root/matlab/blas_test.m @ 139

function test

vn = [5,50,200,500]
if 0
        et =zeros(1,4);
        et2 =zeros(1,4);

        idn = 1;
        vn = [5,50,200,500]
        for n= vn
                A=rand(n);B=rand(n);C=rand(n);
                tic;
                for i=1:10
                        C=matmult(A,B);
                end
                et(idn) = toc;

                tic;
                for i=1:10
                        C=A*B;
                end
                et2(idn) = toc;

                idn =idn+1;
        end
        save blas_test
else
        load blas_test
end

itload('../blas_test.it')

figure
plot(vn,et)
hold on
plot(vn,et2,'r');
plot(vn,exec_times,'--')
plot(vn,exec_times_b,'r--')
plot(vn,exec_times_c,'g--')
title('For cycle vs. BLAS');
ylabel('execution time');
xlabel('matrix size');
set(gca,'YScale','log')
set(gca,'XScale','log')
set(gcf,'PaperPositionMode','auto');

legend('matlab for','matlab blas','IT++ for','IT++ blas','C array')


function C=matmult(A,B)
for i=1:size(A,1)
        for j=1:size(A,2)
                sum=0;
                for k=1:size(A,2)
                        sum=sum+A(i,k)*B(k,j);
                end
                C(i,j)=sum;
        end
end