Answered
Calculate Exponetial Moving Covariance
Not really a hand, but maybe some hints...Let's say you have variables x and y, and you want the exponentially weighted rolling ...

2 månader ago | 0

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Answered
Select sample from an array
Maybe this: ints = [2:7:259 3:7:259 4:7:259 5:7:259]; srtints = sort(ints); X1 = x(:,srtints);

2 månader ago | 0

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Answered
Kruskal-Wallis test with very small p-values
p values can be anywhere between 0 and 1, depending on your data. a tiny p value like that is telling you that you would very r...

2 månader ago | 0

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Fitting a multivariate Gaussian distribution on a histogram
There isn't really a universal answer to "which distribution fits best", because there are an infinite number of different distr...

2 månader ago | 0

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Answered
How to index through variable list in a table after doing calculation with each variable
myVars = {'Var1name' 'Var2name' 'Var3name'}; % list the names of the variables you want for iVar=1:numel(myVars) thisColu...

2 månader ago | 1

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How to obtain the standard error for each of the fitted parameters
The notion of a standard error assumes some kind of random sampling. For example, the standard error of your 'b' parameter refl...

2 månader ago | 0

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sqlite foreign key constraint not enforced
In case anyone else is interested, here is the answer from MATLAB technical support: This [is] a bug in executing PRAGMA querie...

2 månader ago | 0

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Weird fitting result from using 'ksdensity'
Try histogram(x,'Normalization','pdf')

2 månader ago | 0

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Answered
How to plot a spatial correlation with a p-value threshold?
After you get X (bottom of your first code segment): rCrit = 0.312; % Based on N=40 and alpha = 0.05, 2-tailed, from a table of...

2 månader ago | 0

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Answered
double truncated data sample
This is pretty ugly, but I think will do what you asked for: function [x]=generate_sample(n,eta,beta,theta,t1,t2) % ...

3 månader ago | 0

Question

sqlite foreign key constraint not enforced
My question is how to get MATLAB's sqlite databases to enforce foreign key constraints. Here is a minimal working example illus...

3 månader ago | 1 answer | 0

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Answered
How to use least square fit in MATLAB to find coefficients of my polynomial?
% It sounds like you have data arrays like these: nPoints = 100; H = rand(nPoints,1); C = rand(nPoints,5); % If so, comput...

3 månader ago | 1

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Answered
How to remove effect of "in" predictors on "out" predictors in stepwiseregression?
One way to think of it is that the "out" predictors will only improve the fit of the regression model if they bring in some new ...

3 månader ago | 1

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How to fit data in exponential fit (R = exp(-q*D)) and find coefficient "q" using Maximum Likelihood Estimate (MLE)?
As I read this question, it is about fitting a model rather than a distribution, so I don't think mle is appropriate. Instead, ...

3 månader ago | 0

Answered
Multivariate analysis of variance in Matlab
You need to arrange your data in a table with one row per individual group member. For example, your first group seems to have ...

3 månader ago | 1

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Answered
Selecting a "random" element from an array with each element having it's own weighting
% Wts is your vector of weights. Wts = Wts / sum(Wts); % make sure they sum to 1 cumPrs = cumsum(Wts); % cumPr is the cumula...

3 månader ago | 0

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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 månader ago | 0

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Answered
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 månader ago | 0

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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...

3 månader ago | 0

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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...

4 månader ago | 1

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Answered
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...

4 månader ago | 1

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Calculate Nakagami m parameter using the mle function
I think the minimum change you need is fast_fading=fast_fading(filtersize:end); fast_fading = fast_fading - min(fast_fading); ...

4 månader ago | 0

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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...

4 månader ago | 0

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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 ...

4 månader ago | 0

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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...

4 månader ago | 0

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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 ...

4 månader ago | 0

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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...

4 månader ago | 0

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Answered
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...

4 månader ago | 0

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

4 månader ago | 0

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Answered
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...

4 månader ago | 0

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