我使用gtrendsR软件包有问题。创建示例Shiny APP时，我总是会收到错误消息：
gtrends中的错误：未使用的参数（start_date = start_date（），end_date = end_date（））
开始和结束日期在当前包中不再存在。当前，开始时间和结束时间仅需要指定如下：
两个日期之间的时间跨度（例如：“ 2010-01-01 2010-04-03”）
如何更改功能？
非常感谢您的帮助。
完整的代码如下：
server.R：
# Load libraries ====
if(!require(shiny)){
install.packages('shiny')
}
if(!require(gtrendsR)){
install.packages('gtrendsR')
}
if(!require(reshape2)){
install.packages('reshape2')
}
if(!require(ggplot2)){
install.packages('ggplot2')
}
library(shiny)
library(gtrendsR)
library(reshape2)
library(ggplot2)
data(countries)
# Start shiny application
shinyServer(function(input, output) {
out <- reactive({
if(length(input$terms)>0){
unlist(strsplit(input$terms,","))
}
})
start_date<-reactive({
if(input$period=="2004-present"){as.Date("2004-01-01")}
else if (input$period=="Past90Days"){as.Date(Sys.time())-90}
else if (input$period=="Past12Months"){
m=as.POSIXlt(as.Date(Sys.time()))
m$year=m$year-1
m}
else if (input$period=="2011"){as.Date("2011-01-01")}
else if (input$period=="2012"){as.Date("2012-01-01")}
else if (input$period=="2013"){as.Date("2013-01-01")}
else if (input$period=="2014"){as.Date("2014-01-01")}
else if (input$period=="2015"){as.Date("2015-01-01")}
})
end_date<-reactive({
if(input$period %in% c("2004-present",
"Past90Days","Past12Months"))
{
as.Date(Sys.time())}
else if (input$period=="2011"){as.Date("2011-12-31")}
else if (input$period=="2012"){as.Date("2012-12-31")}
else if (input$period=="2013"){as.Date("2013-12-31")}
else if (input$period=="2014"){as.Date("2014-12-31")}
else if (input$period=="2015"){as.Date(Sys.time())}
})
geo<-reactive({
if(input$geography=="Worldwide"){""}
else{
countries$CODE[countries$COUNTRY==input$geography]
}
})
data<-reactive({
if(length(out()>0))
{
out2<-gtrends(query=out(),start_date=start_date(),end_date=end_date(),geo=geo())
}
})
output$myplot <- renderPlot({
if(length(out()>0)){
z=data()
trend=z$trend
if("end"%in%names(trend)==T)
{
trend=select(trend,-end)}
trend <- melt(trend, id='start')
ggplot(trend, aes(start,value, color=variable)) + geom_line()+ggtitle("Interest over time")+
ylab("Relative Trend")+
theme(plot.title = element_text(size = 18,colour="black"))+
xlab('')+theme(axis.title.y = element_text(colour="#00007A",size=14,angle=90,hjust=.5,vjust=1),
axis.text.y = element_text(colour="darkred",size=14,angle=0,hjust=1,vjust=0),
axis.text.x = element_text(colour="darkred",size=14,angle=0,hjust=1,vjust=0))+
theme(legend.title = element_text(colour="black", size=15,
face="bold"))+
theme(legend.text = element_text(colour="blue", size=14,
face="bold"))
}
})
corr<-reactive({
if(input$corr==T & length(out()>1)){
z=data()
trend=z$trend
trend=trend[,3:ncol(trend)]
cor(trend)
}
})
output$myplot3 <- renderPlot({
if(length(corr()>0)){
data=corr()
qplot(x=Var1, y=Var2, data=melt(cor(data)), fill=value, geom="tile")+
ggtitle('Correlation Matrix')+theme(axis.title.y =element_blank(),axis.title.x =element_blank(),
axis.text.y = element_text(colour="darkred",size=14,angle=0,hjust=1,vjust=0),
axis.text.x = element_text(colour="darkred",size=14,angle=0,hjust=1,vjust=0))+
theme(legend.title=element_blank())+
theme(legend.text = element_text(colour="black", size=14))+scale_fill_gradient2(limits=c(-1, 1),low="skyblue", high="blue")+
theme(plot.title = element_text(size = 20,colour="black"))
}
})
output$myplot2 <- renderPlot({
if(length(out()>0)){
data=data()
z=data$searches
rr=data$regions
for (i in 1:length(z)){
n=z[i]
n=as.data.frame(n)
names(n)=c("searches","hits")
n$searches <- factor(n$searches, levels = n$searches[order(n$hits,decreasing =T)])
colors=c("orange","skyblue","#999966")
col=sample(c(1,2,3),1,replace=T)
x11()
print(ggplot(n, aes(searches,hits))+
geom_bar(stat='identity',fill=colors[col],color='black')+
ggtitle(data$headers[2+2*length(z)+i])+ylab('Hits')+
theme(plot.title = element_text(size = 18,colour="blue"))+
theme(axis.title.x=element_blank(),axis.title.y = element_text(colour="blue",size=14),axis.text.x = element_text(colour="grey20",size=14,angle=60,hjust=.5,vjust=.5,face="plain"))
)
if(geo()=='')
{
x11()
regions = as.data.frame(rr)[c(1,i+1)]
names(regions)=c('region','hits')
regions$region[regions$region=="United States"] = "USA"
world_map = map_data("world")
world_map =merge(world_map, regions, by="region",all.x = TRUE)
world_map = world_map[order(world_map$group, world_map$order),]
g=ggplot(world_map, aes(x=long, y=lat, group=group))+
geom_polygon(aes(fill=hits), color="gray70")
print(g+theme(axis.text.y = element_blank(),
axis.text.x = element_blank(),
axis.title.y = element_blank(),
axis.title.x = element_blank(),
panel.background = element_blank(),
panel.grid.major = element_blank(),
panel.grid.minor = element_blank())+
scale_fill_gradient(low = "skyblue", high = "blue", guide = "colorbar",na.value="white")+ggtitle(data$headers[2+2*length(z)+i])+ylab('Hits')+
theme(legend.key.size = unit(1, "cm"),
legend.title = element_text(size = 12, colour = "blue"),
legend.title.align=0.3,legend.text = element_text(size = 10))+
theme(panel.border = element_rect(colour = "gray70", fill=NA, size=0.5))
)
}
}
}
})
})
和ui.R：
library(shiny)
library(shinydashboard)
dashboardPage(
dashboardHeader(title="By Fish"),
dashboardSidebar(
br(),
h6(" Search Term(s)",style="text-align:center;color:#FFA319;font-size:150%"),
helpText("Give one or more terms that you want R to retrieve data from the Google Trends API.
Use comma to separate terms", style="text-align:center"),
textInput('terms',''),
selectInput("geography",
label = tags$h4(strong(em("Geography")),style="text-align:center;color:#FFA319;font-size:150%"),
choices = c("Worldwide"),
selected = "Worldwide"),
selectInput("period",
label = tags$h4(strong(em("Time Period")),style="text-align:center;color:#FFA319;font-size:150%"),
choices = c("2004-present",
"Past30Days",
"Past90Days",
"Past12Months",
"2011",
"2012",
"2013",
"2014",
"2015"
),
selected = "2004-present"),
checkboxInput("corr",
label = strong("Correlation",style="text-align:center;color:#FFA319;font-size:150%")),
br(),
tags$h1(submitButton("Update!"),style="text-align:center"),
helpText("To get results, click the 'Update!' button",style="text-align:center"),
br(),
br(),
br(),
br(),
br(),
br()
),
#####
## Main Panel
#### help ====
dashboardBody(
fluidRow(
br(),
h5(em(strong("Google Trends Analytics", style="color:darkblue;font-size:210%")),align = "center"),
plotOutput("myplot"),
br(),
plotOutput("myplot3"),
plotOutput("myplot2")
)
))
答案 0 :(得分：0)
您的问题的答案是，您没有以正确的方式使用gtrends()，可能是为较旧版本的软件包编写的代码。
请这样更改您的代码。
out2<- gtrends(keyword = out(),
time = paste0(start_date()," ",end_date()),
geo=geo())
即使在代码未成功运行后，也请注意，因为代码中处理函数结果的方式与实际返回的方式有所不同，因此需要对其进行修复。