Donno_Nemore
Donno_Nemore t1_jaepw86 wrote
Reply to comment by _throw_hawaii in [D] Running a trained k-means clustering on new data with maximum number of iterations equal to zero or not? by _throw_hawaii
Using known centroids should be more stable . K-means can be stochastic for starting clusters and the result for the same data can vary.
Donno_Nemore t1_jabbex8 wrote
Reply to [Discussion] Can you use a model trained on tweets/product reviews to do sentiment analysis on IT support tickets? by [deleted]
The risks would be a misalignment between the training data and your business data. Business apps with clever acronyms that have strong associations with sentiment would be the major risk.
The value-add of such a system is unclear at best. The IT help desk ticketing systems I am familiar will all have a review/feedback component. The IT staff already know all the A-holes. Are you trying to empirically prove who the A-holes are?
Donno_Nemore t1_iy4icn8 wrote
Reply to comment by sauprankul in eli5 How is computer memory deleted? by unlikemike123
The sub is eli5. In common vernacular memory refers to RAM or ROM. The first thing you should explain to a 5 year old is the right words, to make sure you understand what they are asking.
Yes, it is possible to have memory mapped files or a part of storage that is used like non-volatile memory, but it isn't what is commonly referred to as memory.
Donno_Nemore t1_iy499kh wrote
Reply to comment by nmxt in eli5 How is computer memory deleted? by unlikemike123
This answer is not correct. The post describes a file allocation table as if it were in the beginning of memory. In the simplest designs, the file allocation table is at the beginning of the storage volume, not in memory. In more complex systems, such as distributed file systems, the file allocation table can be stored completely separate for the data storage systems.
Donno_Nemore t1_iy42xaw wrote
Reply to eli5 How is computer memory deleted? by unlikemike123
The question title does not match the question body. Memory and storage are distinct components in many systems.
Most memory systems require an active power source to maintain the values stored in it. As soon as power is lost the energy in the memory begins to shrink and what was in the memory is lost
Storage keeps data even when the power is off. Early types of storage were much slower than memory. Deleting a file is done by changing the values stored. How the file is deleted is determined by a combination of the program deleting it, the operating system being used, the storage format, and the specific storage hardware.
Donno_Nemore t1_jaeq7oy wrote
Reply to comment by _throw_hawaii in [D] Running a trained k-means clustering on new data with maximum number of iterations equal to zero or not? by _throw_hawaii
This sounds like you are being asked to assign the new data to a cluster. Assignment is as simple as calling the distance function for each pair of point and centroid. The minimum score is the cluster assignment.