我想创建一个传单地图,您可以在其中选择多个多边形,这将selectizeInput()在一个闪亮的应用程序中更新。这将包括删除选定的多边形(当它在selectizeInput().
我稍微更改/更新了此处答案中的代码(使用 sf 而不是 sp 和更多 dplyr,我可以在其中计算出基本 R 是什么)。
多边形可能可以通过observeEvent绑定来更新input$clicked_locations,但不确定具体如何。
这是代码:
library(shiny)
library(leaflet)
library(sf)
library(dplyr)
#load shapefile
nc <- st_read(system.file("shape/nc.shp", package="sf")) %>%
st_transform(4326)
shinyApp(
ui = fluidPage(
"Update selectize input by clicking on the map",
leafletOutput("map"),
"I would like the selectize input to update to show all the locations clicked,",
"but also when items are removed here, they are removed on the map too, so linked to the map.",
selectizeInput(inputId …Run Code Online (Sandbox Code Playgroud) 我正在尝试将 SpringBoot 版本从 2.1.1 升级到 2.7.x (2.7.5){Java 版本 - 17},当我尝试运行我的应用程序时,收到以下错误消息
引起原因:java.lang.NullPointerException:无法调用“String.contains(java.lang.CharSequence)”,因为“variable”在org.springframework.data.jpa.repository.query.QueryUtils.createCountQueryFor(QueryUtils.java: 607)在org.springframework.data.jpa.repository.query.DefaultQueryEnhancer.createCountQueryFor(DefaultQueryEnhancer.java:49)在org.springframework.data.jpa.repository.query.StringQuery.deriveCountQuery(StringQuery.java:119)在org .springframework.data.jpa.repository.query.AbstractStringBasedJpaQuery.(AbstractStringBasedJpaQuery.java:72) 在 org.springframework.data.jpa.repository.query.NativeJpaQuery.(NativeJpaQuery.java:53) 在 org.springframework.data.jpa .repository.query.JpaQueryFactory.fromMethodWithQueryString(JpaQueryFactory.java:51) 在 org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:169) 在 org.springframework.data.jpa.repository .query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:253) 在 org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:93) 在 org.springframework.data.repository.core .support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:103) ... 省略 60 个常见框架
这是我的依赖项:
implementation 'org.springframework.boot:spring-boot:2.7.5'
implementation('org.springframework.boot:spring-boot-starter-data-jpa')
implementation('org.springframework.boot:spring-boot-starter-actuator')
implementation('org.springframework.boot:spring-boot-starter-web')
implementation('org.springframework.boot:spring-boot-starter-parent:2.7.5')
implementation('org.springframework:spring-jdbc')
implementation('org.springframework:spring-orm')
implementation('org.springframework:spring-core')
implementation('org.springframework:spring-beans')
implementation('org.springframework:spring-webmvc')
implementation('org.springframework:spring-web')
implementation('org.springframework:spring-context')
testImplementation 'org.springframework:spring-test:5.3.25'
compileOnly group: 'javax.servlet', name: 'servlet-api', version: '2.5'
runtime("org.springframework.boot:spring-boot-properties-migrator")
compileOnly group: 'javax.servlet', name: 'javax.servlet-api', version: '4.0.1'
implementation group: 'org.apache.tomcat.embed', name: 'tomcat-embed-core', version: '9.0.56'
implementation group: 'org.hibernate', name: 'hibernate-core', version: '5.6.5.Final'
implementation 'org.springframework.cloud:spring-cloud-context:3.1.0'
implementation …Run Code Online (Sandbox Code Playgroud) nullpointerexception spring-data-jpa jpa-2.1 spring-boot java-17
我正在尝试使用地标获取用户在我的 flutter 应用程序中的位置。我已经导入了运行应用程序所需的所有必要依赖项,但我仍然在地理定位器地标中遇到错误。我不知道该怎么办。
`import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:geolocator/geolocator.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:ft06/requests/google_maps_requests.dart';
class AppState with ChangeNotifier {
static LatLng _initialPosition;
LatLng _lastPosition = _initialPosition;
bool locationServiceActive = true;
final Set<Marker> _markers = {};
final Set<Polyline> _polyLines = {};
GoogleMapController _mapController;
GoogleMapsServices _googleMapsServices =
GoogleMapsServices();
TextEditingController locationController =
TextEditingController();
TextEditingController destinationController =
TextEditingController();
LatLng get initialPosition => _initialPosition;
LatLng get lastPosition => _lastPosition;
GoogleMapsServices get googleMapsServices =>
_googleMapsServices;
GoogleMapController get mapController =>
_mapController;
Set<Marker> get markers => _markers;
Set<Polyline> get …Run Code Online (Sandbox Code Playgroud) 我想要的东西不是字符串。我一看这个,并指出:
这适用于喜欢:
library(datasets)
library(dplyr)
msleep %>%
select(name, sleep_total) %>%
filter(str_detect(tolower(name), pattern = "mouse"))
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但这不适用于以下情况:
msleep %>%
select(name, sleep_total) %>%
filter(str_detect(tolower(name), pattern != "mouse"))
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我得到这个:
Error in filter_impl(.data, quo) :
Evaluation error: object 'pattern' not found.
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有办法吗?
如何更换单个细胞,最好使用%>%?
例如:
library(dplyr)
df <- iris %>%
slice(1:5)
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产生这个:
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4 0.2 setosa
3 4.7 3.2 1.3 0.2 setosa
4 4.6 3.1 1.5 0.2 setosa
5 5.0 3.6 1.4 0.2 setosa
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如果我想改变一个单元格,我会这样做:
df[1,1] <- 6
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这给了我这个:
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 6.0 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4 0.2 setosa
3 4.7 3.2 1.3 0.2 setosa
4 4.6 3.1 1.5 0.2 setosa …Run Code Online (Sandbox Code Playgroud) 我是新手seaborn,我有这个数据集,想要创建一个像这样的图表,但是使用seaborn.
这是我的数据:
max_depth = [ 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 10, 10,
10, 10, 10, 12, 12, 12, 12, 12]
min_samples_split = [2, 5, 15, 20, 25, 2, 5, 15, 20, 25, 2, 5,
15, 20, 25, 2, 5, 15, 20, 25, 2, 5, 15, 20, 25]
test_score = [0.85089537, 0.85089537, 0.85089537, 0.85348114, 0.85354819, 0.87357118, 0.87328475, 0.87147859, 0.87425471, 0.87402261,
0.86355856, 0.86120602, 0.87259394, 0.87582926, 0.87943536, 0.80913078, 0.82786446, …Run Code Online (Sandbox Code Playgroud) 我的标签有问题。我已阅读有关该主题的其他帖子,但无法弄清楚出了什么问题。你能帮忙吗?
数据:
df <- structure(list(type = c("Activity (ACTIV)", "Activity (ACTIV)",
"Activity (ACTIV)", "Function (MEREC)", "Meeting (MEONE)", "Meeting (MEONE)",
"Meeting (MEONE)", "Training (TRAIN)", "Training (TRAIN)", "Training (TRAIN)"
), month = structure(c(1546300800, 1548979200, 1551398400, 1551398400,
1546300800, 1548979200, 1551398400, 1546300800, 1548979200, 1551398400
), class = c("POSIXct", "POSIXt"), tzone = "UTC"), attendance = c(70,
258, 125, 150, 2, 71, 180, 80, 105, 32)), class = c("grouped_df",
"tbl_df", "tbl", "data.frame"), row.names = c(NA, -10L), vars = "type", drop = TRUE, indices = list(
0:2, 3L, …Run Code Online (Sandbox Code Playgroud) 我正在尝试通过我创建的函数运行我的列表,但不断出现错误。我不知道出了什么问题。
F 中的温度:
temp_f = [19, 21, 21, 21, 23]
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功能:
def fahrToCelsius(tempFahrenheit):
return (tempFahrenheit - 32) /1.8
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该功能有效,例如
fahrToCelsius(temp_f[1])
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给出:
-6.111111111111111
但是虽然列表没有运行它。我的尝试:
temp_c = []
for i in temp_f:
temp_c.append (fahrToCelsius(temp_f[i]))
print(temp_c)
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给出这个错误:
IndexError:列表索引超出范围
我尝试了一些不同的东西,但我尝试过的一切都不起作用。你有什么建议吗?谢谢。
这有什么不对?这有效:
iris %>%
filter(Species == "setosa") %>%
summarise(msl = mean(Sepal.Length), msw = mean(Petal.Width))
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并生产:
msl msw
1 5.006 0.246
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但是这个功能不起作用:
means <- function(data, value){
data <- enquo(data)
value <- enquo(value)
data %>%
filter(Species == !!value) %>%
summarise(msl = mean(Sepal.Length), msw = mean(Petal.Width))
}
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并means(iris, "setosa")产生此错误:
UseMethod("filter_")中的错误:"filter_"的适用方法没有应用于类"c"(quosure','formula')的对象"来自:filter _(.data,.dots = compat_as_lazy_dots(...) ))