String to Variable conversion?

6 views (last 30 days)
Gregory
Gregory on 24 Jan 2013
So first I declare some variables:
data.variable=12
v1='variable'
n=1
The results:
strcat('data.', v1)
data.variable
But
strcat('data.', (strcat('v',num2str(n))))
data.v1
Instead of data.variable. I'm assuming that this is because v1 is a string. What should I do to make the second command return data.variable?

Accepted Answer

per isakson
per isakson on 24 Jan 2013
You might find dynamic field names useful. Doc says:
Generate Field Names from Variables
[...]
For example, create a field name from the current date:
currentDate = datestr(now,'mmmdd');
myStruct.(currentDate) = [1,2,3]

More Answers (2)

Evgeny Pr
Evgeny Pr on 24 Jan 2013
So that's that?
strcat('data.', evalin('base', strcat('v',num2str(n))))

Azzi Abdelmalek
Azzi Abdelmalek on 24 Jan 2013
Why are n't you using one array to save your variables, instead of using, v1,v2,...
For example
data.variable1=10;
variable={'variable1','variable2','variable3'}
out=data.(variable{1})
  2 Comments
Jan
Jan on 24 Jan 2013
And you can decrease the level of indirection further by using data.variable{1} directly instead of hiding the index in the fieldname.

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