# Jeff Miller

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**Content Feed**

ANOVA for linear mixed-effects models produces misleading main effects

One common approach in this situation is to rescore x to shift the intercept to a value that you do care about--usually the mean...

10 dagen ago | 1

Alphabet T and L are overlapping in some of the trials in this code for Psychtoolbox. How to resolve this issue ?

I think you have a lot more randomization and complexity than you need. For example, it doesn't matter what order you draw the ...

10 dagen ago | 0

| accepted

ANOVA for linear mixed-effects models produces misleading main effects

In addition to what @the cyclist said, here is another way to look at it: "I always assumed that the stats for the main effect ...

10 dagen ago | 1

fit a log 'raised cosine' distribution on univariate data in matlab

I think the problem is here: y = lograisedcosinepdf(x,mu,s); Since you are plotting xgrid versus y, I think you want y = logr...

12 dagen ago | 0

Three-way repeated-measures ANOVA with no between-factor

It sounds like you are almost there but this isn't right: "given filtered searches for each factor (e.g., data(:, strcmp(gender,...

29 dagen ago | 1

| accepted

Non parametric N-way analysis of variance

No, there isn't one. This isn't actually a Matlab limitation, but rather a statistical one, because there simply isn't a clear ...

ongeveer een maand ago | 0

| accepted

Save a variable during parfor loop

Maybe break up your computations into segments, run the parfor within each segment, and save the results at the of each segment,...

ongeveer een maand ago | 1

| accepted

Linear regression on data with asymmetric measurement error

If you have separate measures of the lower and upper directional error associated with each X value (either empirical or derived...

3 maanden ago | 0

Compute conditional mean from distribution

Another approach: pd = makedist('Lognormal', 5, 0.5); lb = icdf(pd,0.01); % find scores at 1% and 5% ub = icdf(pd,0.05); td...

3 maanden ago | 0

| accepted

Error in generalized linear mixed-effects model with poisson distribution.

I haven't used Poisson models myself, but I thought they required the values of the dependent variable to be non-negative intege...

4 maanden ago | 0

F values come out as Infinity using the anovan function

The underlying problem is that the d.f. for error is 0, which is responsible for the 0 MS error. In essence, there are not enou...

4 maanden ago | 0

| accepted

How to Calculate the Effect Size at p=.05

You can get an answer by computing a confidence interval for the Cohen's d. Specifically, at p=0.05, one end of the confidence ...

4 maanden ago | 0

| accepted

How to locate 'Cupid-master' path on my system

I think Cupid-master is just a folder name that others have used when they installed the files, and you can just addpath to your...

5 maanden ago | 1

| accepted

How to extract 3 Weibull parameters obtained using method of moments

parms = weib.ParmValues; % this function reports back the current parameter values of the weib distribution.

5 maanden ago | 1

| accepted

Compute group statistics when the group definition is an OR of values found in several columns of a table

Maybe reformat the table with stack: T=table([1 1 2 3 3 4]',{'John','Bob','Emma','Emma','Bob','Bob'}', ... {'Emma','','Bob...

5 maanden ago | 0

Writing Matlab Table to File

Try this: str = formattedDisplayText(S); str = erase(str,"<strong>"); str = erase(str,"</strong>"); fprintf(file,"%s",str); ...

5 maanden ago | 0

parfor variable classification issue revisited

Maybe something like this would be helpful, using the wonderful allcomb. idx = allcomb(1:5,1:6,1:7,1:8,1:9); nrows = size(idx,...

6 maanden ago | 0

Create .mat file which appends a variable each time a function is executed

Maybe you can use the function 'matfile' to do what you want. Here is a little example: % This is part of the main program / s...

6 maanden ago | 0

| accepted

Why are pool workers going inactive while many iterations remain?

What you would like is for any free processor to take up any waiting task (me too), but for some reason that's not how it works....

7 maanden ago | 0

| accepted

How to generate a Frechet distribution using Methods of Moments?

Here is how you might do it if with Cupid : %% Example for the 2-parameter Frechet distribution (minimum known to be 0) % M...

7 maanden ago | 0

How can I calculate True positive, False positive, True negative and False negative of real and predicted dataset?

First you need to map your 3 values 1-3 onto just two categories: positive and negative. For example, you might decide to call ...

7 maanden ago | 0

| accepted

Linear Regression with Only Dependent Variables

It sounds like you can get what you want from simply [rho, pval] = corr(matrixA(:,1),matrixB(:,1)) fitlm is for situations wit...

8 maanden ago | 1

| accepted

How to use chi2gof within CUPID

Yes, that is correct. The successive bin probabilities are the differences of the successive CDF values, and the expected numbe...

8 maanden ago | 1

| accepted

Goodness-of-Fit for a best-fitting distribution? (by using CUPID)

There are lots of different ways to evaluate the goodness of fit of a given theoretical distribution to a dataset (see, e.g., wi...

8 maanden ago | 1

| accepted

Fit a statistical distribution to truncated data

If you would like to fit a variety of truncated distributions in addition to the normal, you might find Cupid helpful. For inst...

8 maanden ago | 2

| accepted

Fit parameter to Weibull distribution

The problem is a bad choice of starting values. You will get much better parameter estimates with params = mle(A,'pdf',customp...

9 maanden ago | 0

| accepted

Using Psychtoolbox KbCheck() functions, how can I test for a renewed keypress?

One approach is to check timeSecs. This will be very small if the key is continuously held down from the previous trial, but pre...

9 maanden ago | 0

| accepted

How can I make heatmap scale fixed?

e.g., h1 = heatmap(); h1.ColorLimits = [0 1000];

10 maanden ago | 0

| accepted

Simple function for obtain a T statistic from sample mean, stdev & hypothetical mean

Here you go: t_observed = (sample_mean - hypothetical_mean) / sample_sd * sqrt(n); n is the number of scores averaged to get t...

10 maanden ago | 0

creating standard error of mean for bar graphs in code, can you please correct/modify/help my code?

Hard to say for sure without knowing what the original data were, but that doesn't look right to me. Can you explain how the va...

10 maanden ago | 0

| accepted