Clojurians Log v2

eleonore: possibly sel ?

I've been thinking about doing something like specter in core.matrix

otfrom: it seems to be only a selection by index. It makes sense for matrices, but for datasets I'd like to be able to select for when a value in column :a is equal to a 10 for example.

mikera: a specter like thing would be cool

does it really need that much power?

hmmm... getting this atm:

(require [clojure.core.matrix.selection :as $])
CompilerException java.lang.ClassNotFoundException: clojure.core.matrix.selection, compiling:(*cider-repl matty*:53:12) 

with core.matrix 0.51

eleonore: I mean sel in clojure.core.matrix.selection as opposed to the select you were looking at

yes, that's the sel I was talking about

eleonore: does this style not work for you? (sel [[-1 0][1 2]] (where pos?)) ;=> [1 2]

(though I can't even get the ns to load at the moment. I suspect PEBCAK)

otfrom: I got an error when trying it with column name. I'm not using matrices but datasets.

eleonore: is it something you can do using sel in incanter?

otfrom: I'm sure of it, yes! I just wanted to know if I could do this using core.matrix instead of having an extra dependency to handle my datasets

eleonore: I think for now we'll have to go w/incanter (1.5.1-SNAPSHOT).

mikera: were you wanting something lens like from specter or was it more just around the power of the selections?

@lora has joined the channel

hi lora

hello otfrom!