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[二oO也
Joined: 22 Feb 2005
Posts: 60
Location: Sweden
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 Posted: Wed Feb 23, 2005 8:52 pm Post subject: Transform problem |
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As I and Dippy46 mentioned at http://www.autohotkey.com/forum/viewtopic.php?t=2499, the Transform, Ouputvar, Round, %Inputvar%, 1 don't seem to work correctly. 
I tried to get rid of some zero-decimals, but Transform didn't change anything on the number.
Ex:
12.300000
should become
12.3
but still was
12.300000
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- Albert Einstein (1879-1955) |
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jonny
Joined: 13 Nov 2004
Posts: 3004
Location: Minnesota
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| Posted: Wed Feb 23, 2005 8:59 pm Post subject: |
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It's working fine. It doesn't claim to remove trailing zeros. Use one of the other methods mentioned in the thread you linked. What this function does is round it to the nearest specified place. For instance take this script:
| Code: | transform,outputvar,round,12.300000,1
msgbox,%outputvar%
return |
It shows, like you said, 12.300000. Now take this script:
| Code: | transform,outputvar,round,12.300001,1
msgbox,%outputvar%
return |
Surprise, surprise! The output of this is, again, 12.300000. You see, it actually is working as documented and I can't find where it says it removes trailing zeros. It's supposed to do it this way because it's not meant to mess with the format of the number, it's meant to mess with the content of the number. |
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[二oO也
Joined: 22 Feb 2005
Posts: 60
Location: Sweden
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| Posted: Wed Feb 23, 2005 10:09 pm Post subject: |
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OK, well everyone makes mistakes. 
So, what do you suggest?
Something like BoBo's suggestion?
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jonny
Joined: 13 Nov 2004
Posts: 3004
Location: Minnesota
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| Posted: Wed Feb 23, 2005 10:32 pm Post subject: |
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Hey, if it works, eh?  |
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Dippy46
Joined: 06 Jul 2004
Posts: 171
Location: Manchester, England.
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| Posted: Fri Feb 25, 2005 1:05 am Post subject: |
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@[二oO也
Sir you were quite correct in your asumptions. This command IS supposed to display your variable to the number of places you dictate.
However this command along with certain others is currently malfunctioning. For those of you who do not understand how this function is supposed to operate,I suggest you performm the same operation in AutoIt3 where the functioning IS working as documented. As I mentioned in a previous post, I'm hoping Chris will pick up on this and clarify the current position.
QED.......
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jonny
Joined: 13 Nov 2004
Posts: 3004
Location: Minnesota
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| Posted: Fri Feb 25, 2005 1:18 am Post subject: |
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While you may be partially correct, this does not qualify as a bug. Here is a quote from the documentation of AU3's Round function:
| Quote: | | and note that decimalplaces will never pad a number with trailing zeros. |
This specifically states that it will never return a number with trailing zeros. In contrast, here is the entirety of AHK's Transform, Round documentation:
| Quote: | | If N is omitted, OutputVar will be set to Value1 rounded to the nearest integer. If N is positive number, Value1 will be rounded to N decimal places. If N is negative, Value1 will be rounded by N digits to the left of the decimal point. For example, -1 rounds to the ones place, -2 rounds to the tens place, -3 rounds to the hundreds place, etc. |
Nowhere does it say that it will deal with trailing zeros. I must assume that Chris has never thought of this, since usually numbers don't have trailing zeros when they are processed by this command. It does sound like a plausible improvement, but it is indeed working as currently documented, so this request would be more in place in the Wishlist section than Bug Report.
I might note that just because something's working in AutoIt3 doesn't mean it will work in AutoHotkey. AutoIt3 has matured more in the area of mathematical operations, and it is more suited for those kind of tasks. The same can also be said for AutoHotkey in the area of hotkeys. The members of AutoIt3's forum would be piqued if you suddenly demanded why there was no support for single-key hotkeys.  |
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Dippy46
Joined: 06 Jul 2004
Posts: 171
Location: Manchester, England.
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| Posted: Fri Feb 25, 2005 3:44 am Post subject: |
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Yeh OK, I'll concede (a little bit). In all fairness it's how I would have expected it to operate rather than how it does operate.
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Chris
Site Admin
Joined: 02 Mar 2004
Posts: 10467
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| Posted: Fri Feb 25, 2005 2:22 pm Post subject: |
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To force rounding to a specific decimal place, you can use SetFormat as in this example:
SetFormat, float, 0.1 ; Always round floating point numbers to one decimal place.
To clarify, I've added the following to "Round" in the documentation: | Quote: | | Note: Round does not remove trailing zeros when rounding decimal places. For example, 12.333 rounded to one decimal place would become 12.300000. This behavior can be altered by using SetFormat prior to the operation (in fact, SetFormat may eliminate the need to use Round in the first place). |
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