complexe Minimum-computation

Hallo,

I have to find a minimum in last 8 stored values in matrix actmin_all[8][256].
Is this correct, and can it be simpler realised:
for(j = 0; j < 7; j++)
{
for(i=0; i<256; i++)
{
if(actmin_all[j][i] < actmin_all[j+1][i])
{ actmin_all[j+1][i] = actmin_all[j][i]; }
}
}
Is the same way to compute a maximum? In matlab there are the functions like:
min(actmin_all), which gives the vector with minimum values; is there something like that in C++?
Thank you for any help or advice...

Greets,
Emir

dEUs

It should be
[cpp]for(j = 0; j < 8; j++) [/cpp]

Please use Codetags next time.
Wrong Forum, has nothing to do with MFC.
Moved

dEUs

I'm not sure what exactly you want to do with your code ... Sort your array? Or just get the smallest value in it?

I want just to get a min. values. On the way I wrote, the min. values are actually stored in last row... However I hope there is simpler way to do it...

Greets,
Emir.

dEUs

std::vector from the includefile vector with the function sort from the includefile algorithm?

btw: of what type is your matrix? int?

My matrix is double...
I need for example from matrix
2 2 2 2 2
3 3 3 3 3
1 2 1 2 1
4 5 4 2 4

Vektor with min. value:
1 2 1 2 1

My algorithm, that is with 2 for loops realised, do that (and it is realy 7, and not 8, like you wrote -> see the alg. exactly). I think it can and should be easier realised...

operator void

Off the top of my head & untested:

#include <algorithm>

typedef int Row[8];

bool rowLessThanRow(const Row& first, const Row& second)
{
    return first < second; // Pseudocode, put your comparison logic here
}

...

Row rows[256];
Row* min_row = std::min_element(rows, rows + 256, rowLessThanRow);
// *min_row is the "smallest" row

#include <algorithm>

wird das auch vom ti-compiler übersetzt, denn ich glaube, dass dieses include
zur stl (standard template library gehört ... und die wird am dsp nicht rennen - schätze ich, gibt es noch was anderes!)

Danke für die Hilfe...

LG

Helium

Das erste mal, das ich mit ner "freestanding Implementaion" zu tun habe. <algorithm> ist teil der STL, wird also nicht gehen.

Aber du kannst genau deinen Algorithmus nur mit nem größer als (>) verwenden, um das Maximum zu bestimmen.

Und es muss 8 heißen und nicht 7, falls die Information, dass es um 8 Zeilen geht richtig ist. Oder du schreibst <= 7, was aber eher unüblich ist.