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purple-air
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Author Comment Last activity Moderation
anaXg "Test comment " | Read more » almost 2 years ago
ms2739165 "https://bollywoodboxofficecollectionindia.blogspot.com/2020/06/kangana-ranauts-thalaivi-box-office.html " | Read more » over 2 years ago
eustatic "Hello! By instinct, I was doing what was recommended already. I think it has worked. We've had experiences where companies will send people to me..." | Read more » over 2 years ago
guolivar "Short answer is NO ... longer answer is still no but with some reasons behind. In general the EPA (and any other regulatory body) needs A LOT of c..." | Read more » over 2 years ago
Ag8n "Purple air would be the best group to answer this question. If the data exists, it would help the sales of the purple air instruments. A quick lo..." | Read more » over 2 years ago
stevie "Hi! tagging in a couple people who might be able to help answer: @Ag8n, @Cbarnes9 , @OrionAllgaier, @BrandonFeenstra, and @guolivar (two for you..." | Read more » over 2 years ago
liz "I bet someone at South Coast Air Quality Management District could point us in the right direction....does anyone know someone we might call or ema..." | Read more » over 2 years ago
stevie "Hello again, wanted to share a response from our friends at Purple Air:: "Using a VPN has nothing to do with privacy of the sensor ... Use of a VP..." | Read more » over 2 years ago
patcon "If the device connects directly to WiFi, then I think a specially configured VPN router might be the only way to keep it from being able to see loc..." | Read more » over 2 years ago
liz "Looks like Purple Air connects directly through the WiFi network: https://www2.purpleair.com/pages/install . Is it possible to connect a Purple Air..." | Read more » over 2 years ago
keshavgarg234156 "Whenever we have such large numbers of columns then we first perform correlation analysis before plotting the graphs. In correlation analysis, we c..." | Read more » over 2 years ago
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joyofsoy "Yes. In my opinion. They’ll catch the particles. The speed will depend on the degree of mixing , ventilation and the size of the restroom. You may ..." | Read more » almost 3 years ago
joyofsoy "We shared this on Twitter and got this response: my students have easily detected vaping signals on similar low-cost pm sensors. that being said, ..." | Read more » almost 3 years ago
Bronwen "I don't know if this is helpful at all, but it shows a comparison of PM associated with e-cigarette vapors: https://www.ncbi.nlm.nih.gov/pmc/articl..." | Read more » almost 3 years ago
Bronwen "This is a really interesting question! I know that the plantower sensors are affected by vapor, humidity, aerosols, though how comparable those res..." | Read more » almost 3 years ago
guolivar "Normalising is your friend when you have things with very different ranges. Depending on what you're looking for you can divide each column by its ..." | Read more » almost 3 years ago
eustatic "Pivot tables? Lookup or index command? Conditional formatting? all of these things can help. i had to have 10 years and 14 plant plot growth s..." | Read more » almost 3 years ago
warren "I also noticed that some very high values make others basically unreadable. So having 2 y-axis scales can sometimes help, i guess, although that's ..." | Read more » almost 3 years ago
warren "Thanks! Yes, i started by removing things like firmware #, for sure. It's interesting to see how some values track each other roughly, while others..." | Read more » almost 3 years ago
guolivar "This is very much dataset, project and software dependent. Sometimes I remove columns, other times I combine them (averaging, adding, etc), other ..." | Read more » almost 3 years ago
warren "Hi @stevie, @Aleah, @Cbarnes9, and @crispinpierce, I posted this in follow up after the purple air datalogs ended up so dense and tough to read! Th..." | Read more » almost 3 years ago
warren "OK, i got the units to show. I trimmed back one file to just a few of the columns, just to make it more readable, but it doesn't have all the diffe..." | Read more » about 3 years ago