Range-bar charts are different from time-based charts ... Different trading instruments move in a variety of ways. For example, a higher-priced stock such as Google (GOOG) might have a daily ...

The previous example illustrates how you can create R charts using raw data (process measurements ... The variable TIMEX contains the subgroup means, the variable TIMER contains the subgroup ranges, ...

The previous example illustrates how you can create median and range charts using raw data (process measurements). However, in many applications, the data are provided as subgroup summary statistics.

For example, in a survey about the number ... make sense to group this data before making a frequency chart. Image caption, The answers range from 0 to 34. A sensible grouping would be to put ...