for loop to subtract row from columns

Hi, probably to easy for you....

I want to substract a value column i in row 3 in a matrix of the depending column i and get a new matrix.

Matrix is 103x371

f.e. Value column 10 row 3 subtract with column 10 4:371

The values calculatet aren't right.

I think i have to implement another loop to choose also the values in the x direction (instead [4:371])

Thanks

clc
clear all
clear workspace 
load ('Punkte_Gesamt_D')
Punkte_Gesamt_D(Punkte_Gesamt_D==0)=nan

for i=1:103
Punkte_Gesamt_D_Wasserhoehe (i,:)= Punkte_Gesamt_D ([i],[4:371])-Punkte_Gesamt_D(3,i);
end

[Frederik Reese]

I only needet to change

Punkte_Gesamt_D ([i],[4:371])-Punkte_Gesamt_D(i,3)

[Dyuman Joshi]

"f.e. Value column 10 row 3 subtract with column 10 4:371"

You want to do this - matrix(4:371,10)-matrix(3,10) ?

Answer 1

[Matt J]

Punkte_Gesamt_D_Wasserhoehe([4:371],:)=...
    Punkte_Gesamt_D_Wasserhoehe([4:371],:)-Punkte_Gesamt_D_Wasserhoehe(3,:);

[Frederik Reese]

Thanks for your answer, but that doesnt work for me

[Matt J]

what does it do that isn't right?