Question

Matlab中??? Error: File: C:\MATLAB7\work\fitness.m Line: 2 Column: 13 Missing MATLAB operator.

想要由以下的数据及其程序来进行绘图，但是一直出现这个错误，求高手解答！！！！！

t=1:1:30
x21=0.7074 0.4421 0.5748 0.5748 0.3537 0.4864 0.4864 0.7074 0.2653 0.8401 0.1769 0.8843 0.2653 0.4864 0.3095 0.4864 0.3979 0.5748 0.5748 0.4421 0.5306 0.2653 1.0169 0.8401 0.6190 0.7958 0.2211 0.4421 0.1769 0.1326 0.4421 0.5748 0.7074 0.5748 0.6632 0.8843 0.6190 0.1769 0.1326 0.4864 0.5748 0.3537 0.5306 0.7958 0.3979 0.3537 0.7516 0.3095 0.3979 0.6190 0.4421 0.9285 0.4864 0.1769 0.6632 0.4864 0.2211 0.6632 0.5306 0.4421
y21=0.6632 0.4864 0.5306 0.5748 0.3979 0.4864 0.5306 0.7958 0.2653 0.8843 0.2653 0.7516 0.2211 0.6190 0.2211 0.4421 0.5306 0.4864 0.5748 0.4864 0.4864 0.3979 0.9727 0.7074 0.8401 0.4864 0.2211 0.4421 0.1326 0.1326 0.4421 0.6190 0.7074 0.7958 0.7958 0.9285 0.5748 0.1769 0.1326 0.5306 0.5748 0.3537 0.4421 0.7516 0.4421 0.4864 0.7074 0.3537 0.4421 0.5748 0.5306 0.9285 0.4864 0.2653 0.7958 0.4864 0.2653 0.7516 0.3979 0.3979

subplot(3,2,1)

plot(t,x21,'r:o',t,y21,'b:+')
set(gca,'xtick',[0 5 10 15 20 25 30])

Answer 1

那个错和画这个图没有任何关系，你的数据有60点，但是t只有30点，把t变成1：60就行了：

Answer 2

% 画出前30个数据的图形
t = 1:1:30;
x21 = [0.7074 0.4421 0.5748 0.5748 0.3537 0.4864...
0.4864 0.7074 0.2653 0.8401 0.1769 0.8843...
0.2653 0.4864 0.3095 0.4864 0.3979 0.5748...
0.5748 0.4421 0.5306 0.2653 1.0169 0.8401...
0.6190 0.7958 0.2211 0.4421 0.1769 0.1326...
0.4421 0.5748 0.7074 0.5748 0.6632 0.8843...
0.6190 0.1769 0.1326 0.4864 0.5748 0.3537...
0.5306 0.7958 0.3979 0.3537 0.7516 0.3095...
0.3979 0.6190 0.4421 0.9285 0.4864 0.1769...
0.6632 0.4864 0.2211 0.6632 0.5306 0.4421];
y21 = [0.6632 0.4864 0.5306 0.5748 0.3979 0.4864...
0.5306 0.7958 0.2653 0.8843 0.2653 0.7516...
0.2211 0.6190 0.2211 0.4421 0.5306 0.4864...
0.5748 0.4864 0.4864 0.3979 0.9727 0.7074...
0.8401 0.4864 0.2211 0.4421 0.1326 0.1326...
0.4421 0.6190 0.7074 0.7958 0.7958 0.9285...
0.5748 0.1769 0.1326 0.5306 0.5748 0.3537...
0.4421 0.7516 0.4421 0.4864 0.7074 0.3537...
0.4421 0.5748 0.5306 0.9285 0.4864 0.2653...
0.7958 0.4864 0.2653 0.7516 0.3979 0.3979];
%subplot(3,2,1);
plot(t,x21(1:30),'r:o',t,y21(1:30),'b:+');
set(gca,'xtick',[0 5 10 15 20 25 30]);