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please help me
hi...i am beginner at matlap.....there are a problem that i couldn't solved it the problem is Generate the following sequence: V=1 4 9 16 25 ………………………………… 16 9 4 1 Where V is a sequence of length of 49 elements. ... 4 Jul 2010 22:04
Semilog Boxplots?
Hi, Is there a way to create semilog-boxplots? i have for x discrete frequencies from 1 to 1000000, and some measured values for each frequency.# thanks Brezi ... 4 Jul 2010 19:54
contourf, specify regions in image
Hello, I'm a new matlab user that's using contourf extensively for histologic blood cell analysis. Basically I take the contourf of a microscopy image and set the number of levels to 5. Individual cells are seen on the image as a series of contour regions against a blue background (the region defined by the lowest c... 5 Jul 2010 11:04
Tricky 3D array Vectorization?
I have a 3D array part of which is provided below. I want to find the max value in col #1 and return the associated value in col #3. I can do this sequentially using a loop but at 100,000 arrays it takes a long time. Can this operation be vectorized? I am using Matlab R14 on Win2K with 2GhZ Athlon and 2 GB RAM. ... 17 Jul 2010 14:08
Tricky 3D Vectorization?
I have a 3D array part of which is provided below. I want to find the max value in col #1 and return the associated value in col #3. I can do this sequentially using a loop but at 100,000 arrays it takes a long time. Can this operation be vectorized? I am using Matlab R14 on Win2K with 2GhZ Athlon and 2 GB RAM. A... 4 Jul 2010 16:39
Automatic Pixel Values Finder For Any Given Input Image (withtwo black points)!
Siddharth Magazine wrote: Hi there. I have a big problem, i have got an input image on Matlab, i am trying to find a matlab command which can help me to find the pixel values of two black points in the image automatically after running the program, and then after finding the pixel values, it should put a... 4 Jul 2010 13:21
regexprep tokens
"us " <us(a)neurol.unizh.ch> wrote in message <snip> why waste precious time on second guessing with a poster who has no clue what he/she wants let alone is able to express him-/herself concisely... us Good question! / per ... 4 Jul 2010 13:21
ttest2 with samples of unequal variance
Hello all, I had the task of doing some basic statistical analysis using ttest2. I happened to remember that the "default" or original t-test assumes equal variance - http://en.wikipedia.org/wiki/Student's_t-test#Unequal_sample_sizes.2C_equal_variance And in case it's unknown if the variance is equal or unequal, ... 5 Jul 2010 17:45
remove alternate elements in a vector
"shahnaz fatima" <shahnaz1981fat(a)gmail.com> wrote in message <i0q834$svi$1(a)fred.mathworks.com>... can u tell me what does A(2:2:end) = [] mean? how can i ask help for that in matlab. A(2:2:end) Means this: Start with the second element and include every other element after that until the end of the array is ... 4 Jul 2010 12:15
ode113 counting integration steps
Hi, I have this problem: I'm using ode113 with the syntax [t,states]=ode113(@rates,[0,t_final],[initial_conditions],); In the rates function I compute the error by taking the difference between two states I got from ode; i have something like this in the rates function: dydt=rates(t,states) error=states(... 4 Jul 2010 12:15
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