topic description data source, the diamonds, preview of the ggplot2 package is as follows mean(diamonds[which(diamonds$cut== Ideal ),]$price) problem description 1, is there a more convenient way to calculate the mean value of the y-axis of a ba...
Business: clustering members according to member RFM data. data: CSV,40MB, is greater than 100000 rows. problem: error using factoextra package hkmeans function: Error: cannot allocate vector of size 8143.6 Gb ...
there is an OpenVPN server configured as follows: 1. There is a network card of 192.168.1.0 network segment. The corresponding private ip is 192.168.1.2, and the public network elastic ip is x.x (that is, the service IP of openvpn) 2. There is a netwo...
ask for code display. Watch and other things are implemented by a third-party plug-in library, but the mount has not been found ....
when the data bound by select is dynamic, there will be such a problem. When refreshing the page, I assigned a value to select, but still did not show the corresponding label,. How can I solve this problem? ...
I use the following code to make a cross-domain request for the post method: let formData= new FormData(); for (var attr in data) { datajson formData.append(attr,data[attr]); } fetch(url,{ method:method, m...
I have a txt file there are 10,000 lines the first line is as follows 27466726----6837605--------398705040011----7605----60664----qq what I want to extract is 27466726 6837605 398705040011 7605 60664 qq the second line is as follows zaistarm---...