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Dataset and JoinAcross -- Expected Behaviour?

Posted 10 years ago

I've scraped some data on London's Underground system from various sources on the web, and am trying to combine it into one dataset.

Schematically, this is what I am trying to do:

ds1 = Dataset[{<| "A" -> 1, "B" -> 2 |>, <| "A" -> 3, "B" -> 4 |>, <| "A" -> 5, "B" -> 6 |>}];
ds2 = Dataset[{<| "A" -> 1, "C" -> 20 |>, <| "A" -> 3, "C" -> 40 |>}];
JoinAcross[ds1, ds2, {"A", "A"}]

And this is the Mathematica output from the above, which is as I would expect it to be:

enter image description here

However, when I attempt what is effectively the same thing with my real data, it doesn't work. For example, my two data sets are...

enter image description here

But when I try to combine them, thus...

JoinAcross[csvStations, htmlStations, {"Station", "Station"}]

I get the following result:

enter image description here

Is this a bug, or am I doing something wrong?

POSTED BY: Brad Varey
Posted 10 years ago

Sorry, I have just realised I have been really dumb, and the last result is simply how Mathematica displays a Dataset when the column labels need to wrap.

Apologies to all for wasting your time.

POSTED BY: Brad Varey
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