MATLAB: Num2str errors

num2str

As the following code shown, there will always be an error saying "Unexpected MATLAB expression" for the first "num2str" in the row defining filename. Please, help me!!!

Best Answer

The ‘filename’ assignment in your code is not the correct syntax.

It should be:

filename = ['A',num2str(kk),'.dat'];

Note the square brackets [], and not parentheses ().

However, using the sprintf function is preferable:

filename = sprintf('A%d.dat', kk);

I would use that instead.

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MATLAB: Num2str error

You get this error if you try to use num2str with a cell format

s={'123'}
out=num2str(s)

s should be a number

s=123
out=num2str(s)

or a string

s='123'
out=num2str(s)

MATLAB: Error message while using if statement

Syntax of if conditional:

if expression
    statements
else
    statements
end

There should be no newline character between 'if' and expression.

The following code should work.

if exist(fn, 'dir')                             % if expression
    warning('This folder already exists')       % Statements
else                                            % else
    mkdir(fn)                                   %Statements
end

Best Answer

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MATLAB: Num2str error

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