Given two matrices mat1 and mat2, the task is to find the sum of both matrices. Matrix addition is possible only when both matrix’s dimensions are the same. If both matrices have different dimensions then addition will not be possible.
Sum of Two Matrices using for Loop
First, we declare two matrices, matrix1 and matrix2. Next, we check both matrix dimension, if both matrix dimension is same then we proceed for sum of matrices, otherwise display an error message. To add both matrices, we use for loop. For loop iterate each matrix elements one by one, and perform sum on the elements.
Example: Sum of two matrices using for Loop in PHP.
<?php function sumTwoMatrices( $mat1 , $mat2 ) {
$rows = count ( $mat1 );
$columns = count ( $mat1 [0]);
// Sum Matrix Initialize with Zeros
$sum = array ();
for ( $i = 0; $i < $rows ; $i ++) {
for ( $j = 0; $j < $columns ; $j ++) {
$sum [ $i ][ $j ] = 0;
}
}
// Matrix Addition
for ( $i = 0; $i < $rows ; $i ++) {
for ( $j = 0; $j < $columns ; $j ++) {
$sum [ $i ][ $j ] = $mat1 [ $i ][ $j ] + $mat2 [ $i ][ $j ];
}
}
return $sum ;
} // First Matrix $matrix1 = array (
array (26, 14, 31),
array (41, 61, 11),
array (14, 12, 19)
); // Second Matrix $matrix2 = array (
array (11, 8, 27),
array (21, 15, 25),
array (22, 15, 21)
); // Get the first Matrix dimension $rows1 = count ( $matrix1 );
$columns1 = count ( $matrix1 [0]);
// Get the second Matrix dimension $rows2 = count ( $matrix2 );
$columns2 = count ( $matrix2 [0]);
// Check both matrix dimension is equal or not if ( $rows1 != $rows2 || $columns1 != $columns2 ) {
echo "Matrix dimension not Equal. Sum not possible" ;
} else {
// Sum of Matrices
$sum = sumTwoMatrices( $matrix1 , $matrix2 );
// Print the Sum Matrix
foreach ( $sum as $row ) {
echo implode( "\t" , $row ) . "\n" ;
}
} ?> |
37 22 58 62 76 36 36 27 40