Question

为什么matlab 输入help 就显示空白的图

help sign
Warning: Function D:\科研 yl\练习\disp.m has the same name as a MATLAB builtin. We suggest you rename the function
to avoid a potential name conflict.
Warning: Function D:\科研 yl\练习\disp.m has the same name as a MATLAB builtin. We suggest you rename the function
to avoid a potential name conflict.
> In safeWhich at 12
In splitClassInformation>resolveUnaryClass at 430
In splitClassInformation>unaryClassInformation at 408
In splitClassInformation>innerResolveImplicitPath at 130
In splitClassInformation>resolveImplicitPath at 104
In splitClassInformation>innerSplitClassInformation at 44
In splitClassInformation at 26
In helpProcess.getTopicHelpText at 10
In helpProcess.getHelpText at 3
In help at 79
Warning: The following error was caught while executing 'helpUtils.helpProcess' class destructor:
Error using image
Numeric or logical matrix required for image CData

Answer 1

很简单，在你的 D:\科研 yl\练习\disp.m中有与disp同名的函数。disp作为matlab内置函数，你不能与之重名，以免引起冲突。在help sign时maltab需要调用内置disp来显示关于sign相关信息，但却找到了你自己的disp函数，出错了。解决办法：重命名D:\科研 yl\练习\disp.m
下的一个disp函数吧。

Answer 2

disp是matlab保留字，不能用作M文件名

Answer 3

你的M文件名和系统函数有冲突，改名试试