Matlab

array of struct like dir function
Hi I am new in Matlab but i am struggling hard. I ve made a gui with a list box I also made a function that is working perfect in what i want but i used as input all the files from list box (fn =dir('AS*')). The problem is that this function i want to be executed only for file names selected by the user from the ... 29 Apr 2010 10:05

Kuhn-Tucker constraints in dynamic optimization
I am solving a system of dynamic and algebraic equations using ode23t in combination with a (singular) mass matrix. One of my variables has a non-negativity constraint and I have some problems programming this. In mathematical form my equations look like this: dy/dt=f(t,x,y,p) for all t 0=g(t,x,y,p,eta) for all t 0=... 30 Apr 2010 02:55

How can I plot two curves with two different y-axis (placed at right and left) with one reverse-logarithmic x-axis?
How can I plot two curves with two different y-axis (placed at right and left) with one reverse-logarithmic x-axis? Something like this BUT with a reverse x-axis for both curves: x = 0:0.01:20; y1 = 200*exp(-0.05*x).*sin(x); y2 = 0.8*exp(-0.5*x).*sin(10*x); [AX,H1,H2] = plotyy(x,y1,x,y2,'semilogx'); Thanks!... 29 Apr 2010 12:23

Get mouse coordinates inside axes
Dear Can anyone help me to get the coordinates of my mouse only inside an axes. I want to make an erose function with my mouse. So when I push my button I got this code: global hSeg; global axesWidth; global axesHeight; axesPositions= get(hSeg,'Outerposition'); % this don't work axesWidth = axesPositions(1,... 29 Apr 2010 12:23

test data for neural network
I have done train data by using neural network. When i want to test the image by, it shows the error. ??? Subscript indices must either be real positive integers or logicals. Error in ==> test_data at 112 xnor(i,j) = ((0.8/d(j))*(x_un_nor(i,j) - xmin(j)) + 0.1); This is my program after feature extrac... 29 Apr 2010 10:06

Output small Frequency Clock from a DAQ-Board !!!
Hi, My DAQ-Board is connected to a Sensor, which needs to be Digital clocked with 40 kHz Frequency (ca. 26µs), because my DAQ-Board dont support Analog-Output. I was reading a lot of Documentations from Mathworks and looking around on the Net. But unfortunatly didnt found what I need. Now I figured that I mus... 29 Apr 2010 08:58

How to get the fourier spectrum of an image
Hi. I am a beginner in image processing and matlab. Can anybody let me know the matlab code to get the fourier spectrum of an image? All I can do is up to here. im= imread('1.jpg'); f = rgb2gray(im); F = fft2(f); What is next? Thank a lot. ... 11 May 2010 08:55

Output small Frequency Clock from a DAQ-Board !!!
Hi, My DAQ-Board is connected to a Sensor, which needs to be Digital clocked with 40 kHz Frequency (ca. 26µs), because my DAQ-Board dont support Analog-Output. I was reading a lot of Documentations from Mathworks and looking around on the Net. But unfortunatly didnt found what I need. Now I figured that I mus... 29 Apr 2010 07:51

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