I need bitwise functions for a spreadsheet (shift, OR, XOR, etc). Is there a way to do this in Excel for example?

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1/27/2010 3:34:01 PM

Excel has an OR function and VBA has both OR and XOR but the latter is not included as a worksheet function but for XOR you can use. =NOT(A1)+NOT(B1)=1 another XOR =(A1<>0)+(B1<>0)=1 I have no idea what 'shift' or etc mean in this context -- Mike When competing hypotheses are otherwise equal, adopt the hypothesis that introduces the fewest assumptions while still sufficiently answering the question. "vbano" wrote: > I need bitwise functions for a spreadsheet (shift, OR, XOR, etc). Is there a > way to do this in Excel for example?

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1/27/2010 5:16:01 PM

"Mike H" wrote: > Excel has an OR function and [...] for XOR you can use. > =NOT(A1)+NOT(B1)=1 Excel functions are boolean operations, not bitwise operations. Compare the difference between: =--AND(12,10) =bitAND(12,10) Function bitAND(a as long, b as long) as long bitAND = a AND b End Function Presumably, the OP wants the bitAND result. For Mike's edification, the difference is: a bitwise function operates on the individual truth value (0 or 1) of individual bits, whereas a boolean function operates on the truth value (zero or non-zero) of the entire value. binAND(12,10) is 8 because 12 is the binary 1100, 10 is the binary 1010, and 8 is the binary 1000. > I have no idea what 'shift' or etc mean in this context Ostensibly, shift left and right can be accomplish by multiplying and dividing by 2, assuming the OP does not want circular shifts. However, that will not shift bits into and out the sign bit. I believe that handling that will also cover the boundary condition the can result in an overflow error when "shifting left". ----- original message ----- "Mike H" wrote: > Excel has an OR function and VBA has both OR and XOR but the latter is not > included as a worksheet function but for XOR you can use. > > =NOT(A1)+NOT(B1)=1 > > another XOR > > =(A1<>0)+(B1<>0)=1 > > I have no idea what 'shift' or etc mean in this context > -- > Mike > > When competing hypotheses are otherwise equal, adopt the hypothesis that > introduces the fewest assumptions while still sufficiently answering the > question. > > > "vbano" wrote: > > > I need bitwise functions for a spreadsheet (shift, OR, XOR, etc). Is there a > > way to do this in Excel for example?

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1/27/2010 5:40:09 PM

I wrote: > Ostensibly, shift left and right can be accomplish by multiplying and > dividing by 2, assuming the OP does not want circular shifts. > > However, that will not shift bits into and out the sign bit. I believe > that > handling that will also cover the boundary condition the can result in an > overflow error when "shifting left". I presume that the OP is only interested in bitwise operations for (up to) 32-bit integers -- type Long in VBA. But of course, Excel will store the result effectively as type Double. Ostensibly, that is not a problem since type Double has a 52-bit mantissa and a separate sign bit. But ironically, if the left shift is done in Excel (multiply by 2), there is no overflow problem. > binAND(12,10) is 8 because 12 is the binary 1100, 10 is the binary 1010, > and 8 is the binary 1000. Of course, the type Double representation looks very different. But that does not matter because no precision is lost when converting from 32-bit integer (Long) to Double, then to 32-bit integer again. ----- original message ----- "Joe User" <joeu2004> wrote in message news:0DC5FFF5-0CE0-4CE9-BA52-CCDB84226067@microsoft.com... > "Mike H" wrote: >> Excel has an OR function and [...] for XOR you can use. >> =NOT(A1)+NOT(B1)=1 > > Excel functions are boolean operations, not bitwise operations. Compare > the > difference between: > > =--AND(12,10) > > =bitAND(12,10) > > Function bitAND(a as long, b as long) as long > bitAND = a AND b > End Function > > Presumably, the OP wants the bitAND result. > > For Mike's edification, the difference is: a bitwise function operates on > the individual truth value (0 or 1) of individual bits, whereas a boolean > function operates on the truth value (zero or non-zero) of the entire > value. > > binAND(12,10) is 8 because 12 is the binary 1100, 10 is the binary 1010, > and > 8 is the binary 1000. > > >> I have no idea what 'shift' or etc mean in this context > > Ostensibly, shift left and right can be accomplish by multiplying and > dividing by 2, assuming the OP does not want circular shifts. > > However, that will not shift bits into and out the sign bit. I believe > that > handling that will also cover the boundary condition the can result in an > overflow error when "shifting left". > > > ----- original message ----- > > "Mike H" wrote: >> Excel has an OR function and VBA has both OR and XOR but the latter is >> not >> included as a worksheet function but for XOR you can use. >> >> =NOT(A1)+NOT(B1)=1 >> >> another XOR >> >> =(A1<>0)+(B1<>0)=1 >> >> I have no idea what 'shift' or etc mean in this context >> -- >> Mike >> >> When competing hypotheses are otherwise equal, adopt the hypothesis that >> introduces the fewest assumptions while still sufficiently answering the >> question. >> >> >> "vbano" wrote: >> >> > I need bitwise functions for a spreadsheet (shift, OR, XOR, etc). Is >> > there a >> > way to do this in Excel for example?

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1/27/2010 6:00:19 PM

Basically, I am using the Rank function on a column of cells with value that are numbers. However, in order to make the numbers look the wa that I wanted, I used =TEXT(number,"#,##0"). I'm guessing that RANK does not work on numbers that have had thei format changed by the TEXT() function. Can anyone suggest a way aroun this? THANKS! My first post -- Message posted from http://www.ExcelForum.com Hi, Keep them as numbers and use custom format #,##0 jeff >-----Original Message----- >Basically, I am using the Rank function on a column of cells with values >tha...

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Hello I am trying to create a spreadsheet to keep track of scores. Each score has a corresponding number of points. For example if the score is between 170 and 174.5 the number of points is 1, if it is between 175 and 179.5 it is 2 and so on up to 200 where it is worth 8 points. I can't seem to figure out how to tell excel that if the score falls between two numbers display this value. I have tried it multiple ways such as =IF(D8>=170<=174.5,1, IF(D8>=175<=179.5,2, IF(D8>=180<=184.5,3, IF(D8>=185<=189.5,4, IF(D8>=190<=194.5,4, IF(D8>=195<=197.5,6, IF(D8...

I have a page that displays an Excel table using ASP. Everything seem to work just fine, but any attempt to sum (or run other math functions results in a 0 column total. Ideas? Thanks, Dav -- Message posted from http://www.ExcelForum.com On Thu, 22 Jan 2004 13:58:40 -0600, midgardb <<midgardb.10g8jq@excelforum-nospam.com>> wrote: >I have a page that displays an Excel table using ASP. Everything seems >to work just fine, but any attempt to sum (or run other math functions) >results in a 0 column total. Ideas? > >Thanks, >Dave > > Probably those numbers ...

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How can I make Excel evaluate the error function for both negative and positive numbers? ...

Hello, I created a simple function on VBA as follows: Function Test() As Integer Dim I As Single For I = 17 To 24 Test = (Test + 1) * Range("Examples_1_a_4!B" & I) Next I End Function On my Excel sheet I have on a cell the following: =Test() It works but when I change a value in the range I need to go to the result cell and click enter to the value be updated. Why? Thanks, Miguel Hi Miguel You have to make you funciton volatile, to do so, add this as first line in you sub: Application.Volatile Regards, Per "shapper" &...

Hi there can I use a excel function such as SUM on a 3d array? e.g. Dim array1(10,10,10) Dim av1 as integer av1 = Application.WorksheetFunction.average(array1(1,1,1):array1(10,1,1) debug.print av1 many thanks If you can't find a function that suits your needs, you can always write your own 3-D sum function as Follows: Option Explicit Option Base 1 Public Sub SumMyArray() Dim intMyArray(2, 3, 4) As Integer Dim lngTheFinalSum As Long intMyArray(1, 1, 1) = 1 intMyArray(1, 1, 2) = 1 intMyArray(1, 1, 3) = 1 intMyArray(1, 1, 4) = 1 intMyArray(1, 2, 1) = 1 intM...

Hi. I have 2 CListCtrls. ctrl-a, OnSelChange() changes a global var to equal the newly selected items index. ctrl-b allows users to change the list text using inplace editing, then OnEndLabelEdit() grabs the value of the global var and uses it. The global var is also used elsewhere. Problem is, when im inplace editing in ctrl-b, and i click an item in ctrl-a, OnSelChange() for ctrl-a is called BEFORE OnEndLabelEdit() for ctrl-b so when the OnEnd for ctrl-b is called, the global var is incorrect because it was changed too early! I thought that the OnSelEditEnd message would come a...

I have two companies but different functional currencies and common reporting currency. Can I use reporting tree in FRX. (V 6.7) for these two companies. ...

In my excel worksheet I have a column (say Column A)with a series of dates (11/30/0l3, 1/10/04, etc). I would like to be able, say in Column B, to see what day of the week the certain date is. I have looked thru the instructions for the Weekday function, and it is beyond me. Can someone give me a simple formula which I can place into the first cell of Column B and copy all the way down, so that in Column B it will be a weekday corresponding to the date in Column A? To reply by mail, remove 'nick'. Shirley B. Webmaster: http://jumi-shirley-butler.com http://www.geocities.com/mhc_repo...