Since I'm new to python I have an issue with writing the correct code to achieve the following. The picture is an example of an attribute table of which i want to make frequency distribution graphs according to certain ranges of an indicator variable. For instance a graph should be created in which the range of ORG_STOF (indicator variable) should be: < 2, 2 - 3.5, etc. for which the Count_ORG_STOF needs to be indicated.

According to another question post i found (Using Range in Python expression of ArcGIS Field Calculator?) I thought that a solution would be something in the line of: Additional fields should be created for each range (in most cases consisting of 3 or 5)

    def "Range_one"(value):
    if value > 2 and value < 3.5:
     return "Value of Count_ORG"
     return "0"

Then in the calculation area:


However, it is a bit different in my case, since in the solution script I had in mind I need to refer to two fields.

After trial


1 Answer 1


Use the expression below

def "Range_one"(value1,value2):
    if value > 2 and value < 3.5:
        return value2
        return 0

With this call

Range_one (!ORG_STOF!,!Count_ORG_STOF!)
  • Hi, thanks for your adequate response. However, I have tried to copy the script that you wrote but I did not succeed.. (See image).
    – Soil33
    Aug 12, 2016 at 16:03
  • I have tried separating it with the top part in the pre-logic script code as well
    – Soil33
    Aug 12, 2016 at 16:23
  • you should tick a codeblock, insert first part def "Range_one"(value1,value2): if value > 2 and value < 3.5: return value2 else: return 0 in a first window and insert Range_one (!ORG_STOF!,!Count_ORG_STOF!) in second window
    – GRM
    Aug 12, 2016 at 17:14
  • Got it! I had to change the "Range_one", to calc, and then it worked. Thank you kind for your help everyone and have a good day
    – Soil33
    Aug 15, 2016 at 8:06

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