Matlab

Optimization using Heaviside function
I try to run a one-variable optimization of a function that makes use of the heaviside function. I have: Q={700 if x(1)<5, 600 if 5<x(1)<10, 200 if 10<x(1)} or using heaviside functions, Q=700-100*heaviside(x(1)-5)-400*heaviside(x(1)-10) also I have P=100+100*heaviside(x(1)-6)+400*heaviside(x(1)-13) bound:... 16 Jun 2010 06:40

Spectrogram/FFT Frequency Resolution
When computing the Power spectrum from the spectrogram or fft functions, the frequency range is in integers. Our situation is that we are running [S,F,T,P] = spectrogram(...) with a sample rate of 1kHz. By hand we computed the most prominant oscillation in the signal to be 8.3Hz. However, the power spectral density ... 13 Jun 2010 12:41

xor example not working
Kindly tell me why the original image is not coming with this code. The resulting image receive is yellowish in color,instead of being similar to the image Img_new Img=imread(&#8216;lena_color.tif&#8217;); Img_new=rgb2gray(img); Send=zeroes(size(Img_new); Receive= zeroes(size(Img_new); Mask= rand(size(Img_new); ... 13 Jun 2010 12:41

Grouped barplot with two axes
Thanks Jens and Steve for solving the problem. I stumbled in the same question and found the answer here. In order to ease the task for the next "seeker", I just would like to add a final summary. In brief: if you want to have errorbar(x,y,e1) on the left axis and errorbar(x,z,e2) on the right axis, just define ... 13 Jun 2010 11:33

Need help on Simulation Stop.
Hello. I have a small problem with a basic Simulink module. I have put together a system where I receive data from a C++ client through UDP. I have used the udpip S-function blocks from here: http://www.mathworks.com/matlabcentral/fileexchange/12021 I also have a STOP Simulation block that is enabled after... 13 Jun 2010 10:28

replace one char using its index
"Meedo " <mohabedalgani(a)yahoo.com> wrote in message <hv204k$huk$1(a)fred.mathworks.com>... Hi, How can i replace a char by another one using its index. e.g. s='matlab' s1='a'; s2='A'; How to replace only the first a (index 2 in the s string) with A, to be ans= mAtlab Doe... 13 Jun 2010 08:16

PROBLEM WITH IMPORTIND DATA FROM EXCEL
I have the cancer dataset downloaded from UCI repository I saved the data in excel format on opening the data using (xlsread) function in matlab i found that the data was multiplied by factor this happened because the some colums with very large numbers and others with very small number I dont know what to do in orde... 13 Jun 2010 12:41

reading multiple images in matlab
"hello kaur" <sukhsidhu06(a)gmail.com> wrote in message <hv2fhm$6vp$1(a)fred.mathworks.com>... hi , thanks for reply . plz help me my problem is i have n number of images of same size in a folder . i want to read these images in a matrix of x*y*n . where x is width of image , y is height of image and n is no. of ... 13 Jun 2010 08:16

3d equation
i have x,y and z all are column vectors of equal size.i want an equation such that z=f(x,y).please help ... 13 Jun 2010 12:41

reading multiple images in matlab
hi , thanks for reply . plz help me my problem is i have n number of images of same size in a folder . i want to read these images in a matrix of x*y*n . where x is width of image , y is height of image and n is no. of images . so that at n=0 we have 1st image , n=1 we have 2nd image and so on.... it will look like... 13 Jun 2010 08:16