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Jeff Miller


295 2013 年以降の合計貢献数

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How can I introduce a known autocovariance to a lognormal process
You should be able to do it by generating your sequence one element at a time, if you can't find a canned routine that will do i...

約7時間 前 | 0

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How to calculate the conditional proabability?
Crude, but maybe illustrative: all=readtable('RainTampa.txt','headerlines',31) nonzeroVar2 = all(all.Var2~=0,:); nonzeroVar2a...

6日 前 | 0

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How to find the maximum of a normalized fit of a histogram
Try this: dist = Histogram(2) maxnorm = max(dist.YData); line([min(dist.XData) max(dist.XData)], [maxnorm maxnorm], 'LineWidt...

6日 前 | 0

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Extreme Value Distribution y-axis not same with Histogram
histogram(total,'normalization','pdf');

7日 前 | 0

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Multiple univariate or multivariate analysis?
No, that's probably not the right way to go. The problem with this approach is that you have a 5% chance of making a type 1 err...

9日 前 | 0

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How to calculate the P-value using chi-square and degrees of freedom
p = 1 - chi2cdf(x,df)

12日 前 | 0

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Is there a way to do a multi normal distribution fitting in Matlab?
The sigma isn't really off. GMModel.Sigma is variance = sigma^2

13日 前 | 0

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Log-Normal fit of histogram
fitdist wants the x values that were tabulated to get the histogram, not the bin counts. From your histogram, it looks like you...

15日 前 | 0

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Parameter estimation - estimate integers only
One way to do this is to write your objective function to return an error function that is linearly interpolated between two int...

16日 前 | 0

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Fmincon: how to change input variable of function which is not a design variable?
If I follow what you are trying to do, one way is by nesting your objective function within some outer master function, somethin...

18日 前 | 0

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How to define the Conditional probability density function from a n-by-2 matrix ?
Maybe start with 'ksdensity' to estimate the joint pdf of x & y from your observed x,y pairs. Once you have a good numerical es...

21日 前 | 0

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Plotting average of many empirical cumulative distribution functions
I'm pretty sure there is no function to do that. To compute the average function by Vincentizing, you first choose a set of CDF ...

24日 前 | 0

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Problems with fmincon for design optimization
Hi Soheil, You have posted a lot of information and I certainly have not digested even a large fraction of it (it would take me...

26日 前 | 0

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CDF-vector- 2 random variables
You apparently have a probability for each of the x and y values. So, you can just compute the different possible Ln(Z) values f...

27日 前 | 0

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How create joint distribution of two dependent variables?
I don't think your two questions are equivalent. If you have the two marginal pdfs and the correlation, there are lots of ways ...

27日 前 | 0

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Generate a random sequence with assigned probabiity
Homework? OK, here's a hint: Imagine that you have an array with 8 positions and that you choose array positions randomly (each...

27日 前 | 0

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Multivariate Nomral Distribution Matlab
If you have only those 9 discrete combinations, then you can make their probabilities be any values you want (summing to one). ...

28日 前 | 0

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Multivariate Nomral Distribution Matlab
I don't see anything wrong with what you are doing, but only with your expectations about things summing to 1. In general, the ...

28日 前 | 0

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Choose samples from statistical distribution for fmincon optimization
It is probably a better idea to select the samples randomly and then have fmincon optimize for the given sample. If you must ta...

28日 前 | 0

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How to synchronise inherited properties of class
I would say your UTubeClass should not descend from TubeClass. It's not the case that UTube "is a" Tube, but rather than UTube ...

29日 前 | 0

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Bootstrap Confidence interval Error: "Statistic size 999 for one jackknife sample is not equal to statistic size for the entire data 1000"
The problem is that the output of function m is a vector of 1000 elements for the full sample and it is a vector of 999 elements...

29日 前 | 0

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Monte Carlo Simulation to generate 10,000 data from 100 data.
Here is one way: originalSample = rand(100,1); % You have your own original sample. This is some fake data to use instead for ...

約1ヶ月 前 | 0

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Monte Carlo Simulation Result Tabulation
% rand(2,5) doesn't do what you seem to think. Try this % (with a little extra code that might help you see how to do this in ...

約1ヶ月 前 | 1

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Histogram Fitting in Matlab
First, I suggest you change the histogram plot so that the frequencies are represented by the areas of the different bars rather...

約1ヶ月 前 | 1

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zeros in data for gamma distribution
rain1positive = rain1(rain1>0);

約1ヶ月 前 | 0

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How to add a time limit to response time?
One way is to use GetSecs, which returns the current time. For example, MaxWait = 1.5; % As an example, suppose you want a ma...

約1ヶ月 前 | 0

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Parameters for Frechet Distribution
You could write a function to compute -log(likelihood of your data) from alpha & beta, then use fminsearch to find the alpha,bet...

約2ヶ月 前 | 0

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Convolution of two probability density function
I don't know whether you can do this directly in MATLAB. If not, you can do it using the Cupid toolbox. Here is an example: %...

約2ヶ月 前 | 0

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How can i merge 2 cells with different items
function str3 = mergefields(str1,str2) % Note: Returns the value in str2 for any field that is common % to both str1 & str2. ...

約2ヶ月 前 | 0

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