playing_with_matrix(31)

clc;clear all;
%%a) create vectors
c=1:1:100;
d=1:2:200;
%%b)creating matrixes
C=make10x10(c);
D=make10x10(d);
disp(C);disp(D);

%%c)submatrix
E=C(3:5,5:8);
disp(E);
%%d)submatric with a step <>1
F=D(2:2:8,1:3:7);
disp(F);
%%e)matrix multiplication
G=E*F;
e=diag(G);
disp(e);

%%f)inversion and random numbers
random_matrix=0+10*rand(3,3);
H=G-random_matrix;
disp(det(H));
disp(inv(H));


function [C]=make10x10(c)
    j=1;
    C=zeros(10);
        for i=1:10
            C(i,:)=c(j:j+9);
            j=j+10;
        end
end