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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"About linestyles: tuple not accepted in rc param file and other inconsistencies","articleBody":"This is related to #8040 and #9797, possibly #7219. \r\n\r\n## Bug report\r\n\r\nApart from strings like `\"-\"`, `\"--\"`,  `\":\"` , the linestyle can also be set as a tuple of an on/off sequence. There are however two different notations, \r\n\r\n* `(on, off, on, off, ...)` and \r\n* `(start, (on, off, on, off, ...))`. \r\n\r\nFor all of the ways to set the linestyle, only one or none of those actually work.  \r\n\r\nMost importantly **there is currently no way to set an on/off linestyle via the rc file.**\r\n\r\n\u003chr\u003e\r\n\r\nThe following lists those combinations and whether they work or not with the respective commands.\r\n\r\n**linestyle /dashes inside plot function**\r\n\r\n| command                                    | working      |\r\n| -------                                    | -------      |\r\n| `plt.plot([1,2], linestyle=\":\")`           | :heavy_check_mark: |\r\n| `plt.plot([1,2], linestyle=(5,1,1,1))`     | :x: |\r\n| `plt.plot([1,2], linestyle=(0,(5,1,1,1)))` | :heavy_check_mark: |\r\n| `plt.plot([1,2], dashes=\":\")`              | :x: |\r\n| `plt.plot([1,2], dashes=(5,1,1,1))`        | :heavy_check_mark: |\r\n| `plt.plot([1,2], dashes=(0, (5,1,1,1)))`   | :x: |\r\n\r\n**using rcParams**\r\n\r\n| command                                          | working      |\r\n| -------                                          | -------      |\r\n| `plt.rcParams[\"grid.linestyle\"] = \":\"`           | :heavy_check_mark: |\r\n| `plt.rcParams[\"grid.linestyle\"] = (5,1,1,1)`     | :heavy_check_mark: |\r\n| `plt.rcParams[\"grid.linestyle\"] = (0,(5,1,1,1))` | :x: |\r\n\r\n**inside cycler using rcParams**\r\n\r\n| command                                                                       | working      |\r\n| -------                                                                       | -------      |\r\n| `plt.rcParams[\"axes.prop_cycle\"] += plt.cycler(\"linestyle\", [\":\"])`            | :heavy_check_mark: |\r\n| `plt.rcParams[\"axes.prop_cycle\"] += plt.cycler(\"linestyle\", [(5,1,1,1)])`     | :x: |\r\n| `plt.rcParams[\"axes.prop_cycle\"] += plt.cycler(\"linestyle\", [(0,(5,1,1,1))])` | :heavy_check_mark: |\r\n\r\n**using rc file**\r\n\r\n| command                                          | working      |\r\n| -------                                          | -------      |\r\n| `grid.linestyle :  :`                            | :heavy_check_mark: |\r\n| `grid.linestyle :  (5,1,1,1)`                    | :x: |\r\n| `grid.linestyle :  (0,(5,1,1,1))`                | :x: |\r\n\r\n**inside cycler using rc file**\r\n\r\n| command                                                   | working      |\r\n| -------                                                   | -------      |\r\n| `axes.prop_cycle : cycler(\"linestyle\", [\":\"] )`           | :heavy_check_mark: |\r\n| `axes.prop_cycle : cycler(\"linestyle\", [(5,1,1,1)] )`     | :x: |\r\n| `axes.prop_cycle : cycler(\"linestyle\", [(0,(5,1,1,1))] )` | :x: |\r\n\r\n\r\n### Correlation\r\n\r\n| command                                                          | string `\":\"`       | tuple `(5,1,1,1)`  | tuple `(0,(5,1,1,1))` |\r\n| -------                                                          | -------            | -------            | -------               |\r\n| `plt.plot(..., linestyle=x)`                                     | :heavy_check_mark: | :x:                | :heavy_check_mark:    |\r\n| `plt.plot(..., dashes=x)`                                        | :x:                | :heavy_check_mark: | :x:                   |\r\n| `plt.rcParams[\"grid.linestyle\"] = x`                             | :heavy_check_mark: | :heavy_check_mark: | :x:                   |\r\n| `plt.rcParams[\"axes.prop_cycle\"] += plt.cycler(\"linestyle\", [x])`| :heavy_check_mark: | :x:                | :heavy_check_mark:    |\r\n| rc file `grid.linestyle :  x`                                    | :heavy_check_mark: | :x:                | :x:                   |\r\n| rc file `axes.prop_cycle : cycler(\"linestyle\", [x] )`            | :heavy_check_mark: | :x:                | :x:                   |\r\n\r\n\r\nI think the first thing to do here is to identify which combinations *should* actually work. \r\n\r\nattn. @afvincent who has last worked on validation of linestyle rc Parameters.","author":{"url":"https://github.com/ImportanceOfBeingErnest","@type":"Person","name":"ImportanceOfBeingErnest"},"datePublished":"2018-07-29T22:06:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/11797/matplotlib/issues/11797"}