含缺失值绘图

realleaf · 2019 年5 月 3 日 02:54

缺失值不删除，在绘图的时候直接空着断开，保留对应的横坐标。请问该如何做到呢？试过把missing直接画出来，但是似乎不可行。

LDNN97 · 2019 年5 月 3 日 03:06

Support for `missing` in Plots

opened 11:54AM - 28 Aug 18 UTC

Plots doesn't yet support `missing`, which it should, since it's in Base. The… current approach taken in StatPlots is to copy the inputs, replacing `missing` with `NaN` for `Vector{<:Number}` (while converting to `Float64`), `""` for `String` input and `Symbol()` for `Symbol` input, then propagating that. It should be possible to do so for the `x`, `y` and `z` arguments here https://github.com/JuliaPlots/Plots.jl/blob/602dbdf1d260ef07daa2a2bdae558d82299e3d96/src/series.jl#L75-L88 , as we already copy the input. It's more tricky for everything passed as keyword arguments, but the question is how often they'd contain missing. Personally I think a cleaner approach is to provide first-class missings support in wrapping internal calls in Plots that may return `missing` in `skipmissing` where relevant and just forward the `missing`-containing `Vectors` to the backend and leave it to them to handle them. That makes sense since `missing` is defined in Base, and as such a first-class Julia citizen. But it's more work and we don't know how well the backends handle them. @piever @daschw @SimonDanisch @pfitzseb @jheinen

shilu1984 · 2019 年5 月 3 日 11:00

用PyPlot, 缺少的值设为NaN，可以断开，不知道是不是你想要的。