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Getting an array with data

Asked by Hello kity on 12 Dec 2012

Hello,

I have a question regarding getting data from an array

I have one array of data. lets say (array 1):

Index Speed # 1 5 # 2 9 # 3 4 # 4 5

(index 1 has value 5 , index 2 has value 9 etc)

I made another array (array= indexdata) which contain the indexnumbers of the values which are interested for me ( lets say i only want to look at index number two which has the value 2).

So how can i program that matlab makes a new array of the values of the first arrays, whose indeces are listed in the second array,

it sounds complicated but what i want is easy :)

0 Comments

Hello kity

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2 Answers

Answer by Vishal Rane on 12 Dec 2012
Accepted answer

So ,

array1 = [ 5 9 4 5]      % original array
array2 = [ 2 4 ]         % array of indices
array3 = array1(array2)  % elements from array1 as per indices listed in array 2

2 Comments

Hello kity on 12 Dec 2012

hmm i know it was easy

back to basics :)

thank you

José-Luis on 12 Dec 2012

Please accept an answer if it helped you.

Vishal Rane
Answer by Hello kity on 12 Dec 2012

Answer of Vishal was sufficient. But thanks.

But i have a similar question..

assume there is a set of data/rows with NaN's in between them seperating.

i now have the begin and end indexes of each set of data.

for example indices 1 -7 then 2 nans , 9-15 , 2 nans ,18-24 etc.

i have 3 arrays, 1st array set of data, 2nd array indices with begin of row/data, 3rd array end of set of data.

so if continue on example, 2nd array 1 , 9 , 18 and 3rd array 7 , 15 ,24 now all i want is the values between 1 - 7 and 9 -15 and 18-24

hope its clear

1 Comment

Vishal Rane on 12 Dec 2012

Recommend you to create a separate thread for this question, since this question is already marked as answered.

Hello kity

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