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The Treebagger give different results in 2012a and 2013a
This might be the explanation, and it includes a suggestion of how to avoid the problem: http://www.mathworks.com/support/b...

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Confidence Interval on the mean curve (SSANOVA)
I'm having trouble understanding the code you wrote. Perhaps you can figure out how to compute the mean and std for each grou...

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Arranging data for test of statistical significance from multiple subjects
It sounds like you have a univariate rather than multivariate problem. So anova1 rather than manova1. You have two choices. F...

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Maximum Likelihood Estimation for custom distribution
Here are some tricks to help debug this sort of thing: makedist -reset % will cause MATLAB to revisit your fil...

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Obtaining standard deviation in cftool
The thing labeled RMSE is the root mean squared error. It's an estimate of the standard deviation of the residuals or error term...

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error message using polyfit (nonlinear regression)
There was a time when this function issued an error asking you not to have repeated X values. But the new error message is more ...

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K- Means clustering problem
Try "help hold" to see how to make plotting commands stop overwriting previous figure contents.

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k-means - missing to plot some data points
I think they're just clipped at the boundary of the plot. Try adding this: xlim([.9 3.1]); ylim([.9 8.1])

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How to create a boxplot from a PDF?
The boxplot shows the median, lower quartile, and upper quartile. You may be able to calculate these for your pdf. For example, ...

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2-way random effects ANOVA exceeded maximum variable size
It wasn't clear from the original post that the 14879 values were all different. I don't really need to see the actual data, ...

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classification/ Discriminant analysis functions
I don't have your data. I suspect you need to define train_set and test_set to have only the data without the class labels. Then...

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How to set bounds for coefficents when fitting a second order Exponential?
Type "help fit" and you'll see the fourth input can be a fitoptions structure. Then type "help fitoptions" and you'll see you ca...

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Using fit 'exp2' an error with "weights"
Since you didn't specify weights, it seems like the NaN value must be in either x or y. You can find the usable values (using yo...

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Problem using nlinfit . The code works with a random model function that I found on the web, but not with my model functions
It looks like you want "1./exp(...)" in place of "1/exp(...)" so you get the reciprocal of each element instead of a matrix divi...

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How to obtain trend p-values for each cell of a matrix?
You are right that regstats returns a structure, but it contains numeric values that you can assign into a matrix. For example, ...

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gplotmatrix problem in GUI
The gplotmatrix function plots into multiple axes (a rectangular array of them), so I don't see how to make sense of asking it t...

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Interpretation of Kernel Density
I suggest the best way to verify this is to write the equation that you expect and check that ksdensity does what you want. A...

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nlinfit using 3D coordinates
I like your reasoning for using nlinfit. I see two issues. First, use ".^" instead of "^" in your expression, because you wan...

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Curve fitting to get gamma curve parameter
I'm not sure what you mean by a gamma curve. If you mean a scalar multiple of a curve with the same form as a gamma probability ...

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why do I get zero likelihood!
Are you using the Statistics Toolbox mle function in combination with the Optimization Toolbox fmincon function? Can you try com...

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Testing equality of two coefficients of the same model within two sub-sample (Wald test)
There is a linhyptest Statistics Toolbox function that may help. It requires a vector of coefficient values and a matrix of thei...

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I have one binary response variable and 5 nominal predictor variables which take values (strongly agree, agree, neutral, disagree, strongly disagree). I want to obtain coefficient matrix using logistic regression. Please help.
Make sure Y and var1,...var5 are column vectors.

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Warning: Negative data ignored
Could you have already had "hold on" in effect for a plot with log axes? The following commands illustrate what I mean: sem...

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A question regarding mvnpdf
I'm not sure if the separate Sigma/lambda values correspond to the separate rows of u_t. If they do, here's an example where sup...

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to find cosine fit and residual ?
It appears you start with x and y taken from columns of AC, so they are the same length. Then when you call smooth you pass only...

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Combining standard errors of fit parameters
The standard error is an estimate of the standard deviation of the estimator in repeated sampling. The square of the standard de...

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Find out seperate results from Confusionmat
If I run this code: load fisheriris x = meas; y = species; yhat = classify(x,x,y); [cm,order] = confusionmat(y,...

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how can I create a plot with box the density function of a normal distribution and a log normal distribution
You could simply use the normpdf, lognpdf, and tpdf function to compute these densities, and plot the results together. If yo...

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Integral of a product between a function and a Cumulative Normal Distribution
You didn't really explain what you tried. Here's an example that works: quad(@(x) x.*normcdf(x),-1,1) If I use matrix mu...

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how to save decision tree view (classification tree viewer) ?
On Windows at least, choose "Save As" from the File menu. You can save a .fig file, but also various graphics file types.

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