display specific values form sorted array - arrays

Question

this is my sorted array
$sortedArray = array($value_one_fin,$value_two_fin,$value_three_fin,$value_four_fin,$value_five_fin,$value_six_fin,$value_seven_fin,$value_eight_fin,$value_nine_fin,$value_ten_fin,$value_eleven_fin,$value_twelve_fin,$value_thirteen_fin,$value_fourteen_fin,$value_fifteen_fin,$value_sixteen_fin,$value_seventeen_fin,$value_eighteen_fin,$value_nineteen_fin,$value_twenty_fin,$value_twentyone_fin,$value_twentytwo_fin,$value_twentythree_fin,$value_twentyfour_fin);
$result=findClosest($sortedArray,$num1);
this is the variable where i store my entered number
$num1
what i want to do is to display values from sorted array in the manner Buy at / above: 102.51 Targets: 105,107.58,110.19,112.83
Stoploss : 100
in the above example i have entered 100 as $num1. as per calc the $result is also 100 so it has to display next greater closest number which is 102.51 and in stop loss it shuld display next smaller closest number
CONDITION
1>if entered number $num1 is greater than $result then display the next greater closest number from sorted array
2>if entered number $num1 is equal to $result then display the next greater closest number from sorted array
pls help me with this how can i do this im doing this
Buy At/Above ";if ($num1>$result) {echo "$result ";}if ($num1=$result) {echo "$result ";}if ($num1<$result) {echo "$result ";}echo "for Targets"; if ($result<$value_one_fin){echo " $value_one_fin,";}
if ($result<$value_two_fin){echo " $value_two_fin,";}
if ($result<$value_three_fin){echo " $value_three_fin,";}
if ($result<$value_four_fin){echo " $value_four_fin,";}
if ($result<$value_five_fin){echo " $value_five_fin,";}
if ($result<$value_six_fin){echo " $value_six_fin,";}
if ($result<$value_seven_fin){echo " $value_seven_fin,";}
if ($result<$value_eight_fin){echo " $value_eight_fin,";}
if ($result<$value_nine_fin){echo " $value_nine_fin,";}
if ($result<$value_ten_fin){echo " $value_ten_fin,";}
if ($result<$value_eleven_fin){echo " $value_eleven_fin,";}
if ($result<$value_twelve_fin){echo " $value_twelve_fin,";}
if ($result<$value_thirteen_fin){echo " $value_thirteen_fin,";}
if ($result<$value_fourteen_fin){echo " $value_fourteen_fin,";}
if ($result<$value_fifteen_fin){echo " $value_fifteen_fin,";}
if ($result<$value_sixteen_fin){echo " $value_sixteen_fin,";}
if ($result<$value_seventeen_fin){echo " $value_seventeen_fin,";}
if ($result<$value_eighteen_fin){echo " $value_eighteen_fin,";}
if ($result<$value_nineteen_fin){echo " $value_nineteen_fin,";}
if ($result<$value_twenty_fin){echo " $value_twenty_fin,";}
if ($result<$value_twentyone_fin){echo " $value_twentyone_fin,";}
if ($result<$value_twentytwo_fin){echo " $value_twentytwo_fin,";}
if ($result<$value_twentythree_fin){echo " $value_twentythree_fin,";}
if ($result<$value_twentyfour_fin){echo " $value_twentyfour_fin";}
but its not working and also how to display STOP LOSS

Answer 1

Apologies if I've misunderstood the question - I'm not 100% clear what you're trying to achieve, but I'll try to be helpful.
It looks as though your array is sorted smallest to largest. So to find the first value greater than or equal to $num1, simply loop through your array from beginning to end, and stop when you find a value >= $num1 e.g.
function findClosest($sortedArray, $num1) {
foreach ($sortedArray as $value) {
if ($value >= $num1) {
return $value;
}
}
}
To find the closest number less than or equal to $num1, loop through the array from the end to the beginning e.g.
function findClosestLessThanOrEqual($sortedArray, $num1) {
for ($i = sizeOf($sortedArray) - 1; $i >= 0; $i--) {
if ($sortedArray[$i] <= $num1) {
return $sortedArray[$i];
}
}
}
There are faster ways to search a large array, but if your array only contains 24 values I think that's the simplest way.

Answer 2

Just needs a slight tweak to get the first 5 items >= $num1:
function find5Closest($sortedArray, $num1) {
for ($i = 0; $i < sizeOf($sortedArray); $i++) {
if ($sortedArray[$i] >= $num1) {
return array_slice($sortedArray, $i, 5);
}
}
}
This should return an array up to 5 values. If there are only 3 values >= $num1, then it will only return 3 values; if no values are >= $num1 it will return an empty array.
Similarly:
function find5ClosestLessThanOrEqual($sortedArray, $num1) {
for ($i = sizeOf($sortedArray) - 1; $i >= 0; $i--) {
if ($sortedArray[$i] <= $num1) {
return array_slice($sortedArray, min(0, $i-4), 5);
}
}
}