Charts drawing problem using semilogy

Why, when I use semilogy, in some cases the graph is not displayed continuously? Is there a solution to this problem? Please pay attention to the image below.

[William Rose]

@Mohammad Abedzadeh, please provide the code you used to generate the image. Then people may be able to assist you. Thank you.

[Walter Roberson]

negative numbers are not drawn for log plots; complex numbers are also not drawn.

Exception: if all of the data in the log dimension is negative, then MATLAB goes ahead and draws it anyhow as-if it had been positive. This is not a design choice I agree with, but it happens.

[Mohammad Abedzadeh]

@Walter Roberson What is your solution? What command should I use for my chart?

[Walter Roberson]

Save your data and attach it as a .mat so that we can experiment.

[Mohammad Abedzadeh]

@Walter Roberson I can not. Because my code execution time is very long.

[Walter Roberson]

If you have an existing .fig with the data then you could zip that and attach the zip; we can extract the data from the .fig

Another case where MATLAB does not draw lines, is if the data becames NaN or infinite.

[Mohammad Abedzadeh]

@Walter Roberson Thank you very much.