add-missing-nan.ps1
    [-InputFile] <String>
    [-OutputFile] <String>
    [[-NaNString] <String>]

This script is adding missing NaN values into XYZ stream.

For some plotting tools it is necessary that the input data forms a uniform "net".

Example:

1   1   2
2   1   4
3   1   8

1   2   1
2   2   1
3   2   2

1   3   3
2   3   1
3   3   4

Here, for each position of the 3x3 matrix a valid z-value is given. If a z-value is missing, some tools skip that line in their output:

1   1   2
2   1   4

1   2   1
3   2   2

1   3   3
2   3   1

That is leading to problems, if you are trying to plot the data with a tool that needs a complete matrix. This script is adding the missing x-y-pairs with NaN as z-value:

1   1   2
2   1   4
3   1   NaN

1   2   1
2   2   NaN
3   2   2

1   3   3
2   3   1
3   3   NaN

The output is sorted by the second row (as in the example).

-InputFile: Path to the input file

-OutputFile: Path to the output file

-NaNString: String that used as z-value for missing x-y-pairs (default: NaN)

This code is licensed under the UNLICENSE. So you can do wat you want. But ... I must admit, that I am bit curious. If you want, you can leave a message and tell me what you are using the script for. Or start a discussion, if you like to share your use case with others.