我已经安装了MATLAB R2015a。当我启动它时，命令窗口中显示的警告很少：
Warning: Function circshift has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.
Warning: Function circshift has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.
> In path (line 109)
In addpath (line 86)
In startup (line 6)
In matlabrc (line 225)
Warning: Function circshift has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.
> In path (line 109)
In addpath (line 86)
In startup (line 7)
In matlabrc (line 225)
Warning: Function circshift has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.
> In path (line 109)
In addpath (line 86)
In startup (line 8)
In matlabrc (line 225)
Warning: Function circshift has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.
> In path (line 109)
In addpath (line 86)
In startup (line 9)
In matlabrc (line 225)
Warning: Function circshift has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.
> In path (line 109)
In addpath (line 86)
In startup (line 10)
In matlabrc (line 225)
当我输入X = zeros(时，命令窗口中会显示错误：
Exception in thread "QueuedMatlabWorker" java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.mlwidgets.help.ProductFilterModel$InstalledState
at com.mathworks.mlwidgets.help.DocCenterProductPrefs.getSelectedProductsFromPref(DocCenterProductPrefs.java:47)
at com.mathworks.mlwidgets.help.DocCenterProductPrefs.getProductFilterModel(DocCenterProductPrefs.java:33)
at com.mathworks.mlwidgets.help.DocCenterDocConfigParams.<init>(DocCenterDocConfigParams.java:37)
at com.mathworks.mlwidgets.help.DocCenterDocConfig.getLocalConfig(DocCenterDocConfig.java:77)
at com.mathworks.mlwidgets.help.DocCenterDocConfig.getInstance(DocCenterDocConfig.java:65)
at com.mathworks.mlwidgets.help.DocCenterReferenceRetrievalStrategy.getInstance(DocCenterReferenceRetrievalStrategy.java:43)
at com.mathworks.mlwidgets.help.DocCenterReferenceRetrievalStrategy.createDataRetriever(DocCenterReferenceRetrievalStrategy.java:79)
at com.mathworks.mlwidgets.help.functioncall.MFunctionCall.getReferenceData(MFunctionCall.java:520)
at com.mathworks.mlwidgets.help.functioncall.MFunctionCall.getSignatureString(MFunctionCall.java:489)
at com.mathworks.mlwidgets.help.functioncall.MFunctionCall.createSignatureString(MFunctionCall.java:233)
at com.mathworks.mde.functionhints.QueuedMatlabWorker$2.run(QueuedMatlabWorker.java:283)
at java.lang.Thread.run(Unknown Source)
我该如何解决这些问题？
更准确地说，当我按 Ctrl + F1 时，会重复此错误。我认为它在MATLAB中用于显示函数输入。