MATLAB Answers

for loop mixing the results with the previous loops

1 view (last 30 days)
Boby S
Boby S on 16 Dec 2019
Answered: Dheeraj Singh on 19 Dec 2019
Hi
I am using the following loop for evey 10 row of my array (20 row or more* 2 column). then, I want to save the results (Z or res).
converted = table2array(imported);
n=2;
for ind = 1:n
tmp = converted((n-1)*10+1:n*10,:);
X = tmp
X = [true;diff(converted(:,1))~=0];
Y = diff(find([X;true]));
V = accumarray(cumsum(X),~converted(:,2));
Z = [Y,V]
end
res(:,:,ind)= Z
The problem is the code also runs for row 11 (should be first 10 ) then for the next 10 row starts to run from row 12 (which should be 11-20).
This means mixing first 10 rows result with the second batch of 10 rows.
correct sample for 10 rows:
>> M = [0,0;0,1;1,1;1,0;1,1;1,0;0,1;1,1;0,1;0,1]
M =
0 0
0 1
1 1
1 0
1 1
1 0
0 1
1 1
0 1
0 1
>> X = [true;diff(M(:,1))~=0];
>> Y = diff(find([X;true]));
>> V = accumarray(cumsum(X),~M(:,2));
>> Z = [Y,V]
Z =
2 1
4 2
1 0
1 0
2 0

  0 Comments

Sign in to comment.

Answers (1)

Dheeraj Singh
Dheeraj Singh on 19 Dec 2019
The issue is that for loop variable ind is outside the for loop
You can try the following code:
converted = table2array(imported);
n=2;
for ind = 1:n
(ind-1)*10+1
ind*10
tmp = converted((ind-1)*10+1:ind*10,:)
X = tmp
X = [true;diff(converted(:,1))~=0];
Y = diff(find([X;true]));
V = accumarray(cumsum(X),~converted(:,2));
Z = [Y,V]
res(:,:,ind)= Z;
end

  0 Comments

Sign in to comment.