close all 
clear all
load s1spa500.dat
load s1spa700.dat

grid
x5=s1spa500(:,1);
y5=s1spa500(:,2);
x7=s1spa700(:,1);
y7=s1spa700(:,2);

plot(x5,y5,'.k',x7,y7,'-k')
xlabel(' Lungimea de unda (microni)')
ylabel('Intensitate armonicii a doua (u. a.)')
gtext('500 mA (.)') 
gtext('700 mA (-)') 
