Why nftool will not understand "x=-100:100"?

I'm learning about the nftool, and I have no problem working with CVS files.

But when I try to import a text file with content:

x=-100:100;

..as coma-separed value, but it will not understand it as 201 samples of 1 variable, as you can see in the screenshot:

.

Any idea what's wrong here? (on Matlab R2011b)

[Jan]

As far as I can see, the problem has no relation to nftool, but you are stuck in the import wizard already. Is this true? And I do not see any comma-separated data here. You x.txt does not seem to be a csv-file.

Why do you expect, that the import wizard can understand this kind of input?