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Automating Polynomial Order Selection in Linest
This is a follow up question to an earlier post about Linest. Want to
automate the order selection of the polynomial so an end user can quickly change a cell reference to view the results of different orders (2-6). The formula I am working with is... =LINEST(Y's, X's^{1,2,3,4}), 1, 0) -- for a 4th order polyn I want to be able to enter a value in a seperate cell which updates the X's^{order} argument to reflect the new order e.g. if the new order is 2 then that part of the formula updates to X's^{1,2} and so on. Have poked around google and MS help to no avail. Thanks in advance Nick Flyger |
#2
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Automating Polynomial Order Selection in Linest
Try this, were A1 contains the order polynomial you want.
LINEST(Y's, X's^ROW(INDIRECT("1:"&A1)), 1, 0) cheers... Nick Flyger wrote: This is a follow up question to an earlier post about Linest. Want to automate the order selection of the polynomial so an end user can quickly change a cell reference to view the results of different orders (2-6). The formula I am working with is... =LINEST(Y's, X's^{1,2,3,4}), 1, 0) -- for a 4th order polyn I want to be able to enter a value in a seperate cell which updates the X's^{order} argument to reflect the new order e.g. if the new order is 2 then that part of the formula updates to X's^{1,2} and so on. Have poked around google and MS help to no avail. Thanks in advance Nick Flyger |
#3
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Automating Polynomial Order Selection in Linest
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#4
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Automating Polynomial Order Selection in Linest
Try it out and for this solution to work it need to be: LINEST(Y's, X's^TRANSPOSE(ROW(INDIRECT("1:"&A1))), 1, 0) wrote: Try this, were A1 contains the order polynomial you want. LINEST(Y's, X's^ROW(INDIRECT("1:"&A1)), 1, 0) cheers... Nick Flyger wrote: This is a follow up question to an earlier post about Linest. Want to automate the order selection of the polynomial so an end user can quickly change a cell reference to view the results of different orders (2-6). The formula I am working with is... =LINEST(Y's, X's^{1,2,3,4}), 1, 0) -- for a 4th order polyn I want to be able to enter a value in a seperate cell which updates the X's^{order} argument to reflect the new order e.g. if the new order is 2 then that part of the formula updates to X's^{1,2} and so on. Have poked around google and MS help to no avail. Thanks in advance Nick Flyger |
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