U = [62 100 150 190 210 220 230 250 265]; % U,I 换成自己数据
I = [.15 .11 .12 .14 .16 .17 .18 .20 .22];
uu = min(U):max(U);
ii = interp1(U,I,uu,'cubic');
plot(U,I,'ko',uu,ii,'k-');
axis([60 270 .1 .25])
grid on;
xlabel('U(V)');
ylabel('I(A)');
title('I=f(U)');
追问图形是差不多,但是虚线的网格线怎么加上去啊~
追答grid on;
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