Linked Questions

A simple sounding question with a few sub questions: What is the difference between unpacked vs packed array? Are packed arrays more space efficent, how much so? Are packed arrays more time ...

Packed arrays are very useful because they save memory and generally allow speedier and more efficient calculation times. If a list of data currently stored as a packed array is unpacked, it can slow ...

Sum is for functions; Total is for a list. Product is for a function; what is the command ...

I am looking for a fast and robust way to calculate the Hamming distance of integers. The Hamming distance of two integers is the number of matching bits in their binary representations. I expect that ...

Times and Plus have the same grammar, and so do Product and ...

I was curious about the difference in speed between Total and Sum. I found out Total was ...

For demonstrating how fast C-compiled functions can be, in one of my courses I use the following function for finding the sum of a list of reals: ...

I have two variables: t0, and teta0. The first is computed using several nested sums, the second is computed taking advantage to ...

If I run the code: arr = Table[0.979, 249]; Last@Accumulate[arr] - Total[arr] on Mathematica 11.0 (Windows), I get the result ...

I thought Kahan's summation method would make a nice example for students to use to think about round-off error [W. Kahan, Pracniques: Further Remarks on Reducing Truncation Errors, Commun. ACM 8  (...