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Removing outliers in R with tools from dplyr and ggplot2 (CC232)

  Рет қаралды 6,886

Riffomonas Project

Riffomonas Project

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@pratish143
@pratish143 2 жыл бұрын
Thanks!
@Riffomonas
@Riffomonas 2 жыл бұрын
My pleasure! Thanks for tuning in 🤓
@Riffomonas
@Riffomonas 2 жыл бұрын
I just realized that you sent me $10 - thank you so much. That is very generous and much appreciated!
@haraldurkarlsson1147
@haraldurkarlsson1147 2 жыл бұрын
Pat, This two-part exercise was probably my most favorite of those I have observed from you. I am currently in Northern Indiana so not suprisingly my data looks similar to yours. The data set I used went back to the early 1890s but there was a break in data collection from about 1910-1920 (World War I?). I did not see the extreme values in precip and snow that you observe. The most extreme precip and snow values were around 200 mm and 500 mm , respectively. When looking at the ten highest snow values I found events that line up with the big snow fall in Chicago in late January 1967. The station I am using may be experiencing higher precip (snow and rain) due to the lake effect. I am not sure how far or how large the lake effect is in Michigan in your neck of the woods. Finally, I converted the snow to rain using 1:12 ratio suggested by NOAA for this region. I thought it might be interesting to compare precip and "converted from snow precip". There are some 'hint' of a trend but caution is needed since the conversion of snow to precip is highly dependent on temperature.
@Riffomonas
@Riffomonas 2 жыл бұрын
Very cool! Great job digging into your data 👍
@lalitpl4
@lalitpl4 2 жыл бұрын
I stumbled upon one of your videos few months back. My life is much easier since then. Your videos helped immensely in my work. Thank you!
@Riffomonas
@Riffomonas 2 жыл бұрын
Wonderful! I’m so glad you found the channel 🤓
@petongtitus
@petongtitus Жыл бұрын
how about replacing outliers with NA instead of removing outliers? could you show me how?
@cyrillejar1914
@cyrillejar1914 2 жыл бұрын
Very intresting and useful, as always. What do you think about tests like dixon's test or Grubb's test to identify outliers ?
@Riffomonas
@Riffomonas 2 жыл бұрын
I think it’s best to understand why an observer is an outlier before removing it
@brianwood9610
@brianwood9610 2 жыл бұрын
Wouldn't it be worth imputing a median value to those outliers?
@Riffomonas
@Riffomonas 2 жыл бұрын
Hmmm. Interesting suggestion. Considering how patchy the precipitation/snow fall data are I’m not sure. Maybe for the temperature data which would be more continuous
@sarvagyavatsal9569
@sarvagyavatsal9569 2 жыл бұрын
very useful
@Riffomonas
@Riffomonas 2 жыл бұрын
Wonderful! I’m glad you enjoyed it 🤓
@sven9r
@sven9r 2 жыл бұрын
First 😝
@Riffomonas
@Riffomonas 2 жыл бұрын
🤓well done
@yaqinguo8971
@yaqinguo8971 2 жыл бұрын
Thanks!
@Riffomonas
@Riffomonas 2 жыл бұрын
No problem!
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