why do I get these errors ?

Hi, when I want to convart my empty array to a table:

TT  = cell2table(cell(0,11));
TT.Properties.VariableNames = {'DepVar','GC','Reg','Type','n',' b','Pvalue','GCQ_T','ngrid','min_grid','max_grid'};

I get this error:

Error using matlab.internal.datatypes.parseArgs
No method 'parseArgs' with matching signature found.

Error in cell2table (line 31)
    = matlab.internal.datatypes.parseArgs(pnames, dflts, varargin{:});

while i have done this befor and never got this error. I would appreciate it if you could help me solve this error or help me with any other solution to convert my empty 11 column array to a table with a specified name for each column.

[KALYAN ACHARJYA]

Why your question is NOT "urgent" or an "emergency"!

https://in.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

[Walter Roberson]

What shows up for

which -all matlab.internal.datatypes.parseArgs

You should see something like

>> which -all matlab.internal.datatypes.parseArgs
/Applications/MATLAB_R2020b.app/toolbox/matlab/datatypes/shared/matlab_datatypes/+matlab/+internal/+datatypes/parseArgs.m  % static method or package function

[john wu]

Dear Walter Roberson, Thank you so much for your reply, when I run it I get this one :

>> which -all matlab.internal.datatypes.parseArgs
'matlab.internal.datatypes.parseArgs' not found.

[Walter Roberson]

Which MATLAB release are you using?

[john wu]

R2018a

[Walter Roberson]

I just checked in R2018a, and the function does exist. You might have a corrupt MATLAB, and probably need to reinstall.

[john wu]

is there any way other than re-installing ?

[Walter Roberson]

Yes, you could restore from the system backups you have been keeping.

Answer 1

[Steven Lord]

I would set the VariableNames as you're converting the cell array, not after the fact. I made it a 1-by-11 table so you could see the variable names.

TT  = cell2table(cell(1,11), 'VariableNames', ...
    {'DepVar','GC','Reg','Type','n',' b','Pvalue','GCQ_T','ngrid','min_grid','max_grid'})

TT = 1x11 table
       DepVar            GC             Reg             Type             n                b            Pvalue          GCQ_T           ngrid          min_grid        max_grid  
    ____________    ____________    ____________    ____________    ____________    ____________    ____________    ____________    ____________    ____________    ____________

    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}

[john wu]

Dear Steven Lord, thank you for your answer. unfortunately I get a similar error:

Undefined variable "matlab" or class "matlab.internal.datatypes.parseArgs".

Error in cell2table (line 31)
    = matlab.internal.datatypes.parseArgs(pnames, dflts, varargin{:});

I think the MATLAB I have for some reasons that I don't know, can't recognize the 'cell2table ()' , it used to work though.

[Walter Roberson]

It recognized cell2table() with no problem. cell2table() is calling upon the internal function matlab.internal.datatypes.parseArgs which does exist in R2018a, and the line number (31) of the error message does match the line number at which the function is called in R2018a -- so your cell2table.m is probably fine. But you are missing that internal routine.

[john wu]

would you please, give me instructions (or any file or link to follow) so i could solve the problem with the 'internal routin' you mentioned above or to 'restore from the system backups' that you mentioned in comments?

[Walter Roberson]

Did you configure File History? https://support.microsoft.com/en-us/windows/backup-and-restore-in-windows-10-352091d2-bb9d-3ea3-ed18-52ef2b88cbef

Did you configure backups? https://www.windowscentral.com/how-backup-windows-10-automatically

If you are using Mac, do you have Time Machine enabled?

[john wu]

No I did not.

[Rik]

Then you are currently learning an important lesson: make sure you have a backup of anything you don't want to lose.

[Walter Roberson]

You just might be able to take advantage of https://support.microsoft.com/en-us/windows/recover-lost-files-on-windows-10-61f5b28a-f5b8-3cc2-0f8e-a63cb4e1d4c4

[john wu]

Thank you so much again for your time and help.