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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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Responded

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

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

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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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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

Tideman Tideman (n.) - a person who makes himself feel better by attacking the character of others.

2 years ago | 1999 views

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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

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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

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

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

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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

Matlab community is letting me down ...

2 years ago | 1999 views

Posted

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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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

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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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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

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