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Eric Diaz


150 total contributions since 2009

Professional Interests: Medicine, Radiology, BioEngineering, Image Processing, Signal Processing, Statistics, Physics

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Re: How do you fit non-negative exponential decay that is biased
Hi dpb, Yes, the distributions are known to be non-gaussian. The data is non-central Chi distributed, which has a family of su...

11 months ago | 947 views

Question


TroubleShoot FMinSearch with subscript assignment mismatch
I keep getting the following error: Subscripted assignment dimension mismatch. Error in fminsearch (line 190) fv(...

11 months ago | 2 Answers | 0

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How do you fit non-negative exponential decay that is biased with non-uniform noise over time?
I posted a question on the answers forum recently. Unfortunately, my problem remains at large and I can't seem to get in touch w...

11 months ago | 947 views

Answered
How do you fit non-negative exponential decay that is biased with non-uniform noise over time?
If anyone can clarify John's last response or help in replying to my last comment, I would greatly appreciate it.

11 months ago | 0

Question


How do you fit non-negative exponential decay that is biased with non-uniform noise over time?
We often make assumptions when we model exponential decays. The most common assumptions that I know of are, 1) the signal is ...

11 months ago | 2 Answers | 0

2

answers

Question


Does anyone know how to figure out a workaround to avoid computing overflow/underflow/NaN/inf in this algorithm?
M14 = Signal.^14; M12 = Signal.^12 ; M10 = Signal.^10; M8 = Signal.^8 ; M6 = Signal...

1 year ago | 1 Answers | 0

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Re: lsqcurvefit problem
Alternatively, delete your first few data points and try to fit a decaying exponential from the max of your data only.

1 year ago | 1098 views

Responded


Re: How to use the function 'fit' on array of data and create an array of 'fit objects'
Thanks for clarifying that. I think that this sort of information should be put into the documentation for that family of functi...

1 year ago | 2284 views

Posted


How to use the function 'fit' on array of data and create an array of 'fit objects'
The 'fit' function does not seem to be friendly with arrays / matrices / variables. for ii = 1:size(Y,2) fitVar(ii)=fit(X,Y(:,i...

1 year ago | 2284 views

Question


How to use the function 'fit' on array of data and create an array of 'fit objects'
The 'fit' function does not seem to be friendly with arrays / matrices / variables. for ii = 1:size(Y,2) fitVar(ii)=fit(...

1 year ago | 1 Answers | 0

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Responded


Re: Can someone please help?
arich Digging up stuff from four years ago, huh. I don't think I'm far off by saying that some of the "volunteers" on here hav...

2 years ago | 1999 views

Responded


Re: Can someone please help?
Tideman Tideman (n.) - a person who makes himself feel better by attacking the character of others.

2 years ago | 1999 views

Responded


Re: Can someone please help?
Well, I sure as hell wouldn't pay him. He hasn't shown me any reason to think that he would be worth it, and in fact, has given ...

2 years ago | 1999 views

Responded


Re: Can someone please help?
dbp I'm not sure I understood half of the stuff you said at the end. You should really work on trying to use complete sentences...

2 years ago | 1999 views

Responded


Re: Can someone please help?
dbp You're right about MATLAB being very expensive. While I really enjoy using MATLAB, I must say that there are very attractive...

2 years ago | 1999 views

Responded


Re: Can someone please help?
Tideman. What really gets my goose is that ImageAnalyst actually requested that I post a script and example matrix of my data a...

2 years ago | 1999 views

Responded


Re: Can someone please help?
tideman. Maybe. Or maybe you spend too much hypothesizing and too little time helping. Or maybe it's the desire of Matlab's co...

2 years ago | 1999 views

Responded


Re: Can someone please help?
Matlab community is letting me down ...

2 years ago | 1999 views

Posted


Can someone please help?
http://www.mathworks.com/matlabcentral/answers/128133-automatically-trim-remove-crop-black-borders-margins-from-images-volumes

2 years ago | 1999 views

Question


Please explain difference in image variance algorithms ... E-10 for all tests
Can someone please explain why these different algorithms are giving slightly different results for the variance of an image? ...

2 years ago | 1 Answers | 0

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Question


Automatically trim/remove/crop black borders/margins from images / volumes
Is there any way to easily and efficiently automate "trimming / removing / cropping" of "black / 0", "borders / margins" from "i...

2 years ago | 1 Answers | 0

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Answered
What frustrates you about MATLAB?
The only thing that I can really think of is cost. MATLAB is an extraordinary programming environment. I would love to work i...

2 years ago | 0

Responded


Re: Can someone please explain why these different algorithms are giving slightly different results for the variance of an image?
I forgot to change the end index for the "for loops" to nzs in the above posted algorithms. Also, I referenced several websites...

2 years ago | 916 views

Question


Please explain difference in results between these variance algorithms which should be null?
Can someone please explain why these different algorithms are giving slightly different results for the variance of an image? ...

2 years ago | 1 Answers | 0

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answer

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Can someone please explain why these different algorithms are giving slightly different results for the variance of an image?
Load images and get basic parameters %Preinitialize %Algorithm #1 %Algorithm #2 %Test the difference

2 years ago | 916 views

Question


Need help with simulink
I am completely new to simulink and don't know where to start. I would like to create an object with certain intrinsic properti...

2 years ago | 1 Answers | 0

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Re: numpy (matrix solver) - python vs. matlab
Regarding the condition number (K). I'm not an expert but I did put together a presentation with a slide on it. One way of loo...

4 years ago | 12836 views

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