Question

新人求助关于2014a里matlab function的问题

每次模拟的时候这个function都要出错，于是建了个很简单的模型，函数如下：
function y = fcn(u)
y = u(1)+u(2)
仿真后出现如下错误：
1.
Simulink does not have enough information to determine output sizes for
this block. If you think the errors below are inaccurate, try specifying
types for the block inputs and/or sizes for the block outputs.
2.
Index expression out of bounds. Attempted to access element 2. The valid range is 1-1.
More information

Function 'MATLAB Function' (#62.42.43), line 4, column 12:
"2"
Launch diagnostic report.
3.
Errors occurred during parsing of MATLAB function 'MATLAB Function'(#61)
4.
Errors occurred during parsing of MATLAB function 'MATLAB Function'(#61)
求各位帮忙啊

Answer 1

很可能你这个模块的输入信号是标量，但模块里面却把输入当向量用的（表达式里面有u(2)）。

Answer 2

在MATLAB function代码编辑界面有edit data 选项，点它编辑里面的信息看看是不是能解决你所遇到的问题。

Answer 3

有难度啊，去微博问问大牛们