matlabutb

1)

A=[3 7 15; 2 4 7;7 -2 9]
B=[19; 11; 13]
x = A\B
v1 = [5 3 7 8 11 13 9 17 4 2]
v2 = round(rand(10,1)*16+3)
vs=v1.*v2'
ss=dot(v1,v2')
v3 = [v1 v2']
v3(3:11)
v3(4:end)
v3([2 7 12])
M=diag(v1)
det(M)
trace(M)

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2)
subplot(2,1,1);
x=10:10:1000;
y=3*log(x);
plot(x,y,'--r')
xlabel('Osa x')
ylabel('Osa y')
title('Prubeh funkce y=3ln(x)')
grid on
legend('y')
subplot(2,1,2);
[x,y]=meshgrid([-3.1:0.1:3.1]);
z=3*sin(2*x.*y)-2*cos(3*x.*y);
plot3(x,y,z)
colormap autumn
view(-65,35)
grid off
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3)
h=get(handles.listbox1,'Value');
r=str2num(get(handles.edit1,'String'))
v=str2num(get(handles.edit2,'String'))

switch h

case 1
o=2*pi*r;
q1='Obvod kružnice je:'
q2=num2str(o)

case 2
o=pi*r.^2;
q1= 'Obsah kruhu je:'
q2=num2str(o)

case 3
o=pi*(r.^2)*v
q1='Objem valce je:'
q2=num2str(o)

otherwise
o=1;
q1='Chyba je'
q2=num2str(0)

end
set(handles.text3,'String',q1)
set(hanldes.edit3,'String',q2)

push button
clear all
clc
close

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2.
figure

subplot(2, 1, 1);
x = 10:1:1000;
y = 3.*log(x)
semilogx(x,y, '--r')
grid on
xlabel('osa x');
ylabel('osa y');
title('Prubeh funkce y = 3ln(x)');
legend('y')

subplot(2, 1, 2);
[x2, y2] = meshgrid(-3.1:0.1:3.1);
z = 3.*sin(2*x2*y2) - 2.*cos(3*x2*y2)
mesh(x2, y2, z)
colormap autumn
view(-65, 35)
grid off