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## eval - inconsistent math result

Builder

How is it possible that an eval expression which its components total weight is 100, breach that expected value?

For a given period, I'm getting a result of 101,

while expression components weights are (it totals to 100)

100*(0.08 + 0.03 + 0.12 + 0.16 + 0.06 + 0.18 + 0.06 + 0.06 + 0.25)

and there is not even one component value which exceeds 1.

``````| eval TimeoutScore=100*(
0.08*(bw1sdpSdfPccCsApdex)
+ 0.03*bw1sdpSdfPccMnCsApdex
+ 0.12*bw1sdpSdfPccPsApdex
+ 0.16*(0.5*bw1sdpSdfPpsCsApdex +0.5*bw2sdpSdfPpsCsApdex)
+ 0.06*(0.5*bw1sdpSdfPpsMnCsApdex +0.5*bw2sdpSdfPpsMnCsApdex)
+ 0.18*(0.5*bw1sdpSdfPpsPsApdex + 0.5*bw2sdpSdfPpsPsApdex)
+ 0.06*(0.5*bw1sdpSdfPpsVisaCsApdex + 0.5*bw2sdpSdfPpsVisaCsApdex)
+ 0.06*bw1careSdfMnApdex
+ 0.25*(0.5*bw1sdpSdfSlrApdex + 0.5*bw2sdpSdfSlrApdex))
| stats sum(TimeoutScore) as TimeoutScore sum(bw1sdpSdfPccCsApdex) sum(bw1sdpSdfPccMnCsApdex)     sum(bw1sdpSdfPccPsApdex) sum(bw1sdpSdfPpsCsApdex) sum(bw2sdpSdfPpsCsApdex) sum(bw1sdpSdfPpsMnCsApdex) sum(bw2sdpSdfPpsMnCsApdex) sum(bw1sdpSdfPpsPsApdex) sum(bw2sdpSdfPpsPsApdex) sum(bw1sdpSdfPpsVisaCsApdex) sum(bw2sdpSdfPpsVisaCsApdex) sum(bw1careSdfMnApdex) sum(bw1sdpSdfSlrApdex) sum(bw2sdpSdfSlrApdex)

TimeoutScore    sum(bw1sdpSdfPccCsApdex)    sum(bw1sdpSdfPccMnCsApdex)  sum(bw1sdpSdfPccPsApdex)    sum(bw1sdpSdfPpsCsApdex)    sum(bw2sdpSdfPpsCsApdex)    sum(bw1sdpSdfPpsMnCsApdex)  sum(bw2sdpSdfPpsMnCsApdex)  sum(bw1sdpSdfPpsPsApdex)    sum(bw2sdpSdfPpsPsApdex)    sum(bw1sdpSdfPpsVisaCsApdex)    sum(bw2sdpSdfPpsVisaCsApdex)    sum(bw1careSdfMnApdex)  sum(bw1sdpSdfSlrApdex)  sum(bw2sdpSdfSlrApdex)
101 1   0.854839    0.972727    1   1   1   1   0.975410    1   1   1   0.983871    1   1
``````

EDIT:
Thanks to kristian.kolb suggestion, this issue was solved replacing

``````| eval TimeoutScore=...
``````

by

``````| eval TimeoutScore=exact(...)
``````
Tags (2)
1 Solution
Ultra Champion

Rounding errors? perhaps the `exact()` function for `eval` might help?

http://docs.splunk.com/Documentation/Splunk/latest/SearchReference/CommonEvalFunctions

Builder

Dammit... Forgot that could be the culprit.
If you promote the comment to an answer I will gladly accept it ๐

Ultra Champion

Rounding errors? perhaps the `exact()` function for `eval` might help?

http://docs.splunk.com/Documentation/Splunk/latest/SearchReference/CommonEvalFunctions