Displaying 7 results from an estimated 7 matches for "first_record".
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2024 Apr 08
4
Exceptional slowness with read.csv
...million records. I know that
some of the records have errors - unmatched quotes, specifically.?
Reading the file with readLines and parsing the lines with read.csv(text
= ...) is really slow. I know that the first 2459465 records are good.
So I try this:
> startTime <- Sys.time()
> first_records <- read.csv(file_name, nrows = 2459465)
> endTime <- Sys.time()
> cat("elapsed time = ", endTime - startTime, "\n")
elapsed time = ? 24.12598
> startTime <- Sys.time()
> second_records <- read.csv(file_name, skip = 2459465, nrows = 5)
> endTime...
2024 Apr 08
2
Exceptional slowness with read.csv
...> some of the records have errors - unmatched quotes, specifically.
> Reading the file with readLines and parsing the lines with read.csv(text
> = ...) is really slow. I know that the first 2459465 records are good.
> So I try this:
>
> > startTime <- Sys.time()
> > first_records <- read.csv(file_name, nrows = 2459465)
> > endTime <- Sys.time()
> > cat("elapsed time = ", endTime - startTime, "\n")
>
> elapsed time = 24.12598
>
> > startTime <- Sys.time()
> > second_records <- read.csv(file_name, skip =...
2024 Apr 08
1
Exceptional slowness with read.csv
...> some of the records have errors - unmatched quotes, specifically.
> Reading the file with readLines and parsing the lines with read.csv(text
> = ...) is really slow. I know that the first 2459465 records are good.
> So I try this:
>
> > startTime <- Sys.time()
> > first_records <- read.csv(file_name, nrows = 2459465)
> > endTime <- Sys.time()
> > cat("elapsed time = ", endTime - startTime, "\n")
>
> elapsed time = 24.12598
>
> > startTime <- Sys.time()
> > second_records <- read.csv(file_name, skip =...
2024 Apr 10
2
Exceptional slowness with read.csv
...; some of the records have errors - unmatched quotes, specifically.
> Reading the file with readLines and parsing the lines with read.csv(text
> = ...) is really slow. I know that the first 2459465 records are good.
> So I try this:
>
> > startTime <- Sys.time()
> > first_records <- read.csv(file_name, nrows = 2459465)
> > endTime <- Sys.time()
> > cat("elapsed time = ", endTime - startTime, "\n")
>
> elapsed time = ? 24.12598
>
> > startTime <- Sys.time()
> > second_records <- read.csv(file_name, skip...
2024 Apr 08
1
Exceptional slowness with read.csv
...errors - unmatched quotes, specifically.
> > Reading the file with readLines and parsing the lines with read.csv(text
> > = ...) is really slow. I know that the first 2459465 records are good.
> > So I try this:
> >
> > > startTime <- Sys.time()
> > > first_records <- read.csv(file_name, nrows = 2459465)
> > > endTime <- Sys.time()
> > > cat("elapsed time = ", endTime - startTime, "\n")
> >
> > elapsed time = 24.12598
> >
> > > startTime <- Sys.time()
> > > second_record...
2024 Apr 08
2
Exceptional slowness with read.csv
...- unmatched quotes, specifically.
> Reading the file with readLines and parsing the lines with
> read.csv(text
> = ...) is really slow. I know that the first 2459465 records are
> good.
> So I try this:
>
> ?> startTime <- Sys.time()
> ?> first_records <- read.csv(file_name, nrows = 2459465)
> ?> endTime <- Sys.time()
> ?> cat("elapsed time = ", endTime - startTime, "\n")
>
> elapsed time = ? 24.12598
>
> ?> startTime <- Sys.time()
> ?> second_records <- read.cs...
2024 Apr 10
1
Exceptional slowness with read.csv
...ave errors - unmatched quotes,
>> specifically. Reading the file with readLines and parsing the lines
>> with read.csv(text = ...) is really slow. I know that the first
>> 2459465 records are good. So I try this:
>>
>> ?> startTime <- Sys.time()
>> ?> first_records <- read.csv(file_name, nrows = 2459465)
>> ?> endTime <- Sys.time()
>> ?> cat("elapsed time = ", endTime - startTime, "\n")
>>
>> elapsed time = ? 24.12598
>>
>> ?> startTime <- Sys.time()
>> ?> second_records <-...