Matlab

extract data from image-histogram as two x,y-data
hi guys, is it possible to extract data from an image-histogram as two simple x & y-datas? i've tried to use the function get(..., 'Xdata') but it only delivers [1x4096 double]... what i need is as if the image-histogram like a simple plot, so i can extract every points from the histogram, and maybe later import th... 9 Jun 2010 07:31

the least squares method for phase unwrapping
i hava some questions about the program below。after“ phi3=ifft2(PH);”，i get a complex martix ,but i need a martix equal peaks(200)*3,not a complex one.so i think i need do some before iff2. how should i do? or if i need modify somewhere？ thank you for reading my question～ p... 8 Jun 2010 11:25

Complex Set of Differential Equations
Hi, I have this complex system of equations to be solved and I am unable to do it on matlab- Solve for m1(t), m2(t), T1(t), T2(t), where all are functions of time t m1+m2=e7....(for all time t).................................(1) m1*T1+m2*T2=e8...(for all time t)...........................(2) p1=e9*m1*T1/(... 8 Jun 2010 11:25

Complex Set of Differential Equations
Hi, I have this complex system of equations to be solved and I am unable to do it on matlab- Solve for m1(t), m2(t), T1(t), T2(t), where all are functions of time t m1+m2=e7....(for all time t).................................(1) m1*T1+m2*T2=e8...(for all time t)...........................(2) p1=e9*m1*T1/(... 8 Jun 2010 10:17

Poisson Noise Generation
Hello, I need to generate poisson noise in MATLAB. For image processing we can use the following For any image I J= imnoise(I, 'poisson'). This add poisson noise to the image. My question is, Can I use the same concept to add poisson noise to a given signal. For any given signal S J= imnoise(S, 'poiss... 8 Jun 2010 10:17

Add constraints to portopt
Hello, I am using portopt to perform portfolio optimization. The function returns the weights of the different assets, as requested. So far so good. Now, i have two problems with the solution this function returns, and i was wondering if there is a way to constraint the solution to meet my additional requir... 8 Jun 2010 10:17

Error in betarnd toolbox function
Hi, I tried to use the standard toolbox betarnd function for a simple project but I got stuck right from the beginning in what appears to be a bug. My code is: y = betarnd(2,5,1,10000); hist(y,100); and I get the error: Warning: Input arguments must be scalar. In randg at 18 In betarnd at 34 In ... 8 Jun 2010 10:17

anonymous function
Hello everybody, I have a question regarding anonymous functions. My problem is the following: "cp" is a function handle - a polynominal with "x" as variable now I want to define another function "s" which should be "cp/x". In Matlab: cp = @(x) (0.538657+9.11129*10^(-6)*x-90.2725*x.^(-1)-43449.3*x.^(-2)+1.... 8 Jun 2010 10:17

Remembering user input from an old execution
Hi everybody, it's the first time that I am confronted with the following problem. I have a simple application where the user is prompted to choose a file (with uigetfile). In my specific case, this involves also changing the directory. I would like that, the next time the same user will use the application, the de... 8 Jun 2010 10:17

extract cvt flag port block parameter
I want to extract CVT Flag port,s parameter info from targetlink model ,then write it into csv fle, how can i do it . thank you . ... 8 Jun 2010 10:17