Min and max number from every row in matrix

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I have matrix, and the idea is to write a code that gives max and min number from every row, without any function, just pure logic. For example:

Max Numbers should be: 567, 789, 900, 906, 897

Min Numbers should be: 45, 100, 191, 323, 101

[45, 456, 321, 344, 567],
[100, 434, 173, 400, 789],
[191, 211, 457, 809, 900],
[431, 323, 432, 805, 906],
[708, 232, 897, 101, 696]
$arrNxm = [
  [45, 456, 321, 344, 567],
  [100, 434, 173, 400, 789],
  [191, 211, 457, 809, 900],
  [431, 323, 432, 805, 906],
  [708, 232, 897, 101, 696]
];

$rows = 5;
$cols = 5;

$intValue = 1;

$max = $arrNxm[0][0];

for($row = 0; $row < $rows; $row++)
{
  $max = $arrNxm[$row][0];
  for($col = 0; $col < $cols; $col++)
  {
    if($arrNxm[$row][$col] > $max)
    {
      $max = $arrNxm[$row][$col];
    }
  }
}


echo "<pre>";
var_dump($max);
echo "</pre>";

When I run my code, I get only one number, and I cannot figure what I've suppose to do to get the right output.

Here you go:

$arrNxm = [
  [45, 456, 321, 344, 567],
  [100, 434, 173, 400, 789],
  [191, 211, 457, 809, 900],
  [431, 323, 432, 805, 906],
  [708, 232, 897, 101, 696]
];

$row = 5;
$col = 5;
$min = $max = array();

for( $i = 0; $i < $row; $i++ ) {
    $min_val = $max_val = $arrNxm[ $i ][0];    
    for( $j = 0; $j < $col; $j++ ) {
        //echo $arrNxm[ $i ][ $j ]." ";
        if( $min_val > $arrNxm[ $i ][ $j ] ) {
            $min_val = $arrNxm[ $i ][ $j ];
        }

        if( $max_val < $arrNxm[ $i ][ $j ] ) {
            $max_val = $arrNxm[ $i ][ $j ];
        }
    }
    // echo $min_val.PHP_EOL;
    $min[] = $min_val;
    $max[] = $max_val;
}
print_r( $min );
print_r( $max );

Output:

Array
(
    [0] => 45
    [1] => 100
    [2] => 191
    [3] => 323
    [4] => 101
)
Array
(
    [0] => 567
    [1] => 789
    [2] => 900
    [3] => 906
    [4] => 897
)

How can I find the maximum value and its index in array in MATLAB , How do you find the maximum value in a row in Matlab? how to find min or max value in each row of a matrix and its index, if a matrix is 3x2 it will find the min in first row Follow 1,150 views (last 30 days)

You are rewritting the same variable with the max for each row. That's why in the end you will always have one number.

Instead you should make an array for results and store the max for each row separately like this:

$max = [];
for($row = 0; $row < $rows; $row++)
{
  $max[$row] = $arrNxm[$row][0];
  for($col = 0; $col < $cols; $col++)
  {
    if($arrNxm[$row][$col] > $max[$row])
    {
      $max[$row] = $arrNxm[$row][$col];
    }
  }
}

Find maximum element of each row in a matrix, How do you find the minimum value in a row in Matlab? What about multiple min/max numbers in the matrix? If there are multiple min/max numbers in the matrix, the formula would return values from all the rows containing the min/max. See the following illustration that uses ‘Max’. Sheets Formula to Find Min, Max in a Matrix and Output a Value from the Same Row. I have a 3×3 matrix (B3:D5) which

With 2 foreach loops and a couple of terney if's

$arrNxm = [
  [45, 456, 321, 344, 567],
  [100, 434, 173, 400, 789],
  [191, 211, 457, 809, 900],
  [431, 323, 432, 805, 906],
  [708, 232, 897, 101, 696]
];

foreach ($arrNxm as $rkey => $row) {
    foreach ( $row as $ckey => $col) {
        // init this row in the results arrays
        if ($ckey == 0) { $min[$rkey] = PHP_INT_MAX; $max[$rkey] = 0; }              

        $min[$rkey] = $min[$rkey] > $col ? $col : $min[$rkey];
        $max[$rkey] = $max[$rkey] < $col ? $col : $max[$rkey];
    }
}

echo 'MAX' . PHP_EOL . print_r($max,1);
echo 'MIN' . PHP_EOL . print_r($min,1);

RESULT

MAX
Array
(
    [0] => 567
    [1] => 789
    [2] => 900
    [3] => 906
    [4] => 897
)
MIN
Array
(
    [0] => 45
    [1] => 100
    [2] => 191
    [3] => 323
    [4] => 101
)

Min and max number from every row in matrix, How do you find the maximum of a matrix in python? Do you want to create 2 additional columns showing the min and max for each row? If yes, i do not think that is possible. What is possible though is to get the min or max for each row in the Grand Total column. If that works for you, share the link from where i can download your PBI file.

i would like to suggest this

$arrNxm = [
  [45, 456, 321, 344, 567],
  [100, 434, 173, 400, 789],
  [191, 211, 457, 809, 900],
  [431, 323, 432, 805, 906],
  [708, 232, 897, 101, 696]
];
$max = array();
$min = array();
foreach ($arrNxm as $key) {
    array_push($max, max($key));
    array_push($min, min($key));
}

how to find min or max value in each row of a matrix and its index, if , How do you find the index of a max value in Matlab? The very simple code: //FINDING MAXIMUM FROM EACH ROW OF MATRIX #include<stdio.h> #define m 20 main(){ int a[m][m],i,j=0,r,max[10],c; printf("Enter the number of

CALCULATION OF MAXIMUM VALUE IN EVERY ROW, Find row with maximum and minimum number of zeroes in given Matrix · Find Maximum side length of square in a Matrix · Find pair with maximum difference in​  Given a Matrix A with m rows, and n columns find the mininum (or maximum) value and the associated row and column number This article summarises my solution to this problem (which, hopefully this will also come in hadny to you!).

Max in every column and Min in every row, Here you go: $arrNxm = [ [45, 456, 321, 344, 567], [100, 434, 173, 400, 789], [191​, 211, 457, 809, 900], [431, 323, 432, 805, 906], [708, 232, 897  suppose there is a matrix of 3x3 size i want to calculate the maximum value in every row. ex: 3 4 5 Shadowing the built-in function "max" by a variable is a

Program to find the minimum and maximum element in each row of , how to find min or max value in each row of a matrix and its index, if a Every element is maximum and minimum, how to extract their indices? [m,idx] = max(I,[],2); m gives you the maximum value in each row and idx gives you the column in which it occurs. I used this in my other response to you about fcm()

Comments
  • First of all, it's max and min for every row and not column !
  • var_dump($max) in inner for.
  • A slight change would skip 1 more comparison, change inner loop to for($col = 1 as you always set the value from 0 so why compare it against itself.
  • Code it's okay, but if you look carefully my question, you will see that I mentioned that code needs to be written using only logic, without any array function.