Extract a Portion of a Vector Based on the Indexes in another Vector

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Dima
Dima 2011-10-26
Hello!
I hope this can be done. I want to extract a few cells from a first long vector below and place them into the third vector based on the indexes (row numbers) in the second vector......the first column contains the raw values, the second vector contains the indexes of the cells which are to be extracted and the third column shows the result of the extraction....in other words I need the third vector to show the 10th, 20th 30th and so on of the cells in the first vector....
39547.00 10 39560.00
39548.00 20 39574.00
39549.00 30 39588.00
39552.00 40 39602.00
39553.00 50 39616.00
39554.00
39555.00
39556.00
39559.00
39560.00
39561.00
39562.00
39563.00
39566.00
39567.00
39568.00
39569.00
39570.00
39573.00
39574.00
39575.00
39576.00
39577.00
39580.00
39581.00
39582.00
39583.00
39584.00
39587.00
39588.00
39589.00
39590.00
39591.00
39594.00
39595.00
39596.00
39597.00
39598.00
39601.00
39602.00
39603.00
39604.00
39605.00
39608.00
39609.00
39610.00
39611.00
39612.00
39615.00
39616.00
39617.00
39618.00
39619.00
39622.00
39623.00
39624.00
39625.00
39626.00
39629.00
39630.00
39631.00
39632.00
39633.00
39636.00
39637.00
39638.00
39639.00
39640.00
39643.00
39644.00
39645.00
39646.00
39647.00
39650.00
39651.00
39652.00
39653.00
39654.00
39657.00
39658.00
39659.00
39660.00
39661.00
39664.00
39665.00
39666.00
39667.00
39668.00
39671.00
39672.00
39673.00
39674.00
39675.00
39678.00
39679.00
I hope there is a simple solution to this.
Thank you!)
Dave

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回答（1 个）

Andrei Bobrov
Andrei Bobrov 2012-1-11
A - your vector column (first long vector)
out = A(10:10:end); % your third vector

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