Math Forum / Math Software / MATLAB / July 2009

Hi
Im running Matlab R2008b on Windows Vista Business, and I seem to be unable to run simulations. I'm experienced in Matlab but new to using Simulink. For example, when I try to run the AC-integrator example found in the help, and run the simulation, I do not recieve an output ...

I have a group of times
B =
13:57:49
13:58:37

I've downloaded a GSHHS shapefile (gshhs_land.shp) with coastline data
from the NOAA and I'm trying to plot a section of coastline defined by
the latitudes y1 and y2 and longitudes x1 and x2. How would I go about
doing this?

I'm almost done trying to build a receiver in simulink with the rf blockset... But my problem is: I am trying to get the decibel level to -130 as my input into my receiver. That's my only problem!! (I don't know why I wrote the rest...)
I can input a signal and get results, but ...

I have a file like this
$GPGGA,060744.20,3825.836891,N,12131.913858,W,2,07,1.2,-3.94,M,-23.15,M,4.2,0210*55
$GPGGA,060744.40,3825.836965,N,12131.913889,W,2,07,1.2,-3.83,M,-23.15,M,3.2,0210*54
$GPGGA,060744.60,3825.836975,N,12131.913890,W,2,07,1.2,-3.83,M,-23.15,M,3.4,0210*59

 can any body help me of how to convert any format of video to avi format
Thanx

i use '-*g' to plot a line out of the points i get in the simulation but it doesn't work. Does anybody know about that bug?
thanks!

I am trying to debug an executable which I'm calling using MATLAB's system command. The method described in:
http://www.mathworks.com/access/helpdesk/help/techdoc/index.html?/access/helpdes
k/help/techdoc/matlab_external/f32489.html
for mex files doesn't seem to work for my ...

dB = 20*log10(Y);
*****plot(range, 20*log10(Y))*****
 [maxY,maxIndex] = max(Y);
 legend(['Max occurs at ' num2str(range(maxIndex))])

I've designed a frequency response (for a bandpass filter) and a magnitude response for a bandpass filter.
Here's the complete code:
Fir.m contains: (frequency response with bode)
clear

Does anyone knows an example ( a demo) on Image Processing Toolbox that makes a projection function to aproximate the levels of gray of an image?
Or a code on File Exchange if anyone dealt with this problem.

hi all, i need some help
i got .txt file consist of ECG signal and i want to plot it in MATLAB, but i don't know how to do it
actually the original file is .hexa and my friend convert it to .txt so it is easier for me to process
here is some preview of the file: (around 800 row)

Hi everyone,
Is anyone having problems with the display of Matlab Central website? (Ratings section on frontpage repeats the same rating, comments on submitted files don't seem to word wrap and go off the page).
I've got these issues on different computers and on both Firefox 3.5 ...

I'm trying to figure out how I can assign a ML session to explicitly use a given number of CPU cores.  For example, if I have 4 cores c1, c2, c3 and c4 and two ML sessions m1 and m2 how can I designate m1 to use only c1 and c2 and m2 to use only c3 and c4.  It seems like ML uses ...

my simulink model exists of:
Const---Gain---Transfer_Fcn---To_File
generating the executable:
set_param('my_model ','RTWInlineParameters','on');