How to use object array elements with sprintf?

Hi, I'm having trouble getting sprintf to allow a string from an object property as an acceptable input.

I have a defined class that has a property 'name'. In another function I've used a loop to define 3 objects of that class into an object array called 'objArray'. I'd like to use sprintf to write a text command but I'm getting an error. I eventually want to write multiple commands with a for loop iterating over the 3 objects in objArray, but I can't figure out the syntax yet for event just the first element of the objArray...

Code:

cmd = sprintf('Object_name: %s',objArray(1).name)

Error:

Error using sprintf Function is not defined for 'cell' inputs.

I've also tried with {}...

Code:

cmd = sprintf('Object_name: %s',objArray(1).name)

Error:

Cell contents reference from a non-cell array object

Am I missing something about the sprintf syntax or should I be using a different function?

Thanks

Answer 1

[Guillaume]

It looks like the name property of your class does not contain a string but a cell array containing a string. You can check that with:

class(objArray(1).name)

I bet it says 'cell' instead of 'char', so either fix your property so it actually contains a string or simply extract the string from the cell with:

cmd = sprintf('Object_name: %s', objArray(1).name{1});

[ScottPT303]

Thank you for the response! I did check the class. Since it is an object array then

class(objArray(1).name)

results in the name of the class (not the property 'name', unintended confusion). Your recommendation using thisObjArray(1).name{1} works! In this case I am actually calling the 'char' within the cell as you said. Thank you for the help!

Answer 2

[Walter Roberson]

t = objArray(1).name;
cmd = sprintf('Object_name: %s', t{1});