Rem... 4 Aug 2010 10:18

mean of quantized hsv image
sir i am trying to write the following code to find the mean of quantized image in this code i am replicating the sides,but there i some error [m n]=size(q); % We need to be able to apply MEAN filter at the boundary pixels. % The easiest way to handle this is to set up a matrix A2 that has % the original ima... 4 Aug 2010 10:18

Simhydraulics (
Hello Arnaud, I have made two similar circuits with gas charged as well as spring loaded accumulators. All the parameters are same for both circuits. Please have a look at them on: http://www.4shared.com/file/wrnQ3NP4/gas_and_spring-accumulator_cir.html This is a zip file containing two circuits. I have inclu... 9 Aug 2010 12:19

symbolic transfer function
Hi i have this a matrix with symbolic transfer functions like: (s^3 +12346512s^2 + 43242s +1245) / (s^5 +1234s^4+.........+12443) but more complicated. I'd like to express them as gain*Poles/zeros like : K(s+123)(s+432)/((s+ 563)....(s+8765)) I tried to use the command 'factor', but without expected resul... 4 Aug 2010 10:18

Threshing with Sobel Edge Detection
Hi everyone, I'm adding edge detection to a greyscale image. I want to alter the thresh to remove unwanted artifacts/false positives. How do I add thresh this part of my code (below)? e = edge (grey, 'sobel'); I want to be able to alter the value for thresh to tweak the edge detection to give me optimal result... 4 Aug 2010 08:08

Logistic regression
I am looking for a function to undertake a logistic regression where the dependent variable is binary 0 or 1, and the independent variables are continuous, with one categorical dataset. The problem I'm coming across is that if I use 'mnrfit' it states that Y should contain positive integer category numbers. Do I just c... 4 Aug 2010 09:13

Interpolation
Hello everybody, I am not able to overcome following problem so I´d like to please you for help. I have calculated a matrix which contains only small amount of important data. These values are formed in an one pixel width curves (skeleton), other values are NaN as can be seen bellow. NaN NaN NaN 0.5 NaN 0.4 NaN ... 4 Aug 2010 10:18