I know this is simple but I can’t quite see it. In csharp I would have a variable to store the running total, and using a for loop I would iterate through each ‘slice’, adding it’s value to this variable.
How is this done in VL? I wouldn’t have thought you’d need much more than a pad, a +, and a foreach…
+, foreach and an accumulator that stores the sum and passes it on to the next iteration.
there is also the Sum node for sequences (Spread is a Sequence) that does this for you. you can click open to see how the Sum node is patched…
How do you add the accumulator to the foreach?
start a link (for example from the plus) and click in the accumulator bar that should highlight as soon as you start the link.
Maybe it should be filed as a bug but I noticed that trying to produce the sum of a float in this manner may result in an error.
The results start to diverge from 5794.
yes, that makes sense, Float32 is not capable of representing integer numbers that high:
Floating point numbers have an insane value range, but its important to understand that there is only a certain number of digits of precision.
This also means that the maximum consecutive integer that can be represented is 2^24 = 16,777,216 for Float32 and 2^54 = 9,007,199,254,740,992 for Float64, keep that in mind when connecting integers to float inputs.
read the section “Value Range” here:
Thanks, its the limit that could really cause grief on a project.
Also your examples are a good indication of the perfomance difference an operation has over a record.
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