Str2num error

I am getting the following error:

Input argument "s" is undefined.

Error in ==> str2num at 32
if ~ischar(s) || ndims(s)>2

Here is the portion of the code:

function [x,ok] = str2num(s)
if ~ischar(s) || ndims(s)>2
   error('MATALAB:str2num:InvalidArgument','Requires string or character array input.')
end

if isempty(s)
    x = [];
    ok=false;
    return
end

Anyone know what this might mean?

Answer 1

[Andrew Newell]

If you run it with the following command

str2num

you will get this error. Try

str2num('2')

I am assuming that you saved str2num in a file str2num.m. Do you know that MATLAB has a builtin function str2num?

[Duch]

Thanks for the quick response. Just seeing it now. I guess it would help if I elaborated on the error. So the error refers to line in my code, however the line in my code refers to the builtin MATLAB Function.

So here is the error I am getting...

Input argument "s" is undefined.

Error in ==> str2num at 32

if ~ischar(s) || ndims(s)>2

Error in ==> EFT at 147

blockNum = str2num(n.block);

Here is the line in my program "EFT"

blockNum = str2num(n.block);

Here are the lines in MATLAB's str2num

if ~ischar(s) || ndims(s)>2

error('MATALAB:str2num:InvalidArgument','Requires string or character array input.')

end

[Walter Roberson]

If you put a breakpoint in at that line in your EFT function, then what value and size() and class() does it say n.block is? And if you "step into" the function call and examine s inside, what is it there?

Please use

which -all str2num

to find out whether you somehow have your own str2num.

[Duch]

Thank you.