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# Thread: maximum, minimum and average of a matrix?

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1. Junior Member
Join Date
Feb 2011
Posts
7

## maximum, minimum and average of a matrix?

std::vector<std::vector<unsigned long> > matrix(15); // 15 rows
typedef std::vector<std::vector<unsigned long> >::iterator it_type;

it_type row = matrix.begin();

for (int w=0;w<10;w++)
{
//some lines of code
unsigned long num = x.to_ulong();
cout <<"Decimal form is: " << num<< end;
// if we've hit 15 items in the current row (i.e. 15 columns), then shift to the next row
if (row->size() == 15)
++row;

// add this to the next column in the current row
row->push_back(num);
}
// resize the last row
row->resize(15); // this will ensure that there are 15 columns in the last row

for(size_t i=0; i < matrix.size(); ++i)
{
for(size_t j=0; j < matrix[i].size(); ++j)
cout << matrix[i][j] << " ";
cout << endl;
}

Now I want to find maximum, minimum and average of this matrix. What shall I do?

3. ## Re: maximum, minimum and average of a matrix?

Iterate through the elements of the matrix and compare each against a reference value and if necessary update the reference value.

4. Junior Member
Join Date
Feb 2011
Posts
7

## Re: maximum, minimum and average of a matrix?

how? can you explain a little?

5. ## Re: maximum, minimum and average of a matrix?

Can you find maximum, minimum and average of the elements being in a plain integer array?

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