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I try to set a picture as tooltip.

Everything works fine with ScatterChart (I use example code from http://cran.r-project.org/web/packages/googleVis/vignettes/Using_Roles_via_googleVis.html). But when I try to use ColumnChart (or any other types) it doesn't work, I see only standard tooltip. What's the problem?

This code works:

df <- data.frame(year=1:11,pop=1:11, pop.html.tooltip=letters[1:11])
df$pop.html.tooltip[1]<-'<a href="http://www.geckoanalytics.ru"><img src="http://www.geckoanalytics.ru/images/giraf.jpg" /></a>'
plot(gvisScatterChart(df,options=list(tooltip="{isHtml:'True'}")))

This code doesn't work:

 df <- data.frame(year=1:11,pop=1:11, pop.html.tooltip=letters[1:11])
 df$pop.html.tooltip[1]<-'<a href="http://www.geckoanalytics.ru"><img src="http://www.geckoanalytics.ru/images/giraf.jpg" /></a>'
 plot(gvisColumnChart(df,options=list(tooltip="{isHtml:'True'}")))
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1 回答 1

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gvisColumnChart在googleVis版本：0.4.7有如下界面：

gvisColumnChart(data, xvar = "", yvar = "", options = list(), chartid)

要使工具提示起作用，您需要传递要在yvar参数中绘制的列名向量：

plot(gvisColumnChart(df,
                     xvar='year',
                     yvar=c('pop','pop.html.tooltip'),
                     options=list(tooltip="{isHtml:'True'}")))
于 2014-12-02T12:11:45.600 回答