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.
Back to basics 8 - Matrix Diagonals
Back to basics 13 - Input variables
Flag largest magnitude swings as they occur
Implement simple rotation cypher
Derivative of polynomial
surface of a spherical planet
Inner product of two vectors
Use of regexp
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