I used a couple of techniques to smooth the data - a “ring buffer” of samples and a low-pass filter. I have just completed a sketch for dougsauto involving timing pulses at up to about 2000hz. I would use the notation 0.0588 '' only if that last explicit digit is 8 and not if it's rounded upward to 8, whereas I would use 0.0588 '' if it's rounded either upward or downward. I thought to begin with that I would see the transmit LED fail to flicker rarely, but it's in reality a bit the other way round. One can write 1 17 0.0588, meaning there are further digits after the 8. At the moment I'm just taking two measurements and if they are the same sending them to the Serial Monitor. There are different country-specific standards, IEC (British), ANSI, and AS (Australian Standard), that define the symbols used in circuit diagrams across the world If the text argument to one of the text-drawing functions (text, mtext, axis, legend) in R is an expression, the argument is interpreted as a mathematical expression and the output will be. Is there an elegant way - ie not too many lines of code - of not saving those that are outwith a range of say +/- 3uS of a mean of something like 5 measurements. I have no way of knowing if this is the source, interference or some characteristic of pulseIn(). Two quantities are approximately equal when they are close enough in value so the difference is inconsequential in practical terms. I am at the development stage at the moment and am finding that the CMOS 555 test circuit is being measured at 75uS and every 20th measurement or so it is ~69us. What does with a squiggly mean in math Approximate equality is a concept used primarily in physics and engineering, and also occasionally in mathematics. This is a weaker statement than the other two. I'm measuring a pulse width which will vary from about 100us downwards. is a similarity in geometry and can be used to show that two things are asymptotically equal (they become more equal as you increase a variable like n ).
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