Todo List

PHPExcel_Shared

# Todo List

## PHPExcel_Calculation

### PHPExcel_Calculation_Statistical::BINOMDIST()

- Cumulative distribution function

### PHPExcel_Calculation_Statistical::CRITBINOM()

- Warning. This implementation differs from the algorithm detailed on the MS web site in that $CumPGuessMinus1 = $CumPGuess - 1 rather than $CumPGuess - $PGuess This eliminates a potential endless loop error, but may have an adverse affect on the accuracy of the function (although all my tests have so far returned correct results).

### PHPExcel_Calculation_Statistical::LOGINV()

- Try implementing P J Acklam's refinement algorithm for greater accuracy if I can get my head round the mathematics (as described at) http://home.online.no/~pjacklam/notes/invnorm/

## Math_Stats

### Base::interquartileMean()

- need to double check the equation

### Base::percentile()

- need to double check generality of the algorithm

### Base::quartileSkewnessCoefficient()

- need to double check the equation

### Base::quartileVariationCoefficient()

- need to double check the equation

Documentation generated on Sun, 27 Feb 2011 16:37:34 -0800 by phpDocumentor 1.4.3