streamflow | Lock-free multithreaded memory allocation

by scotts C Version: Current License: No License

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kandi X-RAY | streamflow Summary

streamflow is a C library. streamflow has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Lock-free multithreaded memory allocation

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Support

streamflow has a low active ecosystem.

It has 96 star(s) with 14 fork(s). There are 11 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of streamflow is current.

Quality

streamflow has no bugs reported.

Security

streamflow has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

streamflow does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

streamflow releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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streamflow Key Features

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streamflow Examples and Code Snippets

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Community Discussions

Trending Discussions on streamflow

Call the column of a data frame by position using group_by function in R

Subsetting dates in a nested list with dates in data frame in R

Output of a function in R change with the number of inputs

How to use Trycatch to skip errors in data downloading in R

create date from separate columns with day, month year within a nested table in R

Count the number of values per column above a range of thresholds in R

transform list of data frames to obtain means for df names and yearly means

Select the same period every year in R

Using a nested lookup table to find values above thresholds in second table and quantify them in R

Get sum of row differences with Pandas .diff()

QUESTION

Call the column of a data frame by position using group_by function in R

Asked 2021-May-23 at 19:04

I want to calculate the monthly mean values in each year for daily streamflow data. I am using the functions group_by and summarize for this purpose.

This is my input:

and this is my code:

...

ANSWER

Answered 2021-May-23 at 19:04

We could use a couple of options i.e. get the names of the data with the corresponding index, convert to symbol and evaluate (!!)

Source https://stackoverflow.com/questions/67663333

QUESTION

Subsetting dates in a nested list with dates in data frame in R

Asked 2021-May-21 at 21:19

I have a nested list with dates and river streamflow data (Flow) in different river reaches (910, 950, 1012, 1087):

...

ANSWER

Answered 2021-May-21 at 19:26

Flowtest1 isn't a dataframe, just a list of two vectors, so you can't use bracket notation to subset both vectors at once. Also, dates_FF is created with two arguments instead of a vector, so it doesn't work. as.Date is vectorized, so if you just make the two input dates a vector it will work. This returns what you want with no need for Flowtest1

Source https://stackoverflow.com/questions/67641347

QUESTION

Output of a function in R change with the number of inputs

Asked 2021-May-17 at 20:34

I am trying to run a function to download data from the USGS website using dataRetrieval package of R and a function I have created called getstreamflow. The code is the following:

...

ANSWER

Answered 2021-May-17 at 20:34

Based on the image showed in the new data, each element in the list is nested as a list. We can extract the list element (of length 1) with [[1]] and then apply the Filter

Source https://stackoverflow.com/questions/67576371

QUESTION

How to use Trycatch to skip errors in data downloading in R

Asked 2021-May-17 at 14:37

I am trying to download data from the USGS website using the dataRetrieval package of R.

For that purpose, I have generated a function called getstreamflow in R that works fine when I ran for example.

...

ANSWER

Answered 2021-May-17 at 14:37

Answer

You wrote the tryCatch outside of getstreamflow. Hence, if one site fails, then getstreamflow will return an error and nothing else. You should either supply 1 site at a time, or put the tryCatch inside getstreamflow.

Example

Source https://stackoverflow.com/questions/67568420

QUESTION

create date from separate columns with day, month year within a nested table in R

Asked 2021-Apr-26 at 15:16

I'm working on hydrological data in nested tables. Besides streamflow (Q) I have dates split into 3 columns (one for days, second for months and third for year).

...

ANSWER

Answered 2021-Apr-26 at 15:16

Since it's a nested list use nested lapply :

Source https://stackoverflow.com/questions/67269246

QUESTION

Count the number of values per column above a range of thresholds in R

Asked 2021-Feb-10 at 02:43

How to count the number of values per column above a sequence of thresholds ?

i.e.: calculate for each column, the number of values above 100, then above 150, then above ... and store the results in a data frame ?

...

ANSWER

Answered 2021-Feb-10 at 02:42

myseq <- seq(75, 400, by=25)
as.data.frame(do.call(rbind, lapply(data, function(z) table(findInterval(z, myseq)))))
#        0  1  2  3  4  5  6  7  8  9 10 11 12 13
# X1915 17 19 26 27 41 23 26 33 27 22 30 25 21 28
# X1916 14 26 20 28 25 26 22 23 35 28 26 30 22 40
# X1917 20 30 24 31 24 28 22 25 28 34 18 21 26 34

Source https://stackoverflow.com/questions/66130168

QUESTION

transform list of data frames to obtain means for df names and yearly means

Asked 2020-Nov-10 at 21:36

I’m analyzing river streamflow data with R language and I have a list of data frames. Each data frame represents a subbasin (910, 950, 1012 and 1087) and has the exact same structure and number of variables and contains a value of IHA indicators (IHA1, IHA2) per Year (2004:2007)

...

ANSWER

Answered 2020-Nov-10 at 21:04

Hi Joanna a possible solution would be this:

Source https://stackoverflow.com/questions/64776304

QUESTION

Select the same period every year in R

Asked 2020-Nov-09 at 07:04

This seems really simple, yet I can't find an easy solution. I'm working with future streamflow projections for every day of a 25 year period (2024-2050). I'm only interested in streamflow during the 61 day period between 11th of April and 10th of June each year. I want to extract the data from the seq and Data column that are within this period for each year and have it in a data frame together.

Example data:

...

ANSWER

Answered 2020-Nov-08 at 22:50

Here is an option. Do a group by year of the 'seq_x', then summarise to create a list column by subsetting 'Data' based on the first and last elements of 'seq_x' and select the column

Source https://stackoverflow.com/questions/64743793

QUESTION

Using a nested lookup table to find values above thresholds in second table and quantify them in R

Asked 2020-Oct-29 at 01:20

I’m analyzing river streamflow data with R language and I have two nested lists. First holds data (Flowtest) from different river reaches called numbers such as 910, 950, 1012 and 1087. I have hundreds of daily streamflow measurements (Flow), but as I’m preparing yearly statistics the exact day and month doesn’t matter. Each measurement (Flow) is referenced to a year (Year) in the Flowtest table.

...

ANSWER

Answered 2020-Oct-29 at 01:20

You can use combination of Map with aggregate :

Source https://stackoverflow.com/questions/64583475

QUESTION

Get sum of row differences with Pandas .diff()

Asked 2020-Oct-26 at 03:52

I am doing a time-series analysis where I need to calculate the change in several attributes over time. Pandas makes a simple version of this easy; the .diff(periods=n) function will calculate the difference between a row and the preceding n rows, however, that is not quite what I need...

...

ANSWER

Answered 2020-Oct-26 at 03:52

sum of the single day differences over a span of n days

First, diff consecutive rows then do a rolling sum. Since the series after diff already has difference for 2 consecutive rows, for rolling sum we only provide period-1 (in our case 3-1 = 2).

Source https://stackoverflow.com/questions/64530931

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Vulnerabilities

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Install streamflow

You can download it from GitHub.

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