How to load the specific data to a new variable as per the required condition?

Question

R7 DR 2015-5-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/221585-how-to-load-the-specific-data-to-a-new-variable-as-per-the-required-condition

评论： Image Analyst 2015-5-30

I have 4 data sets for example..

a=[0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9] 
b=[ 1  2  3  4  5  6  7  8  9]  
c=[11 12 13 14 15 16 17 18 19] 
d=[21 22 23 24 25 26 27 28 29]

In this case how to load the data from the specific variable 'c' if 'a'>0.2 && <0.7.

In this example the result is e=[13 14 15 16]

Thanks

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2015-5-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/221585-how-to-load-the-specific-data-to-a-new-variable-as-per-the-required-condition#answer_181066

在 MATLAB Online 中打开

Try this:

a=[0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9] 
b=[ 1  2  3  4  5  6  7  8  9]  
c=[11 12 13 14 15 16 17 18 19] 
d=[21 22 23 24 25 26 27 28 29]
columnsToExtract = a>0.2 & a<0.7
e = c(columnsToExtract)  % [13 14 15 16]

2 个评论
显示无隐藏无

Image Analyst 2015-5-30

在 MATLAB Online 中打开

R7 DR's "Answer" moved here:

Thanks its working fine.

If I want to extract the data from two varaibles at the same time, then how to modify the code?

For example  from 'd' to 'f' %%[23 24 25 26].
             from 'C' to 'e' %%[13 14 15 16].
Thanks

Image Analyst 2015-5-30

在 MATLAB Online 中打开

It's the same concept. Assuming you're still basing what columns to extract on "a", then you just do:

% Extract from "d" and put into "f"
f = d(columnsToExtract)
% Now extract from some new capital C vector, 
% which will overwrite the "e" we got from lower case "c" vector
e = C(columnsToExtract)

If this answers your question, can you mark it as "Accepted".

请先登录，再进行评论。