# delete value in matrix with condition

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ha ha on 4 Mar 2019
Commented: ha ha on 4 Mar 2019
Let's say, I have 2 matrix:
A=[1 9 5 6;2 1 4 5;3 4 3 5];%matrix A
dist_A=[0.1 0.6 0.4 0.5; 0.5 0.1 0.2 0.3; 0.2 0.9 0.7 0.4];%matrix dist_A
condition=0.5;%this is value to check condition
A=[1 9 5 6
2 1 4 5
3 4 3 5];
dist_A=[0.1 0.6 0.4 0.5
0.5 0.1 0.2 0.3
0.2 0.9 0.7 0.4];
My question is:
1/ I want to delete values in matrix "dist_A" that satisfy condition: If that value <= condition(0.5)
I hope the result is:
result_dist_A=[0.1 0.4 ; 0.1 0.2 0.3; 0.2 0.4];
2/ Delete the value in matrix A having the same index of the deleted value in matrix "dist_A"
I hope the result is:
result_A=[1 5 ; 1 4 5; 3 5];
##### 1 CommentShowHide None
KSSV on 4 Mar 2019
result_A=[1 5 ; 1 4 5; 3 5];
The above will trhow an error. I would suggest you to replace the unwanted value with NaN...so that dimensions remain apt and no error pops out.

madhan ravi on 4 Mar 2019
Edited: madhan ravi on 4 Mar 2019
R=arrayfun(@(x)A(x,dist_A(x,:)<0.5),1:size(dist_A,1),'un',0);
R{:}
Gives:
ans =
1 5
ans =
1 4 5
ans =
3 5
>>
##### 1 CommentShowHide None
ha ha on 4 Mar 2019
@madhan ravi . Thanks so much.