How can I generate probabilities from a logistic regression?
If you have the Statistics Toolbox, you can fit a logistic regression with |mnrfit| function and then estimate probabilities usi...

10 years ago | 0

how to simulate a markov chain?
From what I gather from you description, this question has already been answered: <http://www.mathworks.com/matlabcentral/ans...

10 years ago | 0

How to Mask the Area other than sky?
One potential method for masking the building in your image is to detect the building edges via the |edge| function. Once you ha...

10 years ago | 0

Is there a matlab function that calculates joint probability for more than 2 random variables ("histc" for more than 3 rvs)?
If you are dealing with discrete random variables, you really only need to use the |accumarray| function. Here is an example...

10 years ago | 1

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Plotting time-course of matrix entries
Extra credit time! Depending on how you want to ultimately display your results, you have quite a few options. For a quick and d...

10 years ago | 0

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Normalized distribution for histogram
If you have the Statistics Toolbox, you might find the |dfittool| distribution fitting tool quite useful. doc dfittool I...

10 years ago | 1

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How can i get the surface plot of 3 variables
You could use the |plot3| command to visualize the data that you have as a single line in 3d space. To use the |surf| or |mes...

10 years ago | 0

How to plot the frequency spectrum in simulink
By default, the "Power Spectral Density" (PSD) block is set to have a sample time of Ts = 0.1 seconds. You should open the PSD b...

10 years ago | 1

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Test trained NARX neural network with new external input
Here is an example from the Neural Network toolbox documentation that you might find helpful: * <http://www.mathworks.com/hel...

10 years ago | 0

Undefined function or method 'markers2' for input arguments of type 'double'
You're calling a function, |markers2|. Since this is not a standard MATLAB function, you should have a file in your directory na...

10 years ago | 0

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You could directly read the *.img file directly into the MATLAB workspace via the |fopen| and |fread| commands. Since you do not...

10 years ago | 0

How to choose initial component parameters with gmdistribution.fit ?
Once you have clustered your data via the k-means algorithm, you can definitely use the cluster centers as initial conditions fo...

10 years ago | 2

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what is the default amplitude value of the input signal when matlab gives the frequency response with fuction bode ?
Good question! The magnitude Bode plot depicts only the *relative gain* between two signals. Likewise, the phase plot gives you ...

10 years ago | 0

Handwritten digit recognition using Neural networks; How to configure for 2-D input?
Specifying an image as a column vector does not eliminate the adjacency information. As the column of pixels repeats at a regula...

10 years ago | 0

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How to use the trained network to predict future values?
Once you have trained a network, you can use your net as a function. In your case, the outputs of the neural network could be fo...

10 years ago | 0

Show value on the root locus plot without using the Data Cursor
The |rlocus| function can output the complex root locations and the corresponding gains. You can manually plot these values to r...

10 years ago | 0

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PNG and BMP images with imag(image) = 0. Why and how do I get something that makes sense/a nonzero answer?
You are using the |imag| function that returns the imaginary part of the function input. The function input in your case will ha...

10 years ago | 1

Show Step Response Information on Step Response Plot
You're on the right track trying to use |stepinfo|. The |stepinfo| function returns a structure containing all the common step r...

10 years ago | 4

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How to not draw some points of an interval( hmax and hmin )
You can use logical indexing to remove any values greater than and less than the desired bounds. % Defining some arbitrary ...

10 years ago | 0

how to drive out an equation from the trained neural network to use as an objective function for genetic algorithm?
You have a couple of options to acquire the underlying structure for further use, once you have trained your neural network: ...

10 years ago | 1

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Plot two graphs each from different models in one scope
You can use the "mux" function block to combine the two signals of interest. The output of the mux block can be fed directly int...

10 years ago | 1

Help using poly fit to determine equation constants of power function and plotting the linear form
You just need to transform the linear fit coefficients (the outputs from |polyfit|) from a logarithm scale back to the linear sc...

10 years ago | 2

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