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如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注C++内核技术
如何选择机器学习算法Choosing-a-Machine-Learning-Classifier如何针对某个分类问题决定使用何种机器学习算法？ 当然，如果你真心在乎准确率，最好的途径就是测试一大堆各式各样的算法（同时确保在每个算法上也测试不同的参数），...
如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注C++内核技术
如何选择机器学习算法Choosing-a-Machine-Learning-Classifier如何针对某个分类问题决定使用何种机器学习算法？ 当然，如果你真心在乎准确率，最好的途径就是测试一大堆各式各样的算法（同时确保在每个算法上也测试不同的参数），...
Convert XLS to CSV on command line
...
Open Notepad, create a file called XlsToCsv.vbs and paste this in:
if WScript.Arguments.Count < 2 Then
WScript.Echo "Error! Please specify the source path and the destination. Usage: XlsToCsv SourcePath.xls Destination.csv"
Wscript.Quit
End If
Dim oExcel
Set oExcel = CreateObject(...
How to check internet access on Android? InetAddress never times out
...
- does not work on some old devices (Galays S3, etc.), it blocks a while if no internet is available.
B) Connect to a Socket on the Internet (advanced)
// TCP/HTTP/DNS (depending on the port, 53=DNS, 80=HTTP, etc.)
public boolean isOnline() {
try {
int timeoutMs = 1500;
Socke...
How to decide font color in white or black depending on background color?
...ine the overall intensity of the color and choose the corresponding text.
if (red*0.299 + green*0.587 + blue*0.114) > 186 use #000000 else use #ffffff
The threshold of 186 is based on theory, but can be adjusted to taste. Based on the comments below a threshold of 150 may work better for you.
...
Common elements comparison between 2 lists
...der, whereas the list comprehension method preserves the order. Important if anyone needs to consider this. Thanks.
– agftrading
Oct 1 '18 at 15:35
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...
Enter triggers button click
...lt;input type="submit"> . The buttons appear on the page in that order. If I'm in a text field anywhere in the form and press <Enter> , the button element's click event is triggered. I assume that's because the button element sits first.
...
Limit the length of a string with AngularJS
...on () {
return function (value, wordwise, max, tail) {
if (!value) return '';
max = parseInt(max, 10);
if (!max) return value;
if (value.length <= max) return value;
value = value.substr(0, max);
if (wordwise) {
...
How do I quickly rename a MySQL database (change schema name)?
...ne;
Notes:
There is no space between the option -p and the password. If your database has no password, remove the -u username -ppassword part.
If some table has a trigger, it cannot be moved to another database using above method (will result Trigger in wrong schema error). If that is the case...
How to wait for a keypress in R?
... readline(). Simply write:
readline(prompt="Press [enter] to continue")
If you don't want to assign it to a variable and don't want a return printed in the console, wrap the readline() in an invisible():
invisible(readline(prompt="Press [enter] to continue"))
...