# Jeff Miller

**Statistics**

RANK**87**

of 277 584

REPUTATION**1 604**

CONTRIBUTIONS

**18** Questions

**632** Answers

ANSWER ACCEPTANCE **
83.33%
**

VOTES RECEIVED**179**

RANK**5 800** of 18 781

REPUTATION**190**

AVERAGE RATING**4.70**

CONTRIBUTIONS**8** Files

DOWNLOADS **17**

ALL TIME DOWNLOADS**1764**

RANK

of 128 788

CONTRIBUTIONS

**0** Problems

**0** Solutions

SCORE**0**

NUMBER OF BADGES**0**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

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...

16 dagar ago | 0

| accepted

How can I make heatmap scale fixed?

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

25 dagar 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...

ungefär en månad 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...

ungefär en månad ago | 0

| accepted

Generating correlated data for simulation

One option is to create the second array by adding a random number to each element of the first array. For example sigma = 1; ...

ungefär 2 månader ago | 0

I want to create a QQ & PP plot using L-Moments to fit the GEV but get this error: unable to perform assignment b/c the left & right sides have a different number of elements

Assign the problematic result to a new variable so that you can see what elements it has, like this: temp_var = psi + alpha*(1...

ungefär 2 månader ago | 0

question on repeated measure GLM model

I don't fully understand the design so I won't attempt to answer questions 2) or 3), but I think this is the answer to 1): If '...

ungefär 2 månader ago | 0

How to run the ANCOVA test with categorical covariate in matlab?

It doesn't really make sense to run ANCOVA with a categorical covariate. Instead, think of the categorical covariate as another...

2 månader ago | 0

How can I perform wilcoxon Test with paired samples and vectors of differente sizes?

The Wilcoxon test is for data that come in pairs, so the vectors must be the same size. If you are just missing one score or th...

4 månader ago | 0

Getting a percentile from a histogram

Usually this is done by linear interpolation within the relevant bin. To stick with your 95th percentile example, suppose you h...

4 månader ago | 0

| accepted

A problem in the usage of multidimensional scaling (cmdscale)

You can't cancel that. With only the distance information in D, the mds function has no way of knowing what is up/down/left/rig...

4 månader ago | 1

| accepted

How to integrate a lognormal pdf

It's hard to say for sure without seeing your xx and xxx values, but maybe it is just your expectations that are faulty? Certai...

4 månader ago | 0

Find number of factors for factor analyses

My $0.02 worth: I would suggest running facan with nBasis=8 and checking the resulting scree plot (plot of eigenvalue as a func...

4 månader ago | 0

| accepted

linear mixed-effects model (fitlme) add array variable

I'm pretty sure the predictors have to be single values, so you can't feed in an array as a single unified predictor. You could...

4 månader ago | 0

Using pdf to find threshold

I'm not entirely sure what you mean by "threshold", but maybe you are trying to identify the middle 95% of the distribution? If...

4 månader ago | 0

| accepted

Anova-n outputs as not full rank. Returns NaN P-value.

The short answer is that you have to collect more data to fix this. Look here: >> crosstab(gX1,gX2,gX3) ans(:,:,1) = 7 ...

6 månader ago | 0

| accepted

problem with the anova calculation

Just change one line to this mdl = fitlm(tbl,'pick~C_t')

6 månader ago | 0

| accepted

Can I find likelihood function of an objective function?

A lot depends on the details of these models, but one way to proceed would be in terms of the error scores. Consider the full mo...

6 månader ago | 1

ANOVA result No p-value.

The problem is that the full model has 90 parameters and predicts a separate mean for each of the 3*3*10 conditions. But you onl...

6 månader ago | 0

| accepted

I am having trouble with errors in the array used for anova analysis

Looks like g1 should be a numerical vector, not a cell array (i.e., square brackets instead of curly brackets). e.g., g1 = [1,2...

6 månader ago | 0

| accepted

How to fit lognormal distribution on my data

If the scores are in vector1 and the counts are in vector 2, you could fit like this by the method of moments (should be OK with...

7 månader ago | 0

| accepted

How do I display Tiled Layouts properly?

I haven't used tiled layouts yet so this may be way off-base, but something like the following has solved similar scaling proble...

7 månader ago | 0

How do I calculate the signal to noise ratio of a signal without knowing the noise of the signal?

I'm not sure whether this fits your situation, but one way to estimate the noise is to subtract the average of the epochs from e...

7 månader ago | 1

| accepted

Poisson PMF using MATLAB

This might get you started... k = 0:17; pmf = poisspdf(k,4); figure; plot(k,pmf,'o-')

7 månader ago | 0

| accepted

May I ask how I can find 95% confidence interval of skew_FP() from these codes?

LBUB = prctile(skew_FP(),[2.5,97.5]);

7 månader ago | 0

| accepted

Using a specific number of digits

Maybe by "report k" you are referring to printing it, in which case this should work for k=1:100 fprintf('%03d\n',k) end

7 månader ago | 0

How to computing confidence bounds of the regression model using the bootstrap method

I'm assuming that your figure shows t on the horizontal axis and y on the vertical. The problem is that bootci is giving you co...

7 månader ago | 0

| accepted

How do I update an inherited property in both the SuperClass and SubClass simultaneously in real time?

The superclass/subclass relationship is a little different than you think. When you make SUP and SUB, these are completely diff...

8 månader ago | 0

| accepted

Anova analysis with blocking

You can do this with fitlm as long as you want to test for the effect(s) of interest within a standard linear RCBD model. The h...

8 månader ago | 0

| accepted

Question about "gamcdf" code

To get the 75th percentile value, you need to use gaminv() rather than gamcdf. Also, the shape parameter comes first and scale ...

8 månader ago | 0

| accepted