当前有一个包含以下内容的表：
promo ad med_revenue
No Medium 31.92
No Small 33.12
Yes Medium 38.25
Yes Small 32.50
gm_ab %>%
group_by(promo,ad) %>%
summarize(median_revenue = median(revenue)) %>%
ggplot(mapping = aes(x = reorder(promo,-median_revenue),y = median_revenue,fill = ad)) +
geom_bar(stat = "identity",position = "dodge") +
coord_flip()
问题：如何分隔条形图，所以我可以有四个不同的X-变量，按中位价格顺序显示它们？例如：不促销小型广告，是促销中型广告
您可以通过使用@ExceptionHandler({MethodArgumentNotValidException.class})
public void handleMethodArgumentNotValidException(
MethodArgumentNotValidException manve,HttpServletResponse response) throws IOException {
exceptionLog.error(manve.getMessage());
Map<String,String> errors =
manve
.getBindingResult()
.getFieldErrors()
.stream()
.collect(Collectors.toMap(FieldError::getField,FieldError::getDefaultMessage));
String errorMessage = "...."
if (!errors.isEmpty()) {
ObjectMapper mapper = new ObjectMapper();
errorMessage = mapper.writeValueAsString(errors);
}
response.sendError(400,errorMessage);
}
创建promo和ad之间的交互的新变量来做到这一点：
str_c