Matlab

Find doesn't find.
Here a simple, annoying problem: qmax=6; Q=[-qmax:2:-2,-1:0.4:1,2:2:qmax]' Q = -6.000000000000000 -4.000000000000000 -2.000000000000000 -1.000000000000000 -0.600000000000000 -0.200000000000000 0.200000000000000 0.600000000000000 1.000000000000000 2.000000000000000 4.000000... 10 Aug 2010 11:20

Reading a PDF file
Hi! Is it possible for matlab to read PDF files? i've seen a couple of m-files in file exchange that extracts text, is it possible for matlab to extract an image? sorry, i just started using matlab. thanks in advance for your insights and/or ideas. :) ... 10 Aug 2010 19:07

skip characters while reading files
So I have some files that I want to read all with 'sprintf'. If those files are named test1.txt, test2.txt, test3.txt... then I have no problem using for k=1:n sprintf('c:/folder/test%d.txt',k) But if my files are name like text_0001.txt, text_0002.txt, and so on, I have not figured out away to use sprintf functi... 12 Aug 2010 16:58

matrix-vector vs. vector-matrix multiplication
I=eye(3); x=[2;-1;7]; A=I*x (possible) A=x*I (impossible) does this means that multiplication of matrix with vector is possible but vic-vice-versa not? Both in matlab ans maths? ... 10 Aug 2010 10:13

"Minimal" boundary polygon given random points in the plane
I'm seeking Matlab code (or even an algorithm) to generate a boundary polygon whose vertices are a subset of a given set of points, randomly located in the plane. My actual example is a set of locations sampled fairly finely within the continental united states. I would like to obtain a boundary curve from this s... 10 Aug 2010 15:48

PWM Based on Duty
Hi, I need to generate the PWM based on the duty cycle. I have duty cycle value varying from -0.499 to +.499. I have generated the duty based on the system logic and I want to generate the PWM based on this duty. I am not using Simscape. I would like to know how to generate this from simulink or matlab. Tha... 10 Aug 2010 10:12

Plotting a graph in simulink
Dear all, I am building a MIMO model using simulink. The channel model is fading with AWGN block (with a particular value of Eb/N0), for each time I run the program, I have one BER result (on BER Display). Now I wanna plot a graph to show BER against Eb/N0, That means I need to calculate a range of BER corresponding t... 10 Aug 2010 10:12

Grouping Data
Hi all, I know that [n xout] = hist(vars, thresholds) will give me a frequency for each group. However, what I want to do is slightly different. I have a 2 x many matrix of assosiated values. I want to group the data in column two according to which range of values it's column one value is. eg. vars= [1 3 2 ... 10 Aug 2010 10:13

Using fprintf to print part of a filename....
Hi all, I'm having some problems with fprintf function. I have a loop where some .dat files are generated into a specific directory, and my goal is to create a input.txt file that has in each line the names of the diferent .dat files created. Something like: input.txt: 1.dat 2.dat 3.dat 4.dat .. .. .. ... 10 Aug 2010 14:41

waitbar/processbar with windows, always on top
Hello matlab's partners! Well, the problem it's not easy, at least for me... I have a GUI with a lot of calculations, and i want to put a waitbar or a progressbar (getting from http://blinkdagger.com/matlab/matlab-gui-tutorial-progress-status-bar/), I dont care if one option or the other. This is the appearance for wa... 12 Aug 2010 16:59