Please Help me about matlab code

Is there anyone WHO can look at following matlab code. This is estimation of CoVaR which is a measure of systemic risk. The code gives following error: "Not enough input arguments.

Error in quantilereg (line 17) ry=length(y); %number of rows of dependant variable (ry=rx)"

I am new at matlab. Code and the data have been attached. Please help me

Answer 1

[Stephen23]

The problem is how you are calling the function. quantilereg is a function that requires three input arguments:

quantilereg(y,x,theta)

But you are not calling it with any input arguments (possibly by clicking the big green RUN button, which should be IGNORED). Call the function with three input arguments and you will not have this problem. Note that quantilereg does not appear to read any file data, so your file is totally irrelevant to this function.

How to call functions is explained in the introductory tutorials:

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

How to import files is explained in the documentation:

https://www.mathworks.com/help/matlab/standard-file-formats.html

[Stephen23]

sibel çelik's "Answer" moved here:

Thank you very much for your fast response. This is not my code. This is written by Sylvain Benoit for his academic research. I am only running this code. I look at the links which you sent me. However I do not know how I can call the quantilereg function. Could you please help me about this?

[Stephen23]

To call the function you will need something like this:

x = ...
y = ...
theta = ...
quantilereg(y,x,theta)

Where each ellipsis ... represents your definition of that variable, following the specifications given in the function help, e.g.:

x = [1;2;3];
y = [4;5;6];
theta = 0.5;

"However I do not know how I can call the quantilereg function"

The introductory tutorials show how to call functions. I presume that you have now worked through the tutorials to learn basic MATLAB usage, such as how to call functions.