Am I creating dynamic variable names?

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hmhuang
hmhuang2021-11-20
评论: hmhuang ,2021-11-22
After reading this thread, I am still not sure I have created "dynamic variable names", which should be avoided as suggested in that thread.
I have a code snippet as following:
data = [1, 2, 3];
centerX = data(1);
centerY = data(2);
centerZ = data(3);
% And use these variables afterwards
Should I avoid creating those (probably dynamic) variable names, i.e., centerX, centerY, centerZ to use those data and simply/directly use data(1), data(2), data(3) instead?
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hmhuang
hmhuang 2021-11-21
@Stephen But now I understand those example given in that thread were dynamically created using eval, which is different from my hardcoded ones.

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回答(1 个)

Sulaymon Eshkabilov
Sulaymon Eshkabilov 2021-11-20
What you are doing here is not dynamic variable naming. You're assigning a new variable name from your already assigned data.
This example shows the dynamic variable naming and assigning values to the dynamically named variables (U and V):
for jj=1:5
eval(['V' num2str(jj) '= jj'])
eval(['U' num2str(jj) '= ' 'V' num2str(jj) '*jj'])
end
Which is NOT recommended to employ.
That is equivalent to:
V = 1:5;
U = V.*V;
This one is the recommended one.
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