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I really need some help with an assignment I'm working on...

In my vector field I would like to summarize all values in a column, how yo do so? If I right-click in the attribute table it is possible to choose summarize, but if I do so and select the column I want to include the values in the column is not summarized I only get a Sum_output. In the sum_output I have a new table with the selected column but no summary!

In my case I have created a buffer zone and want to know the length of it. The length of the buffer zone is divided into the areas where the buffer zone is. So I have around 1000 of pieces of buffer length. How can I summarize these pieces?

Thanks a lot for your help!

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The feature class with buffer zone, is it a polyline or polygon shapefile? Even if you can calculate the length of a polygon, it makes much more sense to do so with a line. –  Martin Jul 11 '13 at 11:52

2 Answers 2

Try the Summary Statistics tool. Set your case field to be the column that represents the different areas.

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There are functions to get statistics for a shapefile (as mentioned by @danb). But first you probably need to calculate the length/area first in a field.

  1. Create a new field (Add field function)
  2. Right click the header of that field --> Calculate geometry. Choose length/area depending on what you need.
  3. The field gets populated with length/area values which you can summarize using the above mentioned function. Chose SUM for Statistics type.

This will give you a table, not a feature class, where the result is displayed (which can be viewed in the Table of contents --> List by source).

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