[英]R ggplotly reverts legend name changes in ggplot2
根據下面的數據和代碼, ggplotly
將legend labels
更改回列值。
我確實找到了解決方案,但這需要添加一個新列。 有沒有辦法在不修改數據的情況下做到這一點?
盡管使用 scale_fill_manual(),ggplotly() 仍忽略圖例標簽編輯
數據( pop_gen_df
):
structure(list(age_group = c("< 5 years", "5 - 14", "15 - 24",
"25 - 34", "35 - 44", "45 - 54", "55 - 64", "65 - 74",
"75 - 84", "85 +", "< 5 years", "5 - 14", "15 - 24", "25 - 34",
"35 - 44", "45 - 54", "55 - 64", "65 - 74", "75 - 84",
"85 +"), Type = c("males", "males", "males", "males", "males",
"males", "males", "males", "males", "males", "females", "females",
"females", "females", "females", "females", "females", "females",
"females", "females"), Value = c(-6, -13, -13, -15, -17, -15,
-11, -6, -3, -1, 6, 12, 12, 14, 16, 15, 12, 7, 4, 2)), row.names = c(NA,
-20L), class = c("tbl_df", "tbl", "data.frame"))
代碼:
# Plot
gg_pop_hisp = ggplot(pop_hisp_df, aes( x = forcats::as_factor(age_group), y = Value, fill = Type)) +
geom_bar(data = subset(pop_hisp_df, Type == "females"), stat = "identity") +
geom_bar(data = subset(pop_hisp_df, Type == "males"), stat = "identity") +
scale_y_continuous(labels = function(z) paste0(abs(z), "%")) + # CHANGE
scale_fill_manual(name = "", values = c("females"="#FC921F", "males"="#149ECE"), labels = c("Females", "Males")) +
ggtitle("HISPANIC POPULATION BY GENDER AND AGE GROUP") +
labs(x = "PERCENTAGE POPULATION", y = "AGE GROUPS", fill = "Gender") +
theme_minimal() +
theme(legend.position="bottom") +
coord_flip()
# Interactive and place legend at the bottom
ggplotly(gg_pop_hisp) %>%
layout(
legend = list(
orientation = 'h', x = 0.3, y = -0.1,
title = list(text = '')
)
)
我不確定這是否屬於“不修改數據”,而是修改了用於定義美學的數據。
在定義fill
美學並在那里定義標簽時,傳遞Type
作為一個因素。 您不再需要在scale_fill_manual
和 plotly 中顯式添加標簽,但您需要更新顏色映射以使用大寫版本的標簽。
gg_pop_hisp = ggplot(
pop_hisp_df,
aes(
x = forcats::as_factor(age_group),
y = Value,
# explicitly define fill using a factor to define the labels
fill = factor(
Type, levels = c("females", "males"), labels = c("Females", "Males")
)
)
) +
geom_bar(data = subset(pop_hisp_df, Type == "females"), stat = "identity") +
geom_bar(data = subset(pop_hisp_df, Type == "males"), stat = "identity") +
scale_y_continuous(labels = function(z) paste0(abs(z), "%")) +
# Update the color mappings to use the new labels
# No need for the labels arguement because it's taken from the factor labels
scale_fill_manual(name = "", values = c("Females"="#FC921F", "Males"="#149ECE")) +
ggtitle("HISPANIC POPULATION BY GENDER AND AGE GROUP") +
labs(x = "PERCENTAGE POPULATION", y = "AGE GROUPS", fill = "Gender") +
theme_minimal() +
theme(legend.position="bottom") +
coord_flip()
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