Shiny R中模型训练的进度条 [英] Progress Bar for Model Training in Shiny R

问题描述

我正在制作一个Shiny App，在其中，单击actionButton时，可以使用插入符号包对模型进行训练.由于此培训需要时间-大约4-5分钟-我想显示一个进度条，该进度条会在模型训练时进行.

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 progress bar which progresses as the model is trained.

谢谢

推荐答案

要在闪亮的应用程序中显示进度栏，您需要在 server 中使用 withProgress 函数，如下所示:

To display progress bar in shiny app, you need to use withProgress function in server as below:

withProgress(message = "Model is Training", value = 1.0, {             
   ## Your code
})

因此，您将代码放入此函数中，并且在代码运行时，它将显示消息模型正在训练".函数中的 value 是应用程序中的进度指示器(1.0是100％).您可以根据计算进行设置.例如，您可以设置 value = min +(max-min)* 0.1 .它不必完全像这样.任何适合您的代码都取决于您.设置 value = 1.0 不会有任何问题，因为在您的案例"Model is Training"中，它会显示进度条及其有意义且相关的消息.

So, you put your code inside this function and it will display the message "Model is training" while your code is running. value in the function is a progress indicator in the app (1.0 is 100%). This you can set depending on computation. For example, you can set value = min + (max - min) * 0.1. It needs not to be exactly like this. Anything that works for you which depend on the code. Setting value = 1.0 wouldn't hurt because it display the progress bar with its meaningful and relevant message in your case "Model is Training".

要获取更多信息，请访问以下链接: https://shiny.rstudio.com/reference/shiny/latest/withProgress.html

To get more info, visit this link: https://shiny.rstudio.com/reference/shiny/latest/withProgress.html

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