不过这只蝴蝶没有胡须哦!希望高手能把两个胡须添上去!
SAS程序:DATA Butterfly;
DO t=-400 TO 4 BY 0.01;
a = cos(t);
b = cos(4*t);
x = sin(t)*(exp(a)-2*b-(sin(t/12)*sin(t/12)*sin(t/12)*sin(t/12)*sin(t/12)));
y = cos(t)*(exp(a)-2*b-(sin(t/12)*sin(t/12)*sin(t/12)*sin(t/12)*sin(t/12)));
OUTPUT;
END;
SYMBOL C=GREEN;
PROC GPLOT ;
PLOT y*x ;
RUN;
13楼ziyenano 为蝴蝶添加了胡须!赞一个!