Undefined function 'extractFileText' for input arguments of type 'char'

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Sim
Sim 2021-12-15
编辑： Sim 2021-12-16
Hi, when I try the following command
str = extractFileText('mydocument.pdf');
I get this error
Undefined function 'extractFileText' for input arguments of type 'char'.
Error in untitled (line 4)
str = extractFileText('mydocument.pdf');
Why do I get this error?
How can extract data from my PDF then?
P.S.: my MATLAB version is R2019b.

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Sim
Sim 2021-12-15
编辑：Sim 2021-12-16
OK, stupid question since I had not the Text Analytics Toolbox installed - After the installation of that toolbox, it worked well!

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