Jeff Miller

Last seen: 2 Tage vor | Aktiv seit 2013

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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...

ein Tag vor | 0

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

3 Tage vor | 0

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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,...

etwa 2 Monate vor | 0

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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...

etwa 2 Monate vor | 0

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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....

2 Monate vor | 0

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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...

2 Monate vor | 0

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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 ...

2 Monate vor | 0

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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...

3 Monate vor | 1

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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...

3 Monate vor | 1

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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...

3 Monate vor | 1

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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...

3 Monate vor | 2

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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...

4 Monate vor | 0

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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...

5 Monate vor | 0

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

5 Monate vor | 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...

5 Monate vor | 0

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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...

5 Monate vor | 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; ...

6 Monate vor | 0

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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...

6 Monate vor | 0

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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 '...

6 Monate vor | 0

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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...

6 Monate vor | 0

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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...

8 Monate vor | 0

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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...

8 Monate vor | 0

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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...

8 Monate vor | 1

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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...

8 Monate vor | 0

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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...

8 Monate vor | 0

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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...

8 Monate vor | 0

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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...

8 Monate vor | 0

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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 ...

10 Monate vor | 0

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

10 Monate vor | 0

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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...

10 Monate vor | 1

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Jeff Miller

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