Comments (2)
harold
commented on June 6, 2024
Hi! Thanks for the issue - very interesting one.
Maybe something did change here, because something similar came up recently on zulip: https://clojurians.zulipchat.com/#narrow/stream/236259-tech.2Eml.2Edataset.2Edev/topic/select.20via.20boolean.20broken.3F
In your case here, you can get the result you expect by not using a clojure vector:
user> (require '[tech.v3.dataset :as ds])
nil
user> (def ds (ds/->dataset [{:a 1 :b 2} {:a 2 :b 3} {:a 3 :b 4}]))
#'user/ds
user> (ds/select ds :all [true true true])
_unnamed [3 2]:
| :a | :b |
|---:|---:|
| 2 | 3 |
| 2 | 3 |
| 2 | 3 |
user> (ds/select ds :all (dtype/make-list :boolean [true true true]))
_unnamed [3 2]:
| :a | :b |
|---:|---:|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |As we discovered in that zulip exchange, the types are determined in a fairly specific way:
So, ...
user> (dtype/elemwise-datatype [true true true])
:object
user> (dtype/elemwise-datatype (dtype/make-list :boolean [true true true]))
:booleanWould be interested to know what @cnuernber thinks about this now that it has come up twice. (:
from tech.ml.dataset.
harold
commented on June 6, 2024
PR: #390
Lots of options here, not sure this is the best, but we can iterate from here... (:
from tech.ml.dataset.
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