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Jeff Miller


Last seen: Today Active since 2013

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Answered
Distribute a sum using binomial distribution
If I understand correctly, it is fine to use binornd with n = row total. It sounds like that is what was done in the paper. j...

6 days ago | 0

Answered
Why is fitlm affected by variable scale?
Your understanding is correct for linear regression but your model is nonlinear because of the interaction terms. Consider: zX ...

7 days ago | 0

Answered
understanding Linear regression model equation after simplifying.
I think the notation y~ 1+ x1*x2 is shorthand for y~ 1*b0+ b1*x1 + b2*x2 + b3*x1*x2. The four b values are the four estimates...

21 days ago | 0

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Answered
Is there a way to normalizing a probability density function / keep the density values between 0 and 1?
Dividing by the max density value would have the unfortunate ramification that the resulting function would no longer be a densi...

21 days ago | 0

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Answered
plot of log likelihood values
I think this might be what you are after: x = [2 4 3 1 6 2 2.5 7 10]; % data ShapeCandidates = 1:10; Scale = 6; loglik...

28 days ago | 0

Answered
How can I see specific likelihood values with MLE (or possibly another function?)
Once you have the parameter estimates (e.g., from mle) you can compute the likelihood value by calling your custom density funct...

1 month ago | 0

Answered
Facing an error while using 'anovan' function
anovan needs the original data (y1 and y2) to compute an error term, but you are only giving it the averages (ybar). This is why...

1 month ago | 0

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Answered
Generating random variable from inverse gaussian dist.
Do you really need to write the random generator yourself? This one is already available: >> pd = makedist('inversegaussian') ...

2 months ago | 0

Answered
How do I get MATLAB to display the d' when my hit rate = 1 using the norminv function?
No, d' cannot be computed when an observed hit_rate is 1 or fa_rate is zero. One of the most common work-arounds for this probl...

2 months ago | 0

Answered
How to delete some of anonymous variables randomly?
One way to approach the problem is to write a function f(x) where x is a vector with 47 positions. When you call f, put numeric...

2 months ago | 0

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Answered
Random Laplacian distribution in a specified interval
Here is a quick and dirty way to do this with Cupid: location = 0; % set whatever Laplacian parameters you want. scale = 1; ...

2 months ago | 0

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Answered
kstest for uniform distribution
you can test for the fit of a discrete distribution, including uniform, with chi2gof. One of the examples (about 1/3 of the way...

2 months ago | 1

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Answered
How to remove the outliers in distribution fitter
If you click on the "Exclude" button in the picture you posted, you will get the option to set lower and upper limits to exclude...

2 months ago | 1

Answered
Bootstrap multi linear model
The problem is that fitlm produces a complicated output structure and bootstrp doesn't know what to do with it. x = (1:1000)'; ...

2 months ago | 0

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Answered
How Can I simulate Data for Least-Squares Variance Component Estimation (LS-VCE) for Multiple regression?
You could use mvnrnd to generate random values of x1-x4. Is that what you need?

2 months ago | 0

Answered
How to group data for MANOVA1 analysis
84*84 is not going to work, sorry. For MANOVA, you need to have more cases in each group than the number of variables. Some pos...

3 months ago | 0

Answered
How to test if values are close togather using p-value (ttest)
A small p value means that the data are incompatible with some underlying assumption/model. For example, you could potentially ...

3 months ago | 0

Answered
Finding the minimum of a complicated function with variables and parameters
If I understand the problem correctly, then this should be close to what you want: function bestEsts = MyOuterFn(x,y) MyErrFn ...

3 months ago | 0

Answered
How to get correct p-values for the Steel-Dwass test?
The problem is with the 'inf' value given as the degrees of freedom in this line p_steelDwass(i, 1) = 1 - tcdf(t_steelDwass...

3 months ago | 0

Answered
How to calculate for significant difference between Cohen's Kappa values?
As I understand it, the fundamental question is whether tests A & B agree better than tests A & C, beyond a minor improvement th...

3 months ago | 0

Answered
fsolve doesn't find a solution when the value of the objective function is obtained through a Montecarlo simulation
I don't know if it can be done in the context of your simulation, but sometimes it is helpful to pick the "random" variables sys...

3 months ago | 0

Question


speed up integrating the same function over many overlapping intervals?
I need to compute many different integrals of the same function fn, essentially like this: Xint = size(X); for i=1:numel(X) ...

3 months ago | 2 answers | 0

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answers

Answered
Differences between functions ezfit and Matlab's gamfit in fitting data to the gamma distribution?
There are two somewhat different parameterizations of the gamma distribution. In one (which I think is used by gamfit), the mean...

3 months ago | 0

Answered
How do I calculate the R^2?
Either of these: Rsqr = corr(x(:,2),y)^2; RsqrAlso = 1-(std(resids)/std(y))^2;

3 months ago | 1

Answered
I would like to find elements of a matrix that fulfill a condition but after every loop the condition is changing.
I think this will almost do what you want. edges = 0:0.05:30; [~,~,bin_numbers] = histcounts(diameters,edges); The output bin...

3 months ago | 0

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Answered
Generating a categorical array with group names
Is this what you are after? part1 = repmat({'Name1'},1055,1); part2 = repmat({'Name2'},1641,1); part3 = repmat({'Name3'},2055...

3 months ago | 0

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Answered
Forming a CDF by adding different types of PDF and generating random number
It seems like there are several different questions here. If you want to generate random numbers from a custom CDF, one simple ...

3 months ago | 2

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Answered
Calculating pdf and cdf for data extracted as a table
This command pdfwindspeed = pdf('Normal',A) returns the pdf of the A values within the standard normal with mu=0 and sigma=1. ...

3 months ago | 0

Answered
How to use one data set to find the mean of another?
NON1 = NON == 1; % this makes a boolean vector that is true for the positions where NON==1 mean(PLCm(NON1)); % this computes ...

3 months ago | 1

Question


Request for help computing convolution of random variables via fft
Inspired by the answers of @David Goodmanson to this earlier question, I have been trying to understand exactly how in general t...

4 months ago | 2 answers | 0

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answers

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