Amitava, it is fantastic that you are contributing problems, but you really need to spend more time specifying what the solution should do. The person solving is left needing to guess too much.
Definitely Agree with the cyclist. W/o example it is impossible to understand the task to achieve.
The DC component of a signal is usually its mean. Now filter can have many meanings, but in this case, it means to remove the signal variation.
Omit columns averages from a matrix
Find the largest value in the 3D matrix
06 - Matrix Equations 2
length of a vector
Vectors counting by 2
Use of regexp
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