How to access array element sequentially in for loop?
3 ビュー (過去 30 日間)
古いコメントを表示
Hello,
I have 5 dataset:
data1=rand(1,1000)
data2=rand(1,1000)
data3=rand(1,1000)
data4=rand(1,1000)
data5=rand(1,1000)
To run my simulation, I am running a for loops for i=1:200 (running for loops for 200 times) where when i=1, I have to select the 3 data from data1 starting from index 1 to 3, then from data2 I have to select 2 data and similar way way from all the arrays.
I have to select the values sequentially and a non-repetitive way. That means, when i=2, I have to select data from data1 from index 4 to 6.
Then I will use that data in for calculation. Like, result would be:
result = data1(index1) + data2(index1);
result2=data1(index2) + data2(index2);
at the end of the simulation, I will have result vaules that contains 200 data.
Thank you so much for your time and considerations.
3 件のコメント
回答 (2 件)
Steven Lord
2020 年 7 月 4 日
Rather than creating numbered variables (which is generally discouraged) consider making a matrix or array containing all your data.
data = rand(5, 1000);
q = data(3, 42) % what you would call data3(42) in your original code
I have no idea what pattern you're using to try to extract elements from your data so I can't give any advice about that part. If you describe that pattern in more detail we may be able to help you determine the most efficient way to extract the data.
5 件のコメント
Walter Roberson
2020 年 7 月 17 日
Tania, you are incrementing i_value by 4 at a time, but you use up to data1(i_value+4) . On the first iteration you would use data1(1), data1(2), data1(4), data1(5) (but not data1(3)) . On the second iteration you would use data1(5), data1(6), data1(8), data1(9) (but not data1(7)) . Is it correct that you want to use data1(5) in the first iteration and also use it in the second iteration?
Is it correct that every iteration you want to use data3(1), as well as some other values of data3 ?
Raj Kumar Bhagat
2020 年 7 月 10 日
編集済み: Raj Kumar Bhagat
2020 年 7 月 10 日
I have used 2 more variable to keep track of data2 and data3 index.
Running the following loop we will be able to select data from these data vectors. The data are stored in variable from delay1 to delay6
Hope this helps.
if true
data1=rand(1,1000);
data2=rand(1,1000);
data3=rand(1,1000);
len=200;
trigger=2;
count1 =1;
count2 =1;
for i_value= 1:3:len
% selecting 3 data from data1
delay1=data1(i_value);
delay2=data1(i_value+1);
delay3=data1(i_value+2);
% selecting 2 data from data2
delay4=data2(count1)
delay5=data2(count1+1)
count1 = count1+2;
% selecting 2 data from data2
delay6=data3(count2)
count2 = count2+1;
end
% code
end
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Structures についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!