I get Not a Number using either your keystrokes or mine. This is weird.
> On Jan 8, 2020, at 6:23 PM, Dinse, Gregg (NIH/NIEHS) [C]
> <[email protected]> wrote:
>
> My problem machine is at the office. I'm at home now and the Calculator app
> works fine on that mac.
>
> I guess there are multiple ways to calculate exp(-1). What I have been doing
> is the following. I open the Calculator app and set View/Scientific. I
> click on 1, then the +/- key, and then the eˣ key. At home, the results
> field shows 1, and then -1, and then 0.367879... as I click those 3 keys. At
> the office, I got 1 and then -1 and then "Not a number". As you noted,
> another way to calculate exp(-1) is to click the minus sign, then 1, then the
> equals sign, and then the eˣ key. This gives the correct response at home,
> but I did not try that at the office. In any event, both should function
> properly and at least one does not give the correct answer on my iMac at the
> office.
>
> Over the next day or two, I will boot my iMac at the office from an external
> disk with a version of the OS for which the Calculator app works fine when
> booting at home. Hopefully this will help me figure out if it's a hardware
> or software problem.
>
> Gregg
>
> From: Macs R We <[email protected] <mailto:[email protected]>>
> Date: Wednesday, January 8, 2020 at 7:48 PM
> To: C D Tavares <[email protected] <mailto:[email protected]>>
> Cc: Gregg Dinse <[email protected] <mailto:[email protected]>>,
> "[email protected] <mailto:[email protected]>"
> <[email protected] <mailto:[email protected]>>
> Subject: Re: problem with Calculator app
>
> The ironic part is that I just tried the sequence myself:
>
> - 1 = eˣ
>
> and got "Not a Number." 😳
>
> (High Sierra, MBP 2015)
>
>
>> On Jan 8, 2020, at 1:53 PM, Macs R We <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> On the other hand, if it's clearly your hardware, you may have a much easier
>> time of wangling a free repair or replacement from Apple.
>>
>>> On Jan 8, 2020, at 1:45 PM, Dinse, Gregg (NIH/NIEHS) [C]
>>> <[email protected] <mailto:[email protected]>> wrote:
>>>
>>> Thanks for the suggestion. I should be able to do this, but probably not
>>> today. I never even thought about the hardware being the problem. That is
>>> upsetting.
>>>
>>> Gregg
>>>
>>> From: Macs R We <[email protected] <mailto:[email protected]>>
>>> Date: Wednesday, January 08, 2020 at 3:40 PM
>>> To: "Dinse, Gregg (NIH/NIEHS) [C]" <[email protected]
>>> <mailto:[email protected]>>
>>> Cc: "[email protected] <mailto:[email protected]>"
>>> <[email protected] <mailto:[email protected]>>
>>> Subject: Re: problem with Calculator app
>>>
>>> What's scary about this is that the response "not a number" is often a
>>> response directly from the hardware.
>>>
>>> If, like me, you are lucky enough to have on hand an external drive with
>>> relatively virgin copies of various Apple operating systems, you could boot
>>> one of them and see if you get the same result. It's possible that you will
>>> get this result no matter which operating system you boot on that hardware,
>>> whereas if you take the same drive and boot someone else's Mac with it, you
>>> may get proper results. That would pretty definitively show that the
>>> problem is your chip.
>>>
>>>> On Jan 8, 2020, at 12:49 PM, Dinse, Gregg (NIH/NIEHS) [C]
>>>> <[email protected] <mailto:[email protected]>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> I am running the latest version of Mojave (10.14.6) on a fairly new iMac.
>>>> Using the Scientific view in the Calculator app, I tried to evaluate
>>>> exp(-1) and it said "Not a number". I tried several other negative values
>>>> and none worked, even though they certainly should. When I tried taking
>>>> 10 to the -1 power, I got the correct result (0.1), but for some reason it
>>>> has a problem raising "e" (the base for natural logarithms) to a negative
>>>> power.
>>>>
>>>> I tried quitting the app, but that did not help. I tried rebooting my
>>>> mac, but that did not help. I contacted our support group and they said
>>>> the only thing they could do is to reinstall the operating system, which
>>>> seems like a drastic step. And exp(-1) worked just fine on the support
>>>> person's mac.
>>>>
>>>> Is there anything else that someone can suggest, short of reinstalling the
>>>> OS? The support person said that we could not simply replace the
>>>> Calculator app because it was part of the OS. Any thoughts?
>>>>
>>>> Thanks,
>>>>
>>>> Gregg
>
> --
> Macs R We -- Personal Macintosh Service and Support
> in the Wickenburg and far Northwest Valley Areas.
> http://macsrwe.com <http://macsrwe.com/>
--
Macs R We -- Personal Macintosh Service and Support
in the Wickenburg and far Northwest Valley Areas.
http://macsrwe.com
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