Lookup Table the floor value
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I´m a new user of Matlab and I´m trying to get the y floor value of a table. I´ve looking for it and the interpn1 command only let you to get the nearest value not the floor.
An example is for the table:
1 10
10 30
If I ask for the value of 9, I need to get 10 (if I use interpn1 nearest I get 30).
Thanks in advance
采纳的回答
Mike Hosea
2011-4-12
For a table x,y with x sorted ascending, you can do a linear time lookup for the value xi in the "floor" sense via
y(find(xi>=x,1,'last'))
-- Mike
更多回答（4 个）
the cyclist
2011-4-12
If A is your array, I think you want something like:
y_floor = min(A(A>9))
Andrei Bobrov
2011-4-12
added variant
A = randi(120,5,5)
n = 9
[~,I] = min(abs(A(:)-n));
A(I)
Walter Roberson
2011-4-12
0 个投票
Use the two output form of histc() to get the bin numbers, and use the bin numbers to index the y table.
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