Using Variable Contents to Create Variable names

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Brian
Brian am 27 Feb. 2012
Kommentiert: Stephen23 am 7 Jul. 2017
I have two variables (RtnType and MyPG) each with their values down the rows. I would like to write the results of my code loop as I iterate through these variables to the proper variable derived by combining the values of these two variables.
RtnType = {'Daily' 'RollWeek' 'RollMonth' 'RollQtr' 'YTD' 'RollYear' 'SinceIncept'};
MyPG = {'MTAC' 'MTAM' 'MTAG' 'MLCE'};
for i = 1:4
for x = 1 to 7
MyMedian = [1.5];
%Desired Concatenation look
%MyPG{i,1} & '_' & RtnType{x,1} = [MyPG{i,1} & '_' & RtnType{x,1},[DailyMedian]
%Actual statement result for i=1 and x=1
MTAC_Daily = [MTAC_Daily; MyMedian]
end
end
Can someone show me how to write the results of each loop to different vectors that have been pre-created?
Thanks a lot, Brian
  1 Kommentar
Stephen23
Stephen23 am 7 Jul. 2017
Do NOT waste your time writing bad code that creates separate variables with numbered variable names: "A frequent use of the eval function is to create sets of variables such as A1, A2, ..., An, but this approach does not use the array processing power of MATLAB and is not recommended."
Just use indexing: simple, fast, efficient, neat, simple, easy to understand, much less buggy, easier to debug, etc, etc, etc.
etc, etc, etc.

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Akzeptierte Antwort

Jonathan Sullivan
Jonathan Sullivan am 27 Feb. 2012
eval([MyPG{i} '_' RtnType{x} '= [' MyPG{i} '_' RtnType{x} ',' num2str(MyMedian) '];'])
  1 Kommentar
Brian
Brian am 27 Feb. 2012
Thanks this answer works perfectly. The only thing I added was decimal precision on the num2str command to prevent it from rounding me to 4 decimal places.
Thanks a lot!

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Honglei Chen
Honglei Chen am 27 Feb. 2012

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