Matlab

How to fit my data to y=a*exp(-bx) by restricting 0<a<1?
There are 10 points, (x,y). I want to fit them to y=a*exp(-bx) and to find the value a and b. But a is between 0 and 1. How to fit this curve? My code is myfun = fittype('a*exp(-b*x)','independent','x'); fitopt = fitoptions('Method','NonLinearLeastSquares'); [pof,gof] = fit(x,y,myfun,fitopt); But how to restrict... 1 Apr 2010 16:52

Not memorizing an output of a function
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi. I have a function, say, myfunction, which takes some parameters, and output some variables, i.e. it is called using [var1 var2 ... varn] = myfunction(param1, param2, ..., paramn). The problem is that I only want to keep varn in memory once the function ... 2 Apr 2010 13:43

pattern recognition/image analysis
Hi guys I'm a beginner in MATLAB and i really need some help with something -------------------------------------------------------------------------------------------------------------------------- I want to design a system that could recognize intact plastic bottles from defective ones. The main idea: I get a ... 3 Apr 2010 09:18

To display date string in data cursor
"Max Shen" <shen_zhongchen(a)hotmail.com> wrote in message <hdcj4v$mq8$1(a)fred.mathworks.com>... I have a question about data cursor. I have a figure, which uses date string as x axis label, and uses its corresponding value as y axis value. I want to place my cursor on any data point to display the specific dat... 1 Apr 2010 15:44

Matlab code for BICM
Hello, I know how to calculate gama values, you should do this las follows, but I have a question for you, I did the same thing as you but my MMSE detector doesn't work, that is my code, function [LLR1,LLR0]=SISO_MMSE_MIMO(H,y,Es,N0,Omega,List,La0,La1,nt,nr,m); %Es: is the symbol energy of the constellation %z=c... 1 Apr 2010 14:37

quiver ode
Hey, I'd like to plot velocity vectors for a set of ode's however the implementation makes me confused. I had a look at the following simple example: tspan = [0 10]; yazero = [1; 1]; ybzero = [-5; 2] ; yczero = [5; -2]; [ta, ya] = ode45(@pend, tspan, yazero); [tb, yb] = ode45(@pend, tspan, ybzero); [tc, ... 1 Apr 2010 14:37

dilation and erosion code
I need code for dilation and erosion , i don't want to use function imdilate() and imerode() so plz send me both the codes... ... 10 Apr 2010 12:23

Help with aviobj--hide figure will saving movie
The Help document doesn't seem to be much help. My code has a small time step to avoid instability and therefore has a high end time. It takes entirely too long to run it with getframe and often results in out of memory. I have many loops within my code and the help documentation is not clear in how to apply it. I ... 1 Apr 2010 14:37

Listing a Cell Array's Contents
Dear All, Suppose I have a {1x2} cell array containing a {3x1} and a {4x1} cell, both of which containing strings. Is there a nifty way of listing these contents (as a {7 x 1} cell, that is)? Or perhaps as a {4x2} with an empty cell in the corner? ... 1 Apr 2010 14:37

Need code very very Urgently!!!!!!
Hi every one!!, Im new to here, im doing my master degree in one of the leading university, and im doing main project right now, "Automatic road extraction from the satellite image" is the one of the module in my project. im tried to extract the road from the satellite images by using Matlab, but i can't do it r... 1 Apr 2010 19:07