How to select variable based on numbers in variable name?

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Laura
Laura 2011-6-2
I have variables named as X1, X2, X3,...,X72. Is there a way to place them in a vector based on the number in the variable name? For example, suppose I want to put the multiples of 5 in a vector: vec=[X5 X10 X15...X70]. However, I want the value assigned to the variable and not the variable name to be displayed.

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回答（2 个）

Sean de Wolski
Sean de Wolski 2011-6-2
Jason Ross
Jason Ross 2011-6-2
Do you need to create all these variables with the names, or you could you make an array called X and then use the index?
X = [10 20 30 40 50]
vec = [X(1) X(3)]
Otherwise, it sounds like you are going to be reinventing a lot of stuff that is already implemented.
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Jason Ross
Jason Ross 2011-6-2
So that will give you a list of the .dat files in the directory. I'm assuming there is some code that actually opens the filename and then reads the content of the file (which I understand to be a single number).
e.g.
example1.dat contains "12345"
example2.dat contains "678910"
and so on for 72 times.

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