Keep Variable Name when adding Variables to a table

Hi!

I have a problem with Variable Names when adding Variables to a table. It seems odd, as it works with the "patients" example from the documentation but not with my own table and Variables. Here is a part of the code:

out.combinednew  = addvars(out.combined,out.newvars.(1));

Unable to resolve the name 'out.combined'.

The added Variable gets the name "Var32" instead of "Q_end".

I have also tried writing one column of the table into a variable and then adding that variable to the table but it is the same problem.

Is there another way to keep the Variable Names when adding a new Variable?

Answer 1

[Walter Roberson]

The relevant code is using inputname() to try to figure out variable names. inputname() returns empty for any expression giving a value, but returns the variable name in the caller if a plain unindexed variable was passed.

out.newvars.(1) is an expression that pulls out the contents of the first variable of a table, but it is not a plain unindexed variable name, so inputname will return empty.

You should use

out.combinednew  = addvars(out.combined,out.newvars.(1), 'NewVariableNames', out.Properties.VariableNames(1));

[Walter Roberson]

Note by the way that when you are not using the relative-position properties, that you might as well just do

out.combinednew = [out.combined, out.newvars(:,1)];

[Jan Böttner]

thanks a lot!

Answer 2

[Florian Bidaud]

Hi

out.combinednew  = addvars(out.combined,out.newvars.(1),'NewVariableNames','Q_end');

[Jan Böttner]

thanks for your reply, this works but i want the variable name dependend as it might change with different inputs to the code :)