How to get minimum value from 2D array in c# and the indices of that cell? -

i want minimum value 2 dimensional array [1024,9] ,and want position of minimum value.

hint: last column flag "if flag == 0 : check row, else : skip row"

i tried cod ,but did not me ...

float min = fill_file[0, 0];             int ind = 0;             int ind2 = 0;              (int = 0; < 1024; i++)             {                 (int j = 0; j < 8; j++)                 {                     if (fill_file[i, j] < min && fill_file[i, 8] == 0)                     {                         min = fill_file[i, j];                         ind2 = i;                         ind = j;                     }                 }                } 

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this code based on request

int t = 0;         while (t < 1024)         {             float min = fill_file[0, 0];             int ind = 0;             int ind2 = 0;              (int = 0; < 1024; i++)             {                 (int j = 0; j < 8; j++)                 {                     if (fill_file[i, j] < min && fill_file[i, 8] == 0)                     {                         min = fill_file[i, j];                         ind2 = i;                         ind = j;                     }                 }                }              machens[ind] = machens[ind] + min;             fill_file[ind2, 8] = 1;              (int r = 0; r < 1024; r++)             {                 if (fill_file[r, 8] != 1)                     fill_file[r, ind] = fill_file[r, ind] + min;             }              t++;         }//end while 

firstly:

if happens none of rows have "use row" flag set 0 (with 0 meaning "use row"), wrong result. guess never happen data?

secondly:

if fill_file[0,8] nonzero, still initialising min fill_file[0,0] though flag says shouldn't use row. in case, if fill_file[0,0]happens less values in of rows fill_file[row,8] 0 wrong result.

i tempted initialise min float.maxvalue , ind , ind2 -1 each, know if haven't been updated. , call them minrow , mincol.

thirdly:

there's obvious optimisation: if [row,8] nonzero, there's no point in running inner iteration row.

putting together:

float minvalue = float.maxvalue; int mincol = -1; int minrow = -1;  (int row = 0; row < 1024; row++) {     if (fill_file[row, 8] == 0)     {         (int col = 0; col < 8; col++)         {             if (fill_file[row, col] < minvalue)             {                 minvalue = fill_file[row, col];                 minrow = row;                 mincol = col;             }         }     } }  // if minrow < 0, no valid data exists. // otherwise, fill_file[minrow, mincol] contains minval