#2 Very slow loading of dataset with large values

[Limin Fu]

When the dataset under loading contains very large values, the program will be very slow and seems to be block. This problem is caused by the line plot visualization, which has problem in plotting large value.

The simplest way to avoid this problem is to unselect the the "line plot" option from menu or toolbar. However, it should be solved to prevent users being left puzzling when loading some type of datasets.