Index into a table using a vector of values

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Isabel Chen
Isabel Chen 2016-4-5
评论： Isabel Chen 2016-4-5
Suppose I have a table:
T =
var1 var2
a 1
b 2
c 2
d 3
e 4
f 4
g 4
and I am interested in the rows of T where var2 takes values 1, 3, or 4. Is there a direct way to subset into the table using the vector [1; 3; 4], instead of using a for-loop? To be clear, I am interested in obtaining the following output:
subT =
var1 var2
a 1
d 3
e 4
f 4
g 4
I don't see how I can get this using a logical expression. Any thoughts?

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Azzi Abdelmalek
Azzi Abdelmalek 2016-4-5
编辑：Azzi Abdelmalek 2016-4-5
A=[5 1;7 3;12 4;47 4;6 4]
out=A(ismember(A(:,2),[1 3 4]),:)
  1 个评论
Isabel Chen
Isabel Chen 2016-4-5
Thanks Azzi, that makes sense! Your code is written for arrays -- for tables, I would do something like this:
vec = [1; 3; 4];
rows = ismember(T.var2, vec);
subT = T(rows,:);

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