I tried to model few linear mixed models...

[englianhu]

Click the link below to watch the video:
https://www.awesomescreenshot.com/video/1547059?key=7be26eec34173b989d245d0d8b3f32ed

Running 3 days for above 3 models, existing hp PC (bought in 2015) unable support desktop visualization and running programming... need to buy a new PC when affort

[englianhu]

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Oct 21, 2020
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Need to upgraded my equipement to enchance the efficiency...

[englianhu]

englianhu/binary.com-interview-question#1
use sparklyr but believe dataset not high-volume, will apply to HFT in https://github.com/englianhu/binary.com-interview-question

> microbenchmark(
+     spark = 
+         smp2_sc %>% 
+             ml_linear_regression(Profit ~ .), 
+     normal = lm(Profit ~., smp2))
Unit: milliseconds
   expr       min         lq       mean    median        uq       max neval
  spark 3213.3874 3416.97000 3620.63197 3558.2209 3774.3810 5413.4950   100
 normal   24.5953   27.57015   29.66484   28.7103   30.0822   87.2707   100
> microbenchmark(
+     spark = 
+         smp2_sc %>% 
+             ml_linear_regression(Profit ~ .), 
+     normal = lm(Profit ~., smp2))
Unit: milliseconds
   expr       min         lq       mean     median         uq       max neval
  spark 3223.9533 3372.34675 3512.10774 3491.44990 3589.48430 4277.6933   100
 normal   25.6651   27.14775   28.81245   28.06895   29.51575   49.0671   100

here's reference to speed up lm:

• https://rpubs.com/maechler/fast_lm
• https://stackoverflow.com/questions/25416413/is-there-a-faster-lm-function

[englianhu]

1. Upgrade to Win10 : https://www.microsoft.com/en-us/software-download/windows10

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2. Wonder what specs use in https://rstudio.cloud

• https://community.rstudio.com/t/what-is-the-machine-rstudio-cloud-runs-on/15557
• https://community.rstudio.com/t/how-much-ram-is-available/6521
• https://community.rstudio.com/t/rstudio-server-problem-with-cpu-and-ram-usage-how-to-improve-it/39965

Asked in https://community.rstudio.com/t/specs-of-rstudio-cloud/87295?u=englianhu

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3. Current Win10 single language edition need to upgrade to pro edition since unable support non-english.

already feedback to Microsoft.