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Groups > microsoft.public.excel.programming > #109986

Excel and VBA calculate the same formula differently

Newsgroups microsoft.public.excel.programming
Date 2017-04-10 11:04 -0700
Message-ID <672d43ea-8a3c-425c-9ff3-62a0e58aeb87@googlegroups.com> (permalink)
Subject Excel and VBA calculate the same formula differently
From Ottmar Brandau <apex@blowmolding.org>

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I have a strange phenomenon. In Excel the following expression: LN(8/PI()^2*280/125) equates to 0.596458. In VBA the code: Log(8/(4*Atn(1))^2*280/125 comes out to 0.554588, a difference of over 7%. I makes no difference to replace (4*Atn(1)) with 3.14, the difference is basically the same and it screws up my calculation. BTW, Log in VBA is the same as LN in Excel. Does somebody have an idea why this is and how to correct it? Thanks. Ottmar

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Thread

Excel and VBA calculate the same formula differently Ottmar Brandau <apex@blowmolding.org> - 2017-04-10 11:04 -0700
  Re: Excel and VBA calculate the same formula differently GS <gs@v.invalid> - 2017-04-10 14:17 -0400
  Re: Excel and VBA calculate the same formula differently "Auric__" <not.my.real@email.address> - 2017-04-10 19:58 +0000
  Re: Excel and VBA calculate the same formula differently Ottmar Brandau <apex@blowmolding.org> - 2017-04-10 13:38 -0700
    Re: Excel and VBA calculate the same formula differently "Auric__" <not.my.real@email.address> - 2017-04-11 06:09 +0000
  Re: Excel and VBA calculate the same formula differently cacuoc334465c <cacu123oc365a@gmail.com> - 2017-04-12 02:35 +0100
  Re: Excel and VBA calculate the same formula differently cacuoc334465c <cacu123oc365a@gmail.com> - 2017-04-12 06:39 +0100
  Re: Excel and VBA calculate the same formula differently cacuoc334465c <cacu123oc365a@gmail.com> - 2017-04-12 14:10 +0100
  Re: Excel and VBA calculate the same formula differently hoclaixenang <hoclaixenang@gmail.com> - 2017-04-12 16:46 +0100
  Re: Excel and VBA calculate the same formula differently cacuoc334465c <cacu123oc365a@gmail.com> - 2017-04-12 16:10 +0100

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