how can I test for the existence of a financial time series object?

This seems like it would be really easy, but I can't figure it out.

Basically, i want to see if time series A exists, and if it does, I want to make C=merge(A,B). If A doesn't exist, then I just want C=B.

Thanks for any help.

Best, Mike

Answer 1

[dpb]

doc exist

if exist('A')
  C=merge(A,B);
else
  C=B
end

I don't have Finan Toolbox so can't test; I presume exist will return 8 as a class if it does exist. Of course, any nonzero value means there is an A of some sort extant as the logic above is written it doesn't care which type of object it may be.

Answer 2

[Sean de Wolski]

isa and exist will be your friends.

if exist('A','var') && isa(A,'timeseries')
  C = merge(A,B)
else
  C = B;
end