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I have the following table:
Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#2
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Here is an example of monthly updating:
In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#3
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Thanks Gary,
The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#4
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Put this formula...
=DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#5
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Rick,
Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#6
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Just one more question Rick,
When I reach Dec-08, will Jan-08, at the top of the list, change to Jan-09 or do I have to continue with the list down as far as I wish? -- capt "capt" wrote: Rick, Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#7
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No, it will not. When the date is January 1, 2009 is when the Jan-08 will
change. Were you after some other functionality? Here is a formula that will show you how the display will look for various dates. Put this in some cell (other than C1) and copy down... =DATE(YEAR($C$1)-(MONTH($C$1)<ROWS($1:1)),ROWS($1:1),1) Just type various dates into C1 and watch how the display changes for them. If you need a different type of display, just let us know. Rick "capt" wrote in message ... Just one more question Rick, When I reach Dec-08, will Jan-08, at the top of the list, change to Jan-09 or do I have to continue with the list down as far as I wish? -- capt "capt" wrote: Rick, Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#8
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No thats fine Rick, your first code will do nicely.
Thank very much. -- capt "Rick Rothstein (MVP - VB)" wrote: No, it will not. When the date is January 1, 2009 is when the Jan-08 will change. Were you after some other functionality? Here is a formula that will show you how the display will look for various dates. Put this in some cell (other than C1) and copy down... =DATE(YEAR($C$1)-(MONTH($C$1)<ROWS($1:1)),ROWS($1:1),1) Just type various dates into C1 and watch how the display changes for them. If you need a different type of display, just let us know. Rick "capt" wrote in message ... Just one more question Rick, When I reach Dec-08, will Jan-08, at the top of the list, change to Jan-09 or do I have to continue with the list down as far as I wish? -- capt "capt" wrote: Rick, Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#9
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Sorry Rick,
Iv encounted another problem. When added the formula it has slowed down the calculation of the workbook. Is that because the formula has slowed it down or is it something else? -- capt "capt" wrote: No thats fine Rick, your first code will do nicely. Thank very much. -- capt "Rick Rothstein (MVP - VB)" wrote: No, it will not. When the date is January 1, 2009 is when the Jan-08 will change. Were you after some other functionality? Here is a formula that will show you how the display will look for various dates. Put this in some cell (other than C1) and copy down... =DATE(YEAR($C$1)-(MONTH($C$1)<ROWS($1:1)),ROWS($1:1),1) Just type various dates into C1 and watch how the display changes for them. If you need a different type of display, just let us know. Rick "capt" wrote in message ... Just one more question Rick, When I reach Dec-08, will Jan-08, at the top of the list, change to Jan-09 or do I have to continue with the list down as far as I wish? -- capt "capt" wrote: Rick, Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#10
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Well, if you have done nothing else but add the formulas, then I'd have to
suspect them as being the culprit. More than likely, it is the YEAR, MONTH and NOW functions that are causing the problem. These are "volatile" functions and, as such, are recalculated **every** time any calculation in the worksheet is performed. I did a Google search on the words excel, volatile and functions and came up with three-quarters of a million hits for it (in case you want to research the volatile function issue on your own). In the formula I posted, there are 3 volatile function calls; but, with NOW being embedded within the other two, that may be multiplying the effect. Now, I am not an "Excel person" as such (my expertise, if you want to call it that, is in the compiled Visual Basic world), so I don't know this for sure, but with only 12 uses of my function, I find it hard to believe their volatile nature could impact the performance of your spreadsheet in any dramatic way. However, since you are seeing that effect, I guess I must be wrong in that conclusion. There is a way to minimize the problem though... reduce the number of direct volatile function calls. With my formulas, you could do something like this. In an out of the way location (hide the column afterwards if you don't want anyone seeing it), say Column Z, put =TODAY() in Z1, =YEAR(Z1) in Z2 and =MONTH(Z1) in Z3. Then change my formula to this... =DATE($Z$2-($Z$3<ROWS($1:1)),ROWS($1:1),1) and copy that down. This will reduce the number of volatile function calls within those 12 rows significantly and may help in your overall performance problem (or, at least, it will minimize the impact of my formulas on the problem). If you have any other references to NOW or NOW embedded in the YEAR or MONTH function in your spreadsheet, you can point them to these Z-column cells as well (remember to use absolute references if you are copying them down). Oh, by the way, in researching the volatile functions, I once came across this advice... if you had volatile function calls and removed them, it might be necessary to rebuild the dependency tree in order to make Excel "forget" about the volatile functions. You can do this by pressing Ctrl+Shift+Alt+F9 after you have finished editing out the volatile functions. Rick "capt" wrote in message ... Sorry Rick, Iv encounted another problem. When added the formula it has slowed down the calculation of the workbook. Is that because the formula has slowed it down or is it something else? -- capt "capt" wrote: No thats fine Rick, your first code will do nicely. Thank very much. -- capt "Rick Rothstein (MVP - VB)" wrote: No, it will not. When the date is January 1, 2009 is when the Jan-08 will change. Were you after some other functionality? Here is a formula that will show you how the display will look for various dates. Put this in some cell (other than C1) and copy down... =DATE(YEAR($C$1)-(MONTH($C$1)<ROWS($1:1)),ROWS($1:1),1) Just type various dates into C1 and watch how the display changes for them. If you need a different type of display, just let us know. Rick "capt" wrote in message ... Just one more question Rick, When I reach Dec-08, will Jan-08, at the top of the list, change to Jan-09 or do I have to continue with the list down as far as I wish? -- capt "capt" wrote: Rick, Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
#11
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Thanks Rick,
Iv done as you have explained. It has speeded the process up but still abit slow. I expect I have,as you mentioned, somewhere some voatile functions. I will have to investigate further. Many thanks for your help and patience. -- capt "Rick Rothstein (MVP - VB)" wrote: Well, if you have done nothing else but add the formulas, then I'd have to suspect them as being the culprit. More than likely, it is the YEAR, MONTH and NOW functions that are causing the problem. These are "volatile" functions and, as such, are recalculated **every** time any calculation in the worksheet is performed. I did a Google search on the words excel, volatile and functions and came up with three-quarters of a million hits for it (in case you want to research the volatile function issue on your own). In the formula I posted, there are 3 volatile function calls; but, with NOW being embedded within the other two, that may be multiplying the effect. Now, I am not an "Excel person" as such (my expertise, if you want to call it that, is in the compiled Visual Basic world), so I don't know this for sure, but with only 12 uses of my function, I find it hard to believe their volatile nature could impact the performance of your spreadsheet in any dramatic way. However, since you are seeing that effect, I guess I must be wrong in that conclusion. There is a way to minimize the problem though... reduce the number of direct volatile function calls. With my formulas, you could do something like this. In an out of the way location (hide the column afterwards if you don't want anyone seeing it), say Column Z, put =TODAY() in Z1, =YEAR(Z1) in Z2 and =MONTH(Z1) in Z3. Then change my formula to this... =DATE($Z$2-($Z$3<ROWS($1:1)),ROWS($1:1),1) and copy that down. This will reduce the number of volatile function calls within those 12 rows significantly and may help in your overall performance problem (or, at least, it will minimize the impact of my formulas on the problem). If you have any other references to NOW or NOW embedded in the YEAR or MONTH function in your spreadsheet, you can point them to these Z-column cells as well (remember to use absolute references if you are copying them down). Oh, by the way, in researching the volatile functions, I once came across this advice... if you had volatile function calls and removed them, it might be necessary to rebuild the dependency tree in order to make Excel "forget" about the volatile functions. You can do this by pressing Ctrl+Shift+Alt+F9 after you have finished editing out the volatile functions. Rick "capt" wrote in message ... Sorry Rick, Iv encounted another problem. When added the formula it has slowed down the calculation of the workbook. Is that because the formula has slowed it down or is it something else? -- capt "capt" wrote: No thats fine Rick, your first code will do nicely. Thank very much. -- capt "Rick Rothstein (MVP - VB)" wrote: No, it will not. When the date is January 1, 2009 is when the Jan-08 will change. Were you after some other functionality? Here is a formula that will show you how the display will look for various dates. Put this in some cell (other than C1) and copy down... =DATE(YEAR($C$1)-(MONTH($C$1)<ROWS($1:1)),ROWS($1:1),1) Just type various dates into C1 and watch how the display changes for them. If you need a different type of display, just let us know. Rick "capt" wrote in message ... Just one more question Rick, When I reach Dec-08, will Jan-08, at the top of the list, change to Jan-09 or do I have to continue with the list down as far as I wish? -- capt "capt" wrote: Rick, Fantanstic, it works well. Happy new year! -- capt "Rick Rothstein (MVP - VB)" wrote: Put this formula... =DATE(YEAR(NOW())-(MONTH(NOW())<ROWS($1:1)),ROWS($1:1),1) in the cell where your January date is supposed to be, copy it down through the next 11 cells and, finally, apply the Mar-01 date format from the Format Cells option to those 12 cells. Rick "capt" wrote in message ... Thanks Gary, The trouble its changing every date at once. Is there a way in order that the year changes when the month actually starts. In other words: because we are in the month of January cell A2 changes to Jan 08 the rest remain indicating 07 year. Then as we reach the end of Jan and go into Febuary then it changes to Feb 08 and it carrys on changing as we reach that month for real. I hope that makes sense? -- capt "Gary''s Student" wrote: Here is an example of monthly updating: In A1 enter: 39083 In A2 enter: =DATE(YEAR(A1),MONTH(A1)+1,DAY(A1)) and copy this formula down as far as you like. Select column A and: Format Cells... Number Custom mmm-yy -- Gary''s Student - gsnu200762 "capt" wrote: I have the following table: Jan-08 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Is there a formula that when we enter a new month, in this case Feb 07 it will change to Feb 08 and as we enter the following month in turn it up dates to 08 each time? -- capt |
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