#ocaml on 2019-09-14 — irc logs at freenode.irclog.whitequark.org

2019-06-16 15:10 adrien changed the topic of #ocaml to: Discussions about the OCaml programming language | http://www.ocaml.org | OCaml 4.08 release notes: https://caml.inria.fr/pub/distrib/ocaml-4.08/notes/Changes | Try OCaml in your browser: http://try.ocamlpro.com | Public channel logs at http://irclog.whitequark.org/ocaml

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10:47 <cranix> hello

10:47 <cranix> i'm looking for a way to plot data from list using owl

10:47 <cranix> duckduckgo and google did not gave me answer

10:47 <cranix> i need to convert plain list into dsmat

10:47 <cranix> but can not find suitable function for this

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11:12 <Kitambi> you can write one using List.map, List.iter[i], depending on how you have to build that

11:16 <cranix> Kitambi: i loaded csv from file using Csv module

11:16 <cranix> and i would like to plot this using owl

11:16 <cranix> in jupyter notebook

11:16 <cranix> i'm trying to convert this list first to array

11:17 <cranix> buth without and good result

11:17 <Kitambi> Array.of_list?

11:17 <cranix> i tried that

11:17 <cranix> then Mat.of_array

11:17 <cranix> but it requires additional parameters

11:17 <cranix> and owl insists on using Array2 - two dimensional one

11:17 <cranix> and i'm quite confused

11:17 <cranix> https://ocaml.xyz/chapter/plot.html

11:18 <cranix> this only shows plotting function

11:18 <cranix> not data from list or array

11:18 <cranix> https://ocaml.xyz/apidoc/owl_plot.html#type-definition

11:18 <cranix> here i have plot function which is what i need

11:18 <cranix> but it operates on Owl_dense_matrix.D.mat type

11:18 <cranix> instead of something provided but ocaml itself

11:18 <cranix> and i can not find a way to convert plain List into this type

11:21 <Kitambi> you probably need to iterate over the list to build one (using map, some fold, or some iter)

11:21 <Kitambi> so look at the API docs for List :)

11:22 <Kitambi> I don't know anything about owl, so I can only give you generic advice for this. unless it has a function to build your matrix type from a list, you'll have to do it manually

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11:24 <cranix> Kitambi: i will try

11:24 <cranix> anyway thanks for reply

11:25 <cranix> hmm

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11:26 <cranix> i waved hands and got new error: owl can not find suitable plotting device O.O

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11:53 <cranix> https://github.com/owlbarn/owl/wiki/Tutorial:-How-to-Plot-in-Owl%3F

11:53 <cranix> here i have examples

11:53 <cranix> Plot.(loglog ~h ~spec:[ RGB (0,255,0); LineStyle 2; Marker "+" ] ~x:x y);

11:53 <cranix> what means parens around loglog?

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12:24 <ggole> M.(expr) is short for let open M in expr

12:25 <ggole> Probably done to avoid qualifiying all of those constructors

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13:53 <zolk3ri> /3/2

13:53 <zolk3ri> Err.

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