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Jeff Miller


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445 total contributions since 2013

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Answered
Average of Column Values with Condition
if your data are in a table, maybe you can use grpstats something like this: tbl.IntDepth = trunc(tbl.depth); % assuming depth...

4 hours ago | 0

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2-way-anova with balance over subjects
Look here for an explanation of how to do a repeated measures ANOVA with the same 2x2 within-Ss structure.

2 days ago | 0

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How to choose a sample of these input permutations?
Here's one possibility: Start by making a histogram of the "Difference in VAF" (DVAF) scores. Divide this histogram into k equ...

3 days ago | 0

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Defining class methods in the "deeper levels" of a class
A toy example might be needed to make it clearer what you are after, but I guess you want a class A which has as two of its prop...

4 days ago | 0

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Kahneman's Taxi problem
Generate a cab of one color or the other with the appropriate probabilities. Get the color ID response from the witness with th...

7 days ago | 0

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Generate a random matrix with 4 specifik values
maybe this? j = 2.5; % insert whatever value of j you want to use vals = [1,-1, j, -j]; pos = randi(numel(vals),15,10^5); r...

7 days ago | 0

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Error when running a repeated measures ANOVA
I'm pretty sure fitrm expects all of the data from a single patient to be on one row of the input data table (e.g., words)--at l...

8 days ago | 0

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Error when calling a jupyter notebook file from matlab
Just guessing here, but given that it is a file not found error, maybe you need to specify the path to the input file, something...

19 days ago | 0

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Several questions regarding distributions
I don't know that there are definitive answers to any of your questions, but here are some thoughts: > most of these distributi...

19 days ago | 1

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Multiple functions inside one .m file
Try the method involving static classes, as explained here by per isakson

28 days ago | 0

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Answered
Removing highest and lowest 5% of data as outliers using prctile
% Data values are in X; X2 holds remaining values after outliers removed Y = prctile(X,[5,95]); X2 = X(X>Y(1) & X<Y(2)); % ma...

29 days ago | 0

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Answered
Compare Fit of two linear models
A quick and dirty solution is to form a new variable S=IV1+IV2; and then compare the fit of the model 'DV~S' to the model 'DV~...

29 days ago | 0

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Alternative for two way anova
One option is to ignore the problem and do ANOVA despite the non-normality. ANOVA is pretty robust with respect to normality vi...

1 month ago | 0

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How can I fit a flexible distribution to a set of percentiles?
A normal distribution fits very well: see attached for a figure and the matlab code to generate it. There is no obvious skew (5...

1 month ago | 0

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Plotting a line representing Spearman's correlation on a scatterplot
I'm not sure a mismatch between slope and correlation is necessarily a problem. Note that the slope doesn't equal the correlati...

1 month ago | 0

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How to exclude data when fitting an exponential distribution
You can make use of the memory-less property of the exponential here--the mean remaining time is independent of how much time ha...

1 month ago | 1

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Can MATLAB Handle a Triple Nested Struct?
Haven't tried it, but it seems like this should work: for i = 1:length(Calendar) for j=1:12 Calendar(i).Month(j)....

1 month ago | 1

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setting up a nested data structure
Your information architecture diagram doesn't look quite right. For example, your [Females] should be a structure that holds hei...

1 month ago | 0

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Answered
Distribution Fitting Tool - finding of best fitting distribution type
It depends on exactly what you mean by "best fitting curve". In general, there is certainly no guarantee that the best-fitting ...

1 month ago | 0

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Answered
Obtain a random number from a truncated normal distribution
You seem to be asking for something like this: pretruncMean = 0.9; pretruncSD = 1; untruncated = makedist('Normal',pretruncMe...

1 month ago | 1

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Answered
Constrain regression coefficients to be equal
Make a new variable with IndependentSum = Independent1 + Independent2; and then fit the model with Dependent~IndependentSum

1 month ago | 0

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How do I make a probability plot with data on the y axis and probability on the x axis?
Something like this: % some random data for an example nSample = 500; floodData = rand(nSample,1); % percentiles/probabili...

2 months ago | 0

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How to calculate random Correlation Pairs
Make a matrix A with one column for each voxel, and then use cormatrix = corrcoef(A) The output will be the correlations for a...

2 months ago | 0

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How to calculate a transformed distribution in Matlab?
Depending on the transformations you have in mind, you may be able to do what you want with Cupid. It's transformation distribu...

2 months ago | 1

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Chi square test: non parametric
It sounds like this is what you want: % Create some fake data to use as an example, % with 3 groups of different sizes; score...

2 months ago | 1

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fitglme error says data is not full rank, but it is.
I'm guessing: (1) your ID column is a unique identifier rather than an actual numerical predictor value, and (2) you only have o...

2 months ago | 0

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How can i speed up my nested for loops ?
You can speed this up to some degree by rearranging the order of your for loops. For example, consider: d1 = floor((n1*x/c)...

2 months ago | 0

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mvncdf - invert sum direction
(1) There is no way to get mvncdf to be larger at (6,7) than at (6,13). (2) It might be useful to you to reconceptualize X2 as ...

2 months ago | 0

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Answered
y-axis meaning using a ksdensity plot
The y-axis is scaled such that the total area under the density is 1. (area = probability with continuous distributions.) Since ...

2 months ago | 0

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Answered
How to setup a Repeated Measurements. model and then perform a Manova
tbl = readtable("libro6.xlsx"); % Remove control group control = tbl.Exp_Group == 9; tbl(control,:) = []; % Define & fit...

2 months ago | 1

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