>> plot(x,y) >> plot(x,y,’g’,’markersize’,25) >> plot(x,y,’g.’,’markersize’,25)区别[亲测有效]

data=nihe030501
x=data(:,1)
y=data(:,2)
%x =[1.6000 2.0000 2.6000 3.0000 3.5000 3.9000 4.5000 4.6000 4.8000 5.0000 5.1000 5.3000 5.4000 5.6000 5.8000 6.0000 6.0000 6.1000 6.3000 6.5000 6.5000 6.7000 7.0000 7.1000 7.3000 7.3000 7.3000 7.7000 7.7000 7.8000 7.9000 8.0000 8.1000 8.3000 8.4000 8.4000 8.5000 8.7000 8.8000 9.0000];
x=x’
%y =[0.9930 0.9831 0.9731 0.9631 0.9532 0.9432 0.9333 0.9233 0.9133 0.9034 0.8934 0.8835 0.8735 0.8635 0.8536 0.8436 0.8337 0.8237 0.8137 0.8038 0.7938 0.7839 0.7739 0.7639 0.7540 0.7440 0.7341 0.7241 0.7141 0.7042 0.6942 0.6843 0.6743 0.6643 0.6544 0.6444 0.6345 0.6245 0.6145 0.6046];
y=y’
plot(x,y)

plot(x,y,‘g’,‘markersize’,25)

plot(x,y,‘g.’,‘markersize’,25)