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Trouble with glmfit using binomial distribution and logit
The error message is because you have N = ones(size(feature)); so it is of the size of the whole feature array. You jus...

14 years ago | 0

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Answered
solving general linear models
The mvregress function comes at this a little differently, but it is possible to set up the problem using mvregress. For this sa...

14 years ago | 0

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solving general linear models
I think you want C = X\Y if you just need estimates, no other statistical information. If not, please explain specifical...

14 years ago | 0

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trouble in signrank function for R2011b ?
This does look like a bug. If you are comfortable editing code in your MATLAB installation, I recommend editing signrank.m to ch...

14 years ago | 0

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How do you obtain a vector of predicted classes generated after cross-valiation of a decision tree?
Consider this: load fisheriris cp = cvpartition(species,'k',10); F = @(xtr,ytr,xtest,ytest){ytest, eval(classregtree(...

14 years ago | 0

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Answered
How to use rbf_kernel parameters with svmtrain() and svmclassify() for svm classification
From your description, it sounds like you intended svmStruct = svmtrain(data(train,:),groups(train),'kernel_function','rbf'...

14 years ago | 0

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Equal probability in 'randsrc(m,n)' in-built function
I have no idea what your function is or if it does things correctly. But from your description you would not expect exactly 1536...

14 years ago | 0

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Fitting a double exponential cumulative distribution function
You can do most things like this by writing a pdf and calling mle: >> x = [exprnd(1,1000,1); exprnd(5,2000,1)]; >> pdf =...

14 years ago | 0

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Answered
Demo Weighted Nonlinear Regression (Statistics Toolbox)
Weighted least squares means we want to minimize sum over i of w(i) * {y(i)-yfit(i)}^2 You can write this by multi...

14 years ago | 0

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Answered
boxplot
This may partially answer what you want. Step 1 would be to take the data for "a" and stretch it out as you describe. Here's one...

14 years ago | 0

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Answered
boxplot
It seems like 1:46 represents your possible data values and [n1 n2 ... n46] represents the frequency of each value. If you "edit...

14 years ago | 0

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Generate random numbers with specific properties
Not all combinations (X,Y) will work of course. If you do not need a theoretical answer, and are content with something that mig...

14 years ago | 1

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Numerical Precision Weak Law of Large numbers
While I don't know exactly what you are encountering, I do know it is sometimes possible to repeat the mean calculation on resid...

14 years ago | 0

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ttest - 2 matrices
Since TTEST wants to work along the first dimension, you can just move that dimension to the front using PERMUTE. Then use SQUEE...

14 years ago | 0

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Random numbers in matlab
Are you sure of the sqrt(N) result? I believe you would expect this if you took the square root of the average squared distance ...

14 years ago | 0

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k-means algorithm: start and replicates parameters
The 'start' parameter defines the starting centroids. The 'replicates' parameter indicates how many times to repeat the clusteri...

14 years ago | 2

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Answered
crossvalind function doesn't work
I'm not sure how you got one toolbox without the other. The Bioinformatics Toolbox is supposed to depend on the Statistics Toolb...

14 years ago | 0

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Why deviance returned by GLMFIT is not = -2*LogLikelihood?
Two things. First, the last argument to binopdf should be the fitted probability, not the fitted counts. Second, the deviance is...

14 years ago | 0

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Answered
Running sfit (or fit) from command line
A good tip in cases like this is to use the "generate code" feature to see what the cftool GUI is doing. If you do that, you'll ...

14 years ago | 0

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Regression/linear equation solving
Bring all the x's over to the left of the equal sign. Then a matrix representation of those equations is this: 1 ...

14 years ago | 1

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K-means clustering, is it possible to get vertical boundaries?
I believe the boundaries are horizontal because the scale of the y variable is much larger. Differences in the y direction domin...

14 years ago | 0

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Answered
Plot title being placed and then erased, and subplots different sizes
Take a look at this: title('main title'); set(gca,'Visible','off') set(get(gca,'Title'),'Visible','on') axes('Oute...

14 years ago | 0

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Answered
calculation of the distances between the features of the same cluster
Distances between pairs of points in cluster 1: squareform(pdist(X(IDX==1,:))) Use something similar to compute distance...

14 years ago | 0

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Kolmogorov-Smirnov Limits on a CDF plot
Try running kstest with a sample of the appropriate size, just to get the fourth output argument. This is the critical value for...

14 years ago | 0

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Stepwisefit regression - additional outputs?
The fifth output from the function is a structure having a .intercept field that contains the intercept for the final model.

14 years ago | 0

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How can i get a bell curve onto a histogram?
You'll need to do is to scale the histogram so that is has area 1.0, so it is comparable to a pdf that you superimpose on it. Se...

14 years ago | 0

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fit a histogramm to a gaussian- or vice versa
One thing you'll need to do is to scale the histogram and bell curve so they have the same area. See my answer to this question:...

14 years ago | 0

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Making boxplot after removing the outliers
A point is declared an outlier based on a comparison of its value with quartiles of the data. If you take out an outlier, you al...

14 years ago | 3

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Answered
Logistic mixed-effect regression example
In that case nlmefit would not be suitable, because it fits models with a continuous response. The glmfit function would be suit...

14 years ago | 1

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Histogram
There is a ksdensity function that can produce a kernel-smooth density estimate. The issue is that it produces a density (integr...

14 years ago | 2

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