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Creating Field Calculator Expression

whjdev

Hi, I want to project population from an old census report.....the formula is as follows

population*(1+(growth rate/100))^16

I am trying this expression for calculating from attribute table but ITS NOT WORKING

[POP_B_SEX]*(1+ (4.33 / 100 ))Exp (16 )

Note : [POP_B_SEX] is the only column i am using from attribute table.

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Accepted answers

Pieter_Geertvan_den_Beukel

The formula works for me....

Go in ArcMap to the Geoprocessing menu and click Geoprocessing Results. What is the error message that the Field Calculator returns?

To make the formula more simple:

(1+ (4.33 / 100 ))^16 = 1.97037

Your formula can be rewritten as:

[POP_B_SEX]*1.97037

All comments

DanPatterson_Retired

Exponents aren't ^, they are **

whjdev

Yes but you see in the expression i am using "exp()"...wont they work?? and i tried with ** and doesn't work either....i guess there is something wrong with the expression....