Question

matlab 这是哪里错了呀

>> syms x y;
F=[30*cos(atan((y)/(x-0.6))-180-atan((y-2.786)/(x-4.165))-6.951589993, 30*cos(atan((y)/(x-0.45))-180-atan((y-2.786)/(x-4.165))-7.019463002];
[x,y]=vpasolve(F, [x,y]), size(x)
F=[30*cos(atan((y)/(x-0.6))-180-atan((y-2.786)/(x-4.165))-6.951589993, 30*cos(atan((y)/(x-0.45))-180-atan((y-2.786)/(x-4.165))-7.019463002];
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错误: 表达式无效。调用函数或对变量进行索引时，请使用圆括号。否则，请检查不匹配的分隔符。

Answer 1

题主给出的matlab 的代码运行出错，其错误原因，就是一个粗心大意，F的两个表达式最后缺一个圆括号。应为

F=[30*cos(atan((y)/(x-0.6))-180-atan((y-2.786)/(x-4.165))-6.951589993), 30*cos(atan((y)/(x-0.45))-180-atan((y-2.786)/(x-4.165))-7.019463002)];

更改后运行结果