please explain following code:[bisp freq,cum,l​ag]=bisp3c​um(R,sampr​ate,maxlag​,'h','b').

the aim is to find 3rd order cumulant in matlab.on executing this error occured is Undefined function 'bisp3cum' for input arguments of type 'double'. .please provide me with the answer.her R is the radon transform of image.samprate i had given is 500 and maxlag=20.

Answer 1

[Hari]

Hi Sanu,

I understand that you are trying to compute the third-order cumulant using a function named bisp3cum in MATLAB, but you are encountering an error indicating that the function is undefined for input arguments of type 'double'.

I assume that "bisp3cum" is a custom or third-party function that is not part of the standard MATLAB toolboxes. You might need to ensure that this function is available in your MATLAB path.

In order to resolve the issue and compute the third-order cumulant, you can follow the below steps:

Check for Function Availability:

Ensure that "bisp3cum" is either a custom function you have or from a third-party source. Verify that the function file bisp3cum.m is in your current directory or MATLAB path.

% Check if the function file exists in the current directory
% Use the command below in the MATLAB Command Window
which bisp3cum

Add Function to MATLAB Path:

If the function file exists but is not in the MATLAB path, add the directory containing bisp3cum.m to the path.

% Add the directory to the MATLAB path
addpath('path_to_directory_containing_bisp3cum');

Verify Input Arguments:

Ensure that the input arguments (R, samprate, maxlag, etc.) are correctly defined and compatible with "bisp3cum". The input R should be the Radon transform of an image.

% Example input definitions
R = radon(image, theta); % Compute Radon transform
samprate = 500;
maxlag = 20;

Execute the Function:

Once the function is accessible and inputs are verified, execute the function to compute the third-order cumulant.

% Call the function with appropriate inputs
[bisp_freq, cum, lag] = bisp3cum(R, samprate, maxlag, 'h', 'b');

Since "bisp3cum" is not a standard MATLAB function, there is no official documentation available. For more information on adding paths, refer to: https://www.mathworks.com/help/matlab/ref/addpath.html

Hope this helps!

[Walter Roberson]

bisp3cum appears to be https://www.mathworks.com/matlabcentral/fileexchange/60-bisp3cum . It would need to be installed, perhaps by using the Add-On Explorer.