Quiz

I like very much what I have seen so I put it on a site with the almost last moodle 1.8 release and everybody interested can play with it.

The moodle site address is

http://132.208.141.198/moodle_head/ 

you log as a teacher

I have set a simple quiz with one question in category New grammar

name:moodle pw: moodle

I do think the Tim will appreciate when coming back from his holidays on canal boat http://moodle.org/mod/forum/discuss.php?d=56777&parent=258820 

P.S. There a possible security issue so the added new functions should come from a Moodle release.

Here is an extract of the financial package from your zip if somebody want to try this new grammar

/**
 * DDB
 * Returns the depreciation of an asset for a specified period using
 * the double-declining balance method or some other method you specify.
 * @param  float   $cost    is the initial cost of the asset.
 * @param  float   $salvage is the value at the end of the depreciation (sometimes called the salvage value of the asset).
 * @param  integer $life    is the number of periods over which the asset is being depreciated (sometimes called the useful life of the asset).
 * @param  integer $period  is the period for which you want to calculate the depreciation. Period must use the same units as life.
 * @param  float   $factor  is the rate at which the balance declines. If factor is omitted, it is assumed to be 2 (the double-declining balance method).
 * @return float   the depreciation of n periods.
 */
 function financial_DDB($cost, $salvage, $life, $period, $factor = 2)
 {   $finclass = new Financial();
  return $finclass->DDB($cost, $salvage, $life, $period, $factor = 2);
 }
 
 /**
 * SLN
 * Returns the straight-line depreciation of an asset for one period.
 * @param  float   $cost    is the initial cost of the asset.
 * @param  float   $salvage is the value at the end of the depreciation (sometimes called the salvage value of the asset).
 * @param  integer $life    is the number of periods over which the asset is being depreciated (sometimes called the useful life of the asset).
 * @return float   the depreciation allowance for each period.
 */
 function financial_SLN($cost, $salvage, $life)
 {   $finclass = new Financial();
  return $finclass->SLN($cost, $salvage, $life);
 }
 
 /**
 * SYD
 * Returns the sum-of-years' digits depreciation of an asset for
 * a specified period.
 *
 *        (cost - salvage) * (life - per + 1) * 2
 * SYD = -----------------------------------------
 *                  life * (1 + life)
 *
 * @param  float   $cost    is the initial cost of the asset.
 * @param  float   $salvage is the value at the end of the depreciation (sometimes called the salvage value of the asset).
 * @param  integer $life    is the number of periods over which the asset is depreciated (sometimes called the useful life of the asset).
 * @param  integer $per     is the period and must use the same units as life. 
 */
 function financial_SYD($cost, $salvage, $life, $per)
 {   $finclass = new Financial();
  return $finclass->SYD($cost, $salvage, $life, $per);
 }
 
 /**
 * VDB
 * Returns the depreciation of an asset for any period you specify,
 * including partial periods, using the double-declining balance method
 * or some other method you specify. VDB stands for variable declining balance.
 *
 * @param  float   $cost         is the initial cost of the asset.
 * @param  float   $salvage      is the value at the end of the depreciation (sometimes called the salvage value of the asset).
 * @param  integer $life         is the number of periods over which the asset is depreciated (sometimes called the useful life of the asset).
 * @param  integer $start_period is the starting period for which you want to calculate the depreciation. Start_period must use the same units as life.
 * @param  integer $end_period   is the ending period for which you want to calculate the depreciation. End_period must use the same units as life.
 * @param  float   $factor       is the rate at which the balance declines. If factor is omitted, it is assumed to be 2 (the double-declining balance method). Change factor if you do not want to use the double-declining balance method.
 * @param  bool    $no_switch    is a logical value specifying whether to switch to straight-line depreciation when depreciation is greater than the declining balance calculation.
 * @return float   the depreciation of an asset.
 */
 function financial_VDB($cost, $salvage, $life, $start_period, $end_period, $factor = 2.0, $no_switch = false)
 {   $finclass = new Financial();
  return $finclass->VDB($cost, $salvage, $life, $start_period, $end_period, $factor, $no_switch);
 }
 
 /**
 * PV
 * Returns the present value of an investment. The present value is
 * the total amount that a series of future payments is worth now.
 * For example, when you borrow money, the loan amount is the present
 * value to the lender.
 * 
 * If rate = 0:
 * PV = -(FV + PMT * nper)
 *
 * Else
 *                                 /              nper \
 *                                 | 1 - (1 + rate)    |
 *       PMT * (1 + rate * type) * | ----------------- | - FV
 *                                 \        rate       /
 * PV = ------------------------------------------------------
 *                                nper
 *                       (1 + rate)
 *
 * @param  float   $rate is the interest rate per period.
 * @param  integer $nper is the total number of payment periods in an annuity.
 * @param  float   $pmt  is the payment made each period and cannot change over the life of the annuity.
 * @param  float   $fv   is the future value, or a cash balance you want to attain after the last payment is made.
 * @param  integer $type is the number 0 or 1 and indicates when payments are due.
 * @return float   the present value of an investment.
 */
 function financial_PV($rate, $nper, $pmt, $fv = 0.0, $type = 0)
 {   $finclass = new Financial();
  return $finclass->PV($rate, $nper, $pmt, $fv, $type);
 }
 
 /**

I have used the financial functions from EGM Mathematical Finance class created by Enrique García, to create calculated questions, but I can not edit them. Could you tell me what is the problem?