Matlab

suppressing plots
Hey all, I am very novice, Matlab is the program they are using to teach my Intro to computer programming course. But I have a question that I can't seem to find an answer to. If one is catching plots with getframe for an animation, - is there a way to suppress the plot so the movie doesn't play first at an awk... 29 Apr 2010 19:13

average on a circle
Hi all! I would like to ask you if you know, given a 2D matrix, how to calculate the average value over the data which are on a circle of a certain radius r from the center of the image or any other given pixel the user would select as a center of his data. Note: I don't care at all (since I have many points and ... 3 May 2010 13:09

pcolor plot refresh
Hi all! I have this problem. I use pcolor to plot the data of a 2D matrix. After that, I have a for loop and at each iterations I apply some modifications to the 2D matrix of the previous step. I would like the pcolor plot to update each time I change the data, without the need to close the figure and open a new one... 29 Apr 2010 22:34

FFT DNA
having a genomic sequence "S" that I read and coded into a digital signal " Sig ", now want to apply a centred fast fourier transform (fft) to this signal but I did not know how to choose the sampling frequency ... 29 Apr 2010 19:13

Matlab OOP (Basic): How to change the local variables
Hi I'm trying to learn Matlab OOP and started out implementing a simple digital-filter. Now, I have a class that does the filtering and the memory of the filter is contained within the class and is updated whenever a new filter output is computed. The filter object is called in a for-loop for every sample iterat... 30 Apr 2010 12:50

Polynomial roots
I'm trying to find the roots of 100 random polynomials of degree 5 and I need help with finding the roots. I know that I can gernerate 100 polynomials by using x=rand([100 6]) I know that I can't do roots(x) because the the i... 1 May 2010 23:05

Using interp1 for timeseries data
Hi, I am trying to do some interpolation of timeseries data (24 hours) over different months but my timeseries are not continous. Here is an example of the timeseries: A= [2007 11 19 0 2007 11 19 23 2008 3 15 0]; I have the data for November 2007 with hourly data, then I have data for March 2008... 29 Apr 2010 19:13

SOLVE 4 NONLINEAR EQUATIONS (HELP PLEASE)
Hello Eveyone, I am trying to get an ellipse passing through the four points I have which are not symmetric. So, I am using the equation (X-Xc)^2/(a^2) + (Y-Yc)^2/(b^2) =1 I have four points which wil go in X and Y of the equation above. Let the points be (a1,b1), (a2,b2), (a3,b3) and (a4,b4).. How do I get ... 30 Apr 2010 19:39

SOLVE 4 NONLINEAR EQUATIONS (HELP PLEASE)
Hello Eveyone, I am trying to get an ellipse passing through the four points I have which are not symmetric. So, I am using the equation (X-Xc)^2/(a^2) + (Y-Yc)^2/(b^2) =1 I have four points which wil go in X and Y of the equation above. Let the points be (a1,b1), (a2,b2), (a3,b3) and (a4,b4).. How do I get ... 29 Apr 2010 16:55

plotting data points with numerical y-axis and a string x-axis
I've got 8 1x2 vectors that I would like to plot. The first value in each vector belongs to the 'x90' category and the second value belongs to the 'xnovib' category. I'd like the x-axis to have two "values".... namely 'x90' and and 'xnovib'. The y-axis will be scaled to the numerical inputs in each of the 8 vectors... 29 Apr 2010 18:04