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# Jeff Miller

##### Last seen: 1 day ago
465 total contributions since 2013

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Help fitting data to an implicit equation
I would suggest using fminsearch. The error function to be minimized would be something like: function thiserr = err(x,y,t) ...

3 days ago | 0

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Chi-squared for multiple groups
The crosstab function will do this--it is not limited to 2x2 tables. Example: % Make up example data for 200 participants, codi...

3 days ago | 0

using mle in matlab
One problem is that mle's search function (fminsearch) may try negative parameter values, in which case your pdf function return...

4 days ago | 0

ttest2 with a group describing independent values (statistics)
No, it is not possible to use ttest2 as you suggest. Your design has 2 factors: gender and time (day/night) with repeated measu...

13 days ago | 1

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Generation of Conditional Random Variables
It sounds like the only "free" aspect of your new samples is the new total (say, 241 instead of 240). Once you have that new to...

14 days ago | 1

Calculate Nakagami m parameter using the mle function

15 days ago | 0

Mixed anova design function (unbalanced design)
If the goal of the analysis is to see if the two groups differ significantly in sleep pre-expt, then actually the simplest appro...

17 days ago | 0

model parameter estimation from RMSE between modeled outputs and observations
Something like this. If it is too slow, note that you can use 'optimset' to pass fminsearch options that make it finish faster ...

23 days ago | 0

model parameter estimation from RMSE between modeled outputs and observations
I assume the model is too complex for regression, etc. In that case, you might be able to do this with fminsearch, if there are...

26 days ago | 0

Linear model fit error
Use the transpose operator on x1, x2, x3 and y so that these are column variables, like this for x1: x1 = [7 8 7 8 7 8 7 8 7 8 ...

1 month ago | 0

Randi Error- Array exceeds max array size preference
This looks wrong: OOK=randi(1,sig_length); The first parameter (here, 1) is the maximum random integer (the minimum is 1). Si...

1 month ago | 0

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repeated measure anova two options
Not sure but I think you need T = table([1 2]','VariableNames',{'Time'}); T.Time = categorical(T.Time); % add this line Mayb...

1 month ago | 0

What kind of join will work to merge these two tables
Try T3 = join(T1,T2,'Keys','City')

1 month ago | 0

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derive new variable with random float values using for loop
Despite your comments, I guess you want 0-1 for the second option, not 0-2. I guess you want all numbers in the range to be equ...

1 month ago | 0

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Plot best-fit Spearman rank correlation curve
Tricky question, because the whole point of the Spearman correlation is that the x/y relationship might be nonlinear. Maybe use...

1 month ago | 0

fitting a Gaussian curve convoluted with exponential decay
It sounds like you want what is often called the "ex-Gaussian" distribution. Its density function is on Wikipedia. Cupid will ...

1 month ago | 0

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get discrete pdf/pmf from a kernel distribution pdf on an interval
myFitTrunc = truncate(myFit1,4,12) % 4, 12 are example lower,upper truncation bounds Y = random(myFitTrunc,500,1) histogram(Y...

1 month ago | 0

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Optimising Monte Carlo simulation
Some suggestions--hopefully not a waste of your time: Use the profiler to find out where time is spent, so you can focus your s...

1 month ago | 1

RMSE plot of Monte Carlo simulation
RMSE is not supposed to decrease with the number of iterations, but it should stabilize. Your plot oscillates because each poin...

2 months ago | 1

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Outliers in ANOVA and multcompare
Yes, outliers are included. (Scores are considered outliers only for the purposes of the boxplots.) The way you can tell is tha...

2 months ago | 0

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...

2 months ago | 0

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 months 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...

2 months 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...

2 months ago | 0

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...

2 months 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...

2 months ago | 0

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...

2 months 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...

2 months ago | 0

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...

2 months ago | 1