Re: [libreoffice-users] First occurrence of a negative number in a column
Den 23.01.2013 14:32, skreiv Brian Barker: At 13:44 23/01/2013 +0100, Kolbjørn Stuestøl wrote: Den 23.01.2013 07:29, skreiv Brian Barker: At 22:57 22/01/2013 +0100, Kolbjørn Stuestøl wrote: Is there any way to find the first occurrence of a number less (or greater) than a given number in an unsorted array or a column? Example: A1:A31 contains a list of temperatures a given month. I would like to find the first day the temperature is below 0 degrees (metric). What happens if there is no day in the month when the temperature was negative? Let's say you want the value zero for the resulting day number in this case. This is a little messy, but it works: o In B1, enter =A10 and fill it down the column to B31. This generates TRUE for your negative values and FALSE otherwise. o In your result cell, enter =N(MATCH(TRUE;B1:B31;0)) . The MATCH() function searches for the first TRUE value in the column B values and returns the relative position in the array of the first match. (Note that this is not necessarily the row number, though will be in your example.) This would return the #N/A error if there is no negative temperature; the N() function makes no change to real dates but converts this error to zero. Alas the N() function does not works as supposed. It returns #N/A if there are no numbers below zero. I have to figure out a solution. Oh dear: sorry. It indeed appears that the behaviour of N() was changed (between versions 3.5. and 3.6) and it no longer works as I'd imagined. So you'll need something (even messier) such as =IF(ISERROR(MATCH(TRUE;B1:B31;0));0;MATCH(TRUE;B1:B31;0)) instead. Thanks. I think this will help me out. Although I would have preferred a simpler version :-) I am new to LibreOffice. I do have a working program calculating meteorological statistics written in a Pascal variant many years ago. But rewriting it in Calc 4.0 just to learn a bit about this program too. Kolbjoern I trust this helps. Brian Barker -- For unsubscribe instructions e-mail to: users+h...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted
Re: [libreoffice-users] First occurrence of a negative number in a column
Hi :) Working out the first day temperatures plummeted below zero here was the only day this year that i got a chance to sleep outdoors. I completely missed all of the long hot summer due to moving. I got a bit of a surprise when i poked my head out of ny bivvie and saw the landscape covered in frost! Regards from Tom :) From: Kolbjørn Stuestøl kolbjo...@stuestoel.no To: users@global.libreoffice.org Sent: Wednesday, 23 January 2013, 15:16 Subject: Re: [libreoffice-users] First occurrence of a negative number in a column Den 23.01.2013 14:32, skreiv Brian Barker: At 13:44 23/01/2013 +0100, Kolbjørn Stuestøl wrote: Den 23.01.2013 07:29, skreiv Brian Barker: At 22:57 22/01/2013 +0100, Kolbjørn Stuestøl wrote: Is there any way to find the first occurrence of a number less (or greater) than a given number in an unsorted array or a column? Example: A1:A31 contains a list of temperatures a given month. I would like to find the first day the temperature is below 0 degrees (metric). What happens if there is no day in the month when the temperature was negative? Let's say you want the value zero for the resulting day number in this case. This is a little messy, but it works: o In B1, enter =A10 and fill it down the column to B31. This generates TRUE for your negative values and FALSE otherwise. o In your result cell, enter =N(MATCH(TRUE;B1:B31;0)) . The MATCH() function searches for the first TRUE value in the column B values and returns the relative position in the array of the first match. (Note that this is not necessarily the row number, though will be in your example.) This would return the #N/A error if there is no negative temperature; the N() function makes no change to real dates but converts this error to zero. Alas the N() function does not works as supposed. It returns #N/A if there are no numbers below zero. I have to figure out a solution. Oh dear: sorry. It indeed appears that the behaviour of N() was changed (between versions 3.5. and 3.6) and it no longer works as I'd imagined. So you'll need something (even messier) such as =IF(ISERROR(MATCH(TRUE;B1:B31;0));0;MATCH(TRUE;B1:B31;0)) instead. Thanks. I think this will help me out. Although I would have preferred a simpler version :-) I am new to LibreOffice. I do have a working program calculating meteorological statistics written in a Pascal variant many years ago. But rewriting it in Calc 4.0 just to learn a bit about this program too. Kolbjoern I trust this helps. Brian Barker -- For unsubscribe instructions e-mail to: users+h...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted -- For unsubscribe instructions e-mail to: users+h...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted
[libreoffice-users] First occurrence of a negative number in a column
Is there any way to find the first occurrence of a number less (or greater) than a given number in an unsorted array or a column? Example: A1:A31 contains a list of temperatures a given month. I would like to find the first day the temperature is below 0 degrees (metric). Kolbjoern Stuestoel -- For unsubscribe instructions e-mail to: users+h...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted
Re: [libreoffice-users] First occurrence of a negative number in a column
At 22:57 22/01/2013 +0100, Kolbjørn Stuestøl wrote: Is there any way to find the first occurrence of a number less (or greater) than a given number in an unsorted array or a column? Example: A1:A31 contains a list of temperatures a given month. I would like to find the first day the temperature is below 0 degrees (metric). What happens if there is no day in the month when the temperature was negative? Let's say you want the value zero for the resulting day number in this case. This is a little messy, but it works: o In B1, enter =A10 and fill it down the column to B31. This generates TRUE for your negative values and FALSE otherwise. o In your result cell, enter =N(MATCH(TRUE;B1:B31;0)) . The MATCH() function searches for the first TRUE value in the column B values and returns the relative position in the array of the first match. (Note that this is not necessarily the row number, though will be in your example.) This would return the #N/A error if there is no negative temperature; the N() function makes no change to real dates but converts this error to zero. You may choose to hide column B, of course - or you could put its values away somewhere else on the sheet or even on a different sheet. Incidentally, you are unlikely to get temperatures below 0 degrees (metric), as the SI temperature scale is kelvin, and its zero is the absolute zero of temperature! But yes: I appreciate that you mean the celsius scale. ;^) I trust this helps. Brian Barker -- For unsubscribe instructions e-mail to: users+h...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted
