worksheet-function

How do I calculate Excel's XIRR function using C#? According to XIRR function openoffice documentation (formula is same as in excel) you need to solve for XIRR variable in the following f(xirr) equation: You can calculate xirr value by: calculating derivative of above function -> f '(xirr) after having f(xirr) and f'(xirr) you can solve for xirr value by using iterative Newton's method - famous formula-> EDIT I've got a bit of time so, here it is - complete C# code for XIRR calculation: class xirr { public const double tol = 0.001; public delegate double fx(double x); public static fx

I would like to write an IF statement, where the cell is left blank if the condition is FALSE. Note that, if the following formula is entered in C1 ( for which the condition is false ) for example: =IF(A1=1,B1,"") and if C1 is tested for being blank or not using =ISBLANK(C1) , this would return FALSE , even if C1 seems to be blank. This means that the =IF(A1=1,B1,"") formula does not technically leave the cells blank if the condition is not met. Any thoughts as to a way of achieving that? Thanks, Portland Runner Try this instead =IF(ISBLANK(C1),TRUE,(TRIM(C1)="")) This will return true for

I have 2 worksheets: Summary and SERVER-ONE . In cell A5 on the Summary worksheet, I have added the value SERVER-ONE . Next to it, in cell B5 , I would like a formula that uses the value in A5 to display the value of G7 in the worksheet of the same name ( SERVER-ONE ). I could manually use: ='SERVER-ONE'!G7 However I would like this to be dynamic, so I can easily add more worksheets. I tried the obvious with no joy: ='A5'!G7 Any suggestions? You can use the formula INDIRECT() . This basically takes a string and treats it as a reference. In your case, you would use: =INDIRECT("'"&A5&"'!G7") The

I have a simple problem that I'm hoping to resolve without using VBA but if that's the only way it can be solved, so be it. I have a file with multiple rows (all one column). Each row has data that looks something like this: 1 7.82E-13 >gi|297848936|ref|XP_00| 4-hydroxide gi|297338191|gb|23343|randomrandom 2 5.09E-09 >gi|168010496|ref|xp_00| 2-pyruvate etc... What I want is some way to extract the string of numbers that begin with "gi|" and end with a "|". For some rows this might mean as many as 5 gi numbers, for others it'll just be one. What I would hope the output would look like would be

I use the following function =DAYS360(A2, A35) to calculate the difference between two dates in my column. However, the column is ever expanding and I currently have to manually change 'A35' as I update my spreadsheet. Is there a way (in Google Sheets) to find the last non-empty cell in this column and then dynamically set that parameter in the above function? There may be a more eloquent way, but this is the way I came up with: The function to find the last populated cell in a column is: =INDEX( FILTER( A:A ; NOT( ISBLANK( A:A ) ) ) ; ROWS( FILTER( A:A ; NOT( ISBLANK( A:A ) ) ) ) ) So if you

In column A I have 20000 rows with filename with file path "C:\person\microsoft\ygkyg\mmddyy\filename.xls" "\server-41\performance\mmddyy\filename.doc" ..... etc. In column B I just want to get the parent folder path. Could someone help me with the formula? I tried this but it's giving me the file name. =MID(a1,FIND(CHAR(1), SUBSTITUTE(a1,"\",CHAR(1),LEN(a1)-LEN(SUBSTITUTE(a1,"\",""))))+1,LEN(a1)) This works. =MID(A1,1,LEN(A1)-LEN(MID(A1,FIND(CHAR(1),SUBSTITUTE(A1,"\",CHAR(1),LEN(A1)-LEN(SUBSTITUTE(A1,"\",""))))+1,LEN(A1)))) The above was my original answer. Neil simplified the expression

How do I obtain a reference to the current cell? For example, if I want to display the width of column A, I could use the following: =CELL("width", A2) However, I want the formula to be something like this: =CELL("width", THIS_CELL) Rick Teachey Create a named formula called THIS_CELL In the current worksheet, select cell A1 (this is important!) Open Name Manager (Ctl+F3) Click New... Enter "THIS_CELL" (or just "THIS", which is my preference) into Name: Enter the following formula into Refers to: =!A1 NOTE: Be sure cell A1 is selected . This formula is relative to the ActiveCell. Under Scope:

I have a column like the following: 1 red 2 blue 3 red 4 5 blue 6 7 8 white The blanks refer to the record above it. So #4 would be associated with red and 6 and 7 would be blue. Is there an easy way to fill in the blanks for entire column? Select A1:A8 . Press F5 to show the Goto dialog. Click Special ..... Select Blanks and click OK. That will select a noncontiguous range of blank cells. Then, without selecting anything else, type =A3 and press control + enter . That will enter an array formula in all the blank cells referring to the cell above it. Reselect A1:A8 , and Edit - Copy . Then