在 Shiny App 中训练模型时显示加载标志
问题描述：
我正在制作一个 Shiny 应用程序，在该应用程序中，通过单击 actionButton，使用 caret 包训练模型.由于此训练需要时间 - 大约 4-5 分钟 - 我想在应用程序中显示加载标志或加载 GIF，在模型训练后显示结果.否则，用户将不知道发生了什么或何时训练模型.
I am making a Shiny App in which, at the click of the actionButton, a model is trained using the caret package. As this training takes time - approximately 4-5 minutes - I wanted to display a loading sign or a loading GIF in the App where results are displayed after the model is trained. Otherwise, the User wouldn't know what is happening or when the model is trained.
谢谢
答
可以在 ui.R 中使用加载微调器
There is loading spinner which you can use in your ui.R
# loading the library
library(shinycssloaders)
withSpinner()
# For example, if you have the plot for which you would like to show loading spinner before it's gets drawn while making some data manipulation
withSpinner(plotOutput("my_plot"))
您可以在 https://cran 上找到有关它的更多信息.r-project.org/web/packages/shinycssloaders/README.html