Matlab

Unreadable coefficients expressed in syms
Dear professionals, I came across this problem. My model has to handle a large number of iterations. I believe the following slows down my efficiency. Essentially, how do I convert the coefficients in large numbers to double/short format while still displaying them in symbolic expressions. Would vpa(sym) work?... 11 May 2010 16:46

import large files
Hi, I'm trying to read in a large excel file to use in a neural network, it is approximately 40 columns by 650,000 rows. After running the m file for a while, I get a "not enough storage" error message. My question is, is there any way to read in a single row at a time? The input file could be either *.xlsx or *.csv... 11 May 2010 19:01

Shortcut bar for Editor
Hi folks, I hope there is somebody who will find this an easy problem: as I was used to enter Matlab Editor directly through a shortcut bar on the pc desktop with an earlier version, I'd like to create one in R2008b too. Any idea? Previously the shortcut was linked to editor.exe, but now I failed to find any such fil... 11 May 2010 17:54

Plotting tiny aircraft
Hello, I've currently created a scatter3 plot with weather data. I have the location of the radar and its field of view plotted over the weather data. My question is, can I place a picture of a tiny aircraft on where the radar is looking within the same plot? ... 13 May 2010 17:08

Few questions related to surf function
Hello Sir or Madam, I am currently plotting a surface using the following code: surf( z, 'FaceColor', 'none' , 'EdgeColor', 'blue'). This code allows me to make a transparent face plot of z as a function of x and y. However, the indices of x and y are not shown. I tried to change the ticks in the property editor... 11 May 2010 15:38

Text Box Transparency Level
Is there a setting similar to "backgroundcolor" that allows you to change the amount of transparency of the text box? We know that setting the color to none gives 100% transparency. Is there something that would allow for 50% transparency, for example? Thanks. AJ ... 11 May 2010 17:54

Loading large csv files
I've tried doing a search but not finding anything that can help me. I'm trying to load several csv files into matlab ranging from 20mb to 2 gb as they contain data from the S&P index for a project i have to do. The data is in this format but if i try to import into matlab using the import wizard, i get an m by 1 matri... 14 May 2010 00:51

multipath rician channel simulink
HI everybody, i'm trying to simulate with Simulink a multipath rician channel according to Sui model (3 taps) but i have some problem. In fact, I obtain a better performance in terms of Ber with k factor [0 0 0] than with k factor [4 0 0] and it is impossible! The other parameters are: Doppler shift LOS compon... 1 Jun 2010 18:37

histogram formation
Sir, I have an image and i am able to create a histogram but if I am applying "double" then the histogram is not in the correct form.What I need to do so that I get the correct histogram ? ... 11 May 2010 14:31

Warning: Warning, solutions may have been lost
Hi! I'm using the following commands to get the simbolic expressions of A1, A1I, A2 and A2I: a=1 eq1='(A1+A1I*i)-(A1-A1I*i)+(A2+A2I*i)-(A2-A2I*i)-Ty(a)/(2*Pi()*i)'; eq2='Srot(1)*(A1+A1I*i)-conj(Srot(1))*(A1-A1I*i)+Srot(2)*(A2+A2I*i)-conj(Srot(2))*(A2-A2I*i)+Tx(a)/(2*Pi()*i)'; eq3='(Srot(1)^2)*(A1+A1I*i)-(c... 24 May 2010 03:40