Community Profile # Jeff Miller

Last seen: Today Active since 2013

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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

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How can I make heatmap scale fixed?
e.g., h1 = heatmap(); h1.ColorLimits = [0 1000];

25 dagar ago | 0

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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

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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...

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...

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...

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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...

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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...

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...

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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...

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...

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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 ...

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problem with the anova calculation
Just change one line to this mdl = fitlm(tbl,'pick~C_t')

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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...

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...

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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...

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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...

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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...

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...

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

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May I ask how I can find 95% confidence interval of skew_FP() from these codes?
LBUB = prctile(skew_FP(),[2.5,97.5]);

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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

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...

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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...

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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...