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I am trying to use ArcMap's Field Calculator to populate values in a column based on a value in another column. So, in pseudo-code:

if [field1] = 'Foo'
  set [field2] = 'Bar'

Something like that. Test for 'foo' in the first attribute, and set the record's second attribute to 'bar.' Seems like it should be pretty easy to do, but I keep receiving a "user interrupt" error every time I try running anything. I think I have a misunderstanding of how to build VBA expressions with the Field Calculator...

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What version of arcmap? I think VBA in the field calculator got deprecated at 10.0. Here's a good intro to the python calculator. – Kirk Kuykendall Mar 1 '11 at 14:50

1 Answer 1

up vote 12 down vote accepted

Try something like this:

dim f2
if [field1] = "foo" then
  f2 = "bar"
end if

Screen shot of this being used in the field calculator.alt text

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Works like a charm. Thanks! – colemanm Sep 15 '10 at 19:49
I totally LOVE this forum! I would have spent 3 days on Esri's forums looking for this answer and found it in 2 minutes here! Thanks! Woot Woot!!! - – sirgeo Mar 1 '11 at 14:32
This works great but I was trying to nest 'if' statements and can't. So if [grid_code] = 1 then f2= 2 end if if[grid_code] = 2 then f2=3.5 end if...etc. but this doesn't work? what am I doing wrong. I tried it before the end if and also tried elif. Also any idea why I get a warning message about field 1 being null and have to click yes to continue? – GeorgeC Oct 26 '11 at 10:22

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