I was wondering why the method ____ Signal filter(double[] f) Apply the given array as a convolution Filter and return a new Signal. ____ does return a shorter...
It has to, otherwise the array index would go out of bounds: y(k) = \sum_{l=0}^m f(l) x(k-l) In the discrete case, signals only extend over a finite range....
... I've unsterstood the reason why it would go out of bound. Anyway I extended the original signal simmetrically (to avoid discontinuity problems) with a...
If you have a signal of 2N and filter of N, you should get an output of N+1. Is there any known standard/example signal that when convoluted with some...
In addition to what i just wrote, why does the resample method return me a distorted and noisy signal?!? Is there anything wrong with the java code or am i...
I've added a test case for resample() to the cvs. It looks like it works ok. ... ___________________________________________________________ To help you stay...
... And that is the correct size of the result? What if i want to compare it with the original signal? Should I resample it to 2N samples? Or that is not...
... Sorry I didn't understand where u added the test case to... Anyway if u look at the images i posted u can see that the two signal are quite different. The...
Ahhh, I tested EngineerMath.resample(), not signal.resample(). Are you doing out=signal.resample().evaluate()? Because that would involve Cascades and that...
Hi, I'm trying to use the luDecompose method of DoubleSquareMatrix, and am not getting the correct answer to my test problems. I'm hardly a master of LU...
Hi, luDecompose performs the LU decomposition up to a permutation given by the pivot array. That is, the original matrix M is permutated to a matrix M' and...
Hi Mark, I'm always impressed with your quick responses. Unfortunately, I'm one of those people who hit the math wall at long division, and have no idea what ...
Yes, it does. The LU decomposition is often an intermediary step, so the fact that it is permutated (scrambled) usually doesn't matter because you either...
Hi Mark, If it isn't too much trouble, adding the textbook version of LU decomposition to JSci would be helpful. Part of the reason for my editor is as a...
Hi Mark, Seems to work! Thanks. Steve Sinai ... === message truncated === __________________________________________________ Do You Yahoo!? Tired of spam?...
Does JSci have any any kind of linear regression-solving capabilities? I searched through, but couldn't find anything. It's no big deal if it doesn't, as I...
Hi Mark, I found it. Thanks, Steve ... __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam...
I had some problems getting the inverse Fourier Transform to work. I have a Fourier Amplitude Spectrum (FAS) that with increasing positive frequencies, the...
Hi, As the data is increasing positive, increasing negative then you don't need the first initial sort, ie inverseTransform(data), if you want the output in...
Hello, So I found out the issue. Matlab uses -2pi in the transform and 2pi in the inverse, whereas JSci uses 2pi in the transform and -2pi in the inverse...
OK, thanks, I will make a note in the javadocs. ... From: alkottke <alkottke@...> To: jsci@yahoogroups.com Sent: Friday, 25 August, 2006 5:23:42 PM ...
Every square matrix should have its determinant. However, when I use the det() method in class DoubleSquareMatrix, I sometimes get NaN. For instance, if I ask...
Hi; let me first thank you for this great piece of software, I'm enjoing testing its possibilities and learning some Java in the course. Being new at Java this...
Hi: I am interested in sending mathml to Matlab through Java and solving the equations. But matlab inherently doesn't understand Mathml. I have come across the...
Hi: I have my mathinfo of PDEs(Partial Differential Equations) and ODEs(Ordinary Differential Equations) in mathml. Can this be parsed using the existing Jsci...
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