Thanks for reporting this.
I agree that getCumFreq should return 0, but the pct and cumPct are more problematic.
One could argue that an IllegalStateException would be more appropriate for these. If
there have been no values added, percentages don't really make sense. Thoughts?
Phil
-----Original Message-----
From: Shing Hing Man [mailto:[EMAIL PROTECTED]
Sent: Wed 8/11/2004 7:41 AM
To: commonMath
Cc:
Subject: [Math] Getter methods in Frequency when there is no data
Hi,
I have tested all the getter methods of
org.apache.commons.math.stat.univariate.Frequency
when
no data has been added. (If anyone is interested, the
JUnit test file
is attached.)
Here is a summary of the result.
Method Result
getCount returns 0 (as expected)
getCumFreq
java.util.NoSuchElementException
getCumPct
java.util.NoSuchElementException
getPct returns NaN
f.getSumFreq return 0 (as expected)
Is it reasonable to expect all the getter methods to
return 0, when
there is no data ?
My version of org.apache.commons.math is dated 10th
August, 2004.
regards,
Shing
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