label the value of a nunmber variable

["=?gb2312?B?uN/I2dXk?=" <gaorz@xxxxxxxxxxx>]

Hi, All

 

My problem this time is how to label the value of a nunmber variable on the plot?

 

For example:

  let corr=12/190.

 

Now, i want to label the value of corr, and how can i achieve it?  Thanks!

 

Gao Rongzhen