Respondida
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...

alrededor de 13 años hace | 1

| aceptada

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

| aceptada

Respondida
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 ...

alrededor de 13 años hace | 0

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

alrededor de 13 años hace | 0

Respondida
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])

alrededor de 13 años hace | 0

| aceptada

Respondida
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, ...

alrededor de 13 años hace | 0

Respondida
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, ...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 2

Respondida
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...

alrededor de 13 años hace | 3

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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, ...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

| aceptada

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

| aceptada

Respondida
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 ...

alrededor de 13 años hace | 0

| aceptada

Respondida
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...

alrededor de 13 años hace | 0

| aceptada

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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.

alrededor de 13 años hace | 0

| aceptada

Respondida
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...

alrededor de 13 años hace | 1

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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...

alrededor de 13 años hace | 0

Respondida
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,...

alrededor de 13 años hace | 0

| aceptada

Respondida
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...

alrededor de 13 años hace | 0

| aceptada

Respondida
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...

alrededor de 13 años hace | 0

| aceptada

Respondida
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.

alrededor de 13 años hace | 0