Creating a simple 2D contour plot from data files(xlsx or txt).

I want to create a simple contour line with a file with an extension of xlsx or txt. However, it is difficult to use the code because the data file has five lines. How should the x, y, and z values be given and how should the code be made?

[Walter Roberson]

The data has many lines but 5 columns.

As outside observers we have no way of knowing which column has what meaning.

It looks to me as if entries of -99 indicate missing data and so those rows probably need to be removed.

After that you would probably use scatteredinterpolant()

[young been kim]

thank you for your answer :)

Answer 1

[Hiro Yoshino]

Here the function for 'contour':

https://jp.mathworks.com/help/matlab/ref/contour.html?s_tid=doc_ta

Give me detail if possible and then we can work on your problem.