real-time

问题 I have a long running Python loop (used for machine learning), which periodically prints output and displays figures (using matplotlib). When run in Jupyter Notebook, all the text (stdout) is displayed in real-time, but the figures are all queued and not displayed until the entire loop is done. I'd like to see the figures in real-time, on each iteration of the loop. During cell execution, not when the entire cell execution is done. For example, if my code is: for i in range(10): print(i) show

问题 I'm looking for a C# WinForms charting component, either commercial or open source, that can handle relatively large data sets and be reasonable scalable with regards to chart rendering and updates. The number of data sets to be displayed would be around 30. There would be between 15 and 20 updates per second for each data set. A line chart component would be required for this. 回答1: I have used ZedGraph in the past for realtime stock charts with large histories. It can be a little slow if the

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . I am trying to capture real-time streaming financial time data via Python. I want to initially store the information in a database and then at a later date further develop a program to analyze and make trading decisions based on this data. It would be nice to also be able to

问题 I am trying to implement pagination which should not show duplicate data in different pages on data insertion or deletion. Basic offset-based approach using skip and limit to paginate data is given on this How to implement pagination for mongodb in node.js using official mongodb client? Offset-based approach has a big flaw: if the results list has changed between calls to the API, the indices would shift and cause an item to be either returned twice or skipped and never returned This problem

问题 I am trying to learn how to use socket.io by building a simple chat app using the socket.io library and MEAN stack. From looking at some open source projects(like this one) I have seen that the client, mainly when executing the chat logic, communicates with the server via websockets and not the http client service provided by angular. Does this mean that when using web-sockets for real time updates there is no need to use http to communicate with the server? 回答1: Most assuredly not. It is not

问题 I am trying to learn how to use socket.io by building a simple chat app using the socket.io library and MEAN stack. From looking at some open source projects(like this one) I have seen that the client, mainly when executing the chat logic, communicates with the server via websockets and not the http client service provided by angular. Does this mean that when using web-sockets for real time updates there is no need to use http to communicate with the server? 回答1: Most assuredly not. It is not

问题 I need to run a C++ program at real-time priority on a BeagleBone with Angstrom Linux version 3.2.18. The program calls pthread_setschedparam to attempt to elevate its priority. When logged in as root, I get an "Operation not permitted" error. However, if I first elevate to superuser "su" at the shell prompt, the call to pthread_setschedparam is successful. How can I achieve the same result without running "su" first? I need to run this program as a service that starts automatically at boot

问题 I need to run a C++ program at real-time priority on a BeagleBone with Angstrom Linux version 3.2.18. The program calls pthread_setschedparam to attempt to elevate its priority. When logged in as root, I get an "Operation not permitted" error. However, if I first elevate to superuser "su" at the shell prompt, the call to pthread_setschedparam is successful. How can I achieve the same result without running "su" first? I need to run this program as a service that starts automatically at boot

问题 I need to run a C++ program at real-time priority on a BeagleBone with Angstrom Linux version 3.2.18. The program calls pthread_setschedparam to attempt to elevate its priority. When logged in as root, I get an "Operation not permitted" error. However, if I first elevate to superuser "su" at the shell prompt, the call to pthread_setschedparam is successful. How can I achieve the same result without running "su" first? I need to run this program as a service that starts automatically at boot

问题 I am attempting to collect data from a USB port using D3XX.NET from FTDI. The data is collected and then sent to a fast fourier transform for plotting a spectrum. This works fine, even if you miss some data. You can't tell. However, if you then want to send this data to an audio output component, you will notice data missing. This is where my problem appears to be. The data is collected and then sent to the audio device. All packets are making it within the time span needed. However, the