How to create variables using strings in an array?

2013 9 15
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str1={'x','trs','height','width'}
str2='db_xtr'
For example, I wanted to do:
for ivar=1:size(str1,2)
C_%str1%_%str2%=ivar^2+2
end
to get following variables:
C_x_db_xtr = 1^2+2
C_trs_db_xtr = 2^2+2
C_height_db_xtr = 3^2+2
C_width_db_xtr = 4^2+2
seems function "genvarname" would do something similar but do not know how to do it for my particular case.
Thanks...

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Azzi Abdelmalek
Azzi Abdelmalek 2013-9-15

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J. Hu
J. Hu 2013-9-15
编辑：Azzi Abdelmalek 2013-9-29
It works. Great. Thanks... Seems the main reason not being recommended is that it runs slowly.
str1={'x','trs','height','width'}
str2='db_xtr'
for ivar=1:size(str1,2)
eval(sprintf('C_%s_%s=%d^2+2',str1{ivar},str2,ivar))
end

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Andrei Bobrov
Andrei Bobrov 2013-9-15

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str1={'x','trs','height','width'}
str2='db_xtr'
input1 = [strcat(str1,'_',str2);num2cell((1:numel(str1)).^2+2)]
C = struct(input1{:})

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J. Hu
J. Hu 2013-9-15
Thanks... however this is not exactly the way I want. It may work for some case. But how about if I need to put this in a multiple level loops and so the variable would be a 1D vector, 2D matrix like C_%str1%_%str2%(ivar1,ivar2)=ivar1^2+ivar2+2.
Walter Roberson
Walter Roberson 2013-9-15
Don't do that.
C{ivar1}{ivar2} = ... some matrix expression ...

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