How do I select specific data?

Hi I am new to Matlab and I'm trying to get my feet on the ground here.

I have 2 columns of data and but I only want to select data in column 2 for a given number of rows which I have defined using

> find(time<5)

where time is the number of the variable in column 1.

This has given me the row numbers for all the data I want, Now I was just wandering how I select the data in column 2 for these row numbers?

Thanks

Answer 1

[Mischa Kim]

Use

 mat(find(time<5),2)

Answer 2

[Star Strider]

If your (Nx2) array is called ‘data’:

ExtractedData = data(find(time<5),2);

should work.

Answer 3

[Pico Technology]

Hi Charlie,

You can index a matrix using the row column indices - matrix dimensions are defined as number of rows x number of columns. The following article should help:

Matrix Indexing in MATLAB

If r is the rows i.e.

r = find(time<5)

then you can extract the data from your 2nd column as follows (assuming x is the matrix)

y = x(r, 2);

Hope this helps.

Answer 4

[Sulaymon Eshkabilov]

A simple solution is:

Select_Data = Data(time<5,2);