delphi - Easiest way to find the mean of a dynamic array -

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i have created dynamic array, , have passed values it. there shortcut finding mean of dynamic array. 

var   themin, themax: integer;     x: array of integer; //dynamic array declaration .... themin := minintvalue(x);//i able retrieve minium value of dynamic array themax := maxintvalue(x);//i able retrieve maximum value of dynamic array

is there other way mean using math library.

it easy write such function.

function mean(const data: array of integer): double; overload; var   i: integer; begin   result := 0.0;   := low(data) high(data)     result := result + data[i];   result := result / length(data); end;

i overloaded sit alongside same named functions in math unit.

if wish use built in library code can use sumint math unit:

themean := sumint(x) / length(x);

sumint performs summation using integer accumulator. faster bespoke function uses floating point accumulator. however, integer accumulator potentially subject overflow may off-putting. on other hand, integer accumulator potentially more accurate floating point accumulator. depending on usage requirements these issues may important you.

in bother cases, if input array of length 0 runtime floating point divide 0 error raised.


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