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matlab总是显示Vectors must be the same lengths,请大师帮忙,

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matlab总是显示Vectors must be the same lengths,请大师帮忙,
我记录了一组数据,想画数据图,但是总是运行不了,程序如下：
>> x=0.4:0.5:0.6:0.7:0.8:0.9:1:1.1:1.2:1.3:1.4:1.5:1.6:1.7:1.8:1.9:2:2.1:2.2:2.3:2.4:2.5:2.6:2.7:2.8:2.9:3:3.1:3.2:3.3:3.4:3.5:3.6:3.7:3.8:3.9;
>> y1=200:200:170:155:152:170:175:195:200:200:195:188:182:165:152:140:135:130:123:118:117:110:110:109:110:110:110:110:115:110:120:120:130:150:155:150;
>> y2=200:200:200:200:203:205:206:205:205:203:203:203:205:203:203:203:201:202:205:203:201:201:203:202:205:205:208:205:205:205:205:205:204:203:204:208;
>> plot(x,y1,x,y2)
Error using ==> plot
Vectors must be the same lengths.
我没有财富值了,请大师帮个忙
数字之间不用: 连接
用逗号或者空格再用[]括起来
例如
x=[0.4,0.5,0.6,0.7];
matlab总是显示Vectors must be the same lengths,请大师帮忙, matlab问题Vectors must be the same lengths. matlab运行遇到问题：Vectors must be the same lengths. matlab plot 提示错误：Vectors must be the same lengths! matlab中错误vectors must be the same lengths 是怎么回事? matlab的Vectors must be the same lengths.错误 matlab提示“Vectors must be the same lengths. 跪等!matlab中Vectors must be the same lengths 求matlab高手~Error using plot Vectors must be the same lengths问 哪位大侠知道这个MATLAB的错误啊 plot Vectors must be the same lengths. MATLAB运行错误：Error using plot Vectors must be the same lengths matlab在什么情况下出现Vectors must be the same lengths错误报告