考虑以下简单示例
time_idx <- c('2015-11-06 00:35', '2015-11-06 00:36' , '2015-11-06 00:42', '2015-11-06 00:43')
bid <- c(2,2,3,4)
ask <- c(3,3,4,4.5)
q_bid <- c(3,2,4,2)
q_ask <- c(1,3,3,2)
data <- data_frame(time_idx, bid, q_bid, ask, q_ask)
data <- data %>% mutate(time_idx = ymd_hm(time_idx))
# A tibble: 4 × 5
time_idx bid q_bid ask q_ask
<dttm> <dbl> <dbl> <dbl> <dbl>
1 2015-11-06 00:35:00 2 3 3.0 1
2 2015-11-06 00:36:00 2 2 3.0 3
3 2015-11-06 00:42:00 3 4 4.0 3
4 2015-11-06 00:43:00 4 2 4.5 2
在这里,我想绘制时间序列bid
并ask
使用点而不是线,我希望点的 分别与和size
成正比。q_bid
q_ask
这就是我想出的:
ggplot(data, aes(x = time_idx)) +
geom_point(aes(y = bid, color = 'q_bid', size = q_bid, alpha = .4) ) +
geom_point(aes(y = ask, color = 'q_ask', size = q_ask, alpha = .4)) +
scale_x_datetime(breaks = scales::pretty_breaks(n = 10)) +
scale_y_continuous(breaks = scales::pretty_breaks(n = 10)) +
theme(axis.text.x = element_text(angle=90,hjust=1)) +
theme_igray() + xlab('time') + ylab('price')
如您所见,情节是正确的,但传说完全是疯狂的。即:
- 这是0.4的传说吗?
- 系列的名称是
bid
andask
, notq_ask
andq_bid
- 权重是
q_bid
和q_ask
,q_bid
不仅
这里有什么问题?
非常感谢!