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How to define a cumulative distribution function with variable in it
If you need to use Symbolic Toolbox sym variables, then you may want to use the erfc function in place of normcdf. Consider this...

13年以上前 | 0

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correlation should be less than or equal to 1 but in my case it is exceeding,so give me a solution
In general, unless there is something special about your problem, it is perfectly reasonable for rmse to be larger than 1. It's ...

13年以上前 | 0

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Labeling Dendrogram Plot x-axis
You can try this: > [h,nodes,orig] = dendrogram(clustTreeEuc,0); >> orig(1:5) ans = 102 143 114 122 115...

13年以上前 | 0

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Make the data tip ignore superimposed plot data
If h is a handle to the plot line, I'd expect set(h,'HitTest','off') to do what you want. Not 100% sure, but give it a try.

13年以上前 | 0

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Using Gumbel distribution to calculate extreme events.
If you have the Statistics Toolbox, take a look at "help evfit" and pay particular attention to the statement at the bottom abou...

13年以上前 | 0

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Does anyone know how to create a custom distribution?
You have a four-parameter distribution with density (1-p)*normpdf(x,mu,sigma) + p*exppdf(x,lambda) and with a cdf that i...

13年以上前 | 0

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What sort of support elements does naive bayes classifier need?
If you are referring to NaiveBayes.fit and its 'KSSupport' argument, then you can omit this in most cases. You would specify it ...

13年以上前 | 0

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ANOVAN: Undefined function or variable "denommat"
I agree this looks like a bug where if you specify a variable as random but it doesn't actually appear in any terms, the code ge...

13年以上前 | 1

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Principal Component Analysis (Princomp)
Are there just some columns whose signs differ between the two SCORES matrices? That can happen as a result of a change in svd o...

13年以上前 | 0

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How can i include the fitted model and goodness of fit into my regression analysis plot
Try something like this: load census [fitresult,gof] = fit(cdate,pop,'poly2') plot(fitresult,cdate,pop) text(1800,...

13年以上前 | 0

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different cdf plot produced by 2 different code
When I try your commands after rng(0) data = 150 + 10*randn(200,1); bin = 100:10:250; I get the same cdf curve in ...

13年以上前 | 0

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cell array to dataset: the use of cell2dataset
I can't tell what ds is when it gets passed into cell2dataset. This, for example, works: >> ds = [{'name1';1;2;3}, {'name2'...

13年以上前 | 0

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How to measure the quality of regress?
I find it hard to picture exactly what you want. You have several groups of variables, but the same Y variable each time? In tha...

13年以上前 | 0

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why is LinearModel.stepwise() so much slower than stepwisefit() ?
The stepwise method in the LinearModel class is written to make its selection using any of a variety of measures. Also, it consi...

13年以上前 | 0

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rectify error in kmeans
The kmeans function has an option 'EmptyAction' that you could try. With this option you can request that, if a cluster becomes ...

13年以上前 | 1

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why regstats give an error when I try to build a quadratic model
The warning is just an indication that the significance of the Durbin-Watson statistic is outside the range of a table of exact ...

13年以上前 | 1

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Setting weights for robustfit command.
If you want to specify the weights yourself, I recommend using glmfit or LinearModel instead of robustfit.

13年以上前 | 0

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returning p-values when using lscov function
If you want p-values for each coefficient, then t is the coefficient estimate divided by its standard error (both returned by ls...

13年以上前 | 0

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K-nearest neighbour Classifier- Cross validation
This example illustrates k-fold cross validation for knn classification: <http://www.mathworks.com/help/stats/classification-...

13年以上前 | 0

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How to fit data to a Gaussian distribution
Similar question in the newsgroup: <http://www.mathworks.com/matlabcentral/newsreader/view_thread/325685>

13年以上前 | 0

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Why histfit cannot fit my data very well?
Try fitting the 'gev' (generalized extreme value) or 'tlocationscale" (location/scale shift of the t) distribution.

13年以上前 | 0

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Large datasets: Any way to perform regression analyses on select variables within a large table based on row name?
If you have the Statistics Toolbox, you might find it handy to use "dataset" to read in the csv file and create a dataset array ...

13年以上前 | 0

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Nonlinear fit to multiple data sets with shared parameters
Take a look at this example of a function that partitions the parameters into a set sharing values across all datasets and a set...

13年以上前 | 6

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boxplot insists on removing outliers, is there an option to disable outlier removal?
Can you explain more about what you want? Ordinarily the boxplot doesn't remove outliers, but instead shows them as separate mar...

13年以上前 | 7

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how to improve the precision when using the cumulative density function
This may be too elaborate an answer, but it's all I have. You are computing the probability of falling into a rectangle. If t...

13年以上前 | 0

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gmdistribution.fit and gmdistribution help needed
I don't know if your code is correct, but: 1. The text seems not to declare that the covariance is diagonal, and does use not...

13年以上前 | 0

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Chi-square test with 2 bins, why do I get P = nan ?
The default for chi2gof is to test against the normal distribution, estimate the parameters, and deduct the number of estimated ...

13年以上前 | 0

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Aggregation by Multiple Grouping Variables (With Custom Circular Mean Function)
For your simpler example with the hospital dataset, you can do this: grpstats(hospital,{'Sex' 'Smoker'},'mean','DataVar','W...

13年以上前 | 0

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Why data cursor showing wrong values?
Try this instead: set(gca,'YDir','reverse') Your way retains the y tick locations and values, and just labels them with ...

13年以上前 | 0

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Why there is difference in standard deviation calculated by normfit and dfittool with normal distribution?
I don't know anything about images. In general, to calculate the standard deviation related to a histogram of data in a variable...

13年以上前 | 0