我正在尝试创建一个布尔系列，其中我以两种不同的方式处理数据。我正试图找到局部最小值来开始一个布尔计算，在此之前的任何事情，我想返回False。我的问题是我能想到的唯一方法就是将结果系列分为两部分，一部分从组的开始到最小的一部分，一部分从最小到最后一组，最后将它们连接起来。您可以在下面看到我创建了一个False条目列表，然后将其与我从最小开始创建的布尔序列连接起来。这实际上是kludge-y，它不会保持索引的完整性。
ser = pd.concat([pd.Series([False] * (argrelextrema(group['B'].values, np.less)[0][:1][0])), (group[argrelextrema(group['B'].values, np.less)[0][:1][0]:].B.diff().shift(-1) <= -1)])
由此：
B
5876 500.2
5877 500.3
5878 500.4
5879 498.3
5880 499.0
5881 512
...
我最终得到了这样的东西，例如：
1 False
2 False
3 False
5879 True
5880 False
5881 False
...
为了解决这个问题，我想我可以从组中的第一个开始重置索引，但这似乎更像是kludge-y。
ser.index = np.arange(group.index[0], len(ser))
是否有一种更优雅的方法可以在最小值之前返回False并将其与我创建的布尔系列相结合，保持所有索引的完整性？
答案 0 :(得分：0)
您可以使用运算符// pre-coded users
var existingUsers =
[
{
firstname: "Gerry",
lastname: "Agnew",
username: "GerryA",
password: "password123",
email: "gerry@gmit.ie",
phone:"0833333333"
},
{
firstname: "Sean",
lastname: "Duignan",
username: "SeanD",
password: "password456",
email: "sean@gmit.ie",
phone:"0822222222"
},
{
firstname: "Michael",
lastname: "Duignan",
username: "MichaelD",
password: "password789",
email: "michael@gmit.ie",
phone:"0844444444"
}
]
//function setup()
//{
// setup functions
//}
function dropdown()
{
document.getElementById("myDropDwn").classList.toggle("show");
}
//=========================================================================
// Validation Events
username.addEventListener('blur', logUserVerify, true);
password.addEventListener('blur', logPassVerify, true);
newFName.addEventListener('blur', fNameVerify, true);
newLName.addEventListener('blur', lNameVerify, true);
newUName.addEventListener('blur', regUserVerify, true);
newPass.addEventListener('blur', regPassVerify, true);
newEmail.addEventListener('blur', emailVerify, true);
newPhone.addEventListener('blur', phoneVerify, true);
//=========================================================================
// Validation error functions
function loginValidate()
{
if(username == "")
{
document.getElementById("login-user-error").innerHTML = "Username required";
username.focus();
return false;
}
if(password == "")
{
document.getElementById("login-pass-error").innerHTML = "Password required";
password.focus();
return false;
}
}
function registerValidate()
{
if(registerFName == "")
{
document.getElementById("reg-FName-error").innerHTML = "First Name required";
newFName.focus();
return false;
}
if(registerLName == "")
{
document.getElementById("reg-LName-error").innerHTML = "Last Name required";
newLName.focus();
return false;
}
if(registerUName == "")
{
document.getElementById("reg-UName-error").innerHTML = "Username required";
newUName.focus();
return false;
}
if(registerUName.length < 8)
{
document.getElementById("reg-UName-error").innerHTML = "Username must be 8 characters or more";
newUName.focus();
return false;
}
if(registerPass == "")
{
document.getElementById("reg-pass-error").innerHTML = "Password required";
newPass.focus();
return false;
}
if(registerEmail == "")
{
document.getElementById("reg-email-error").innerHTML = "Email required";
newEmail.focus();
return false;
}
if(registerPhone == "")
{
document.getElementById("reg-phone-error").innerHTML = "Phone number required";
newPhone.focus();
return false;
}
}
// end of Validation error functions
//==================================================================================
// Event Functions
function logUserVerify()
{
if (username != "")
{
document.getElementById("login-user-error").innerHTML = "";
return true;
}
}
function logPassVerify()
{
if (password != "")
{
document.getElementById("login-pass-error").innerHTML = "";
return true;
}
}
function fNameVerify()
{
if (registerFName != "")
{
document.getElementById("login-FName-error").innerHTML = "";
return true;
}
}
function lNameVerify()
{
if (registerLName != "")
{
document.getElementById("login-LName-error").innerHTML = "";
return true;
}
}
function regUserVerify()
{
if (registerUName != "")
{
document.getElementById("login-UName-error").innerHTML = "";
return true;
}
if (registerUName > 8)
{
document.getElementById("login-UName-error").innerHTML = "";
return true;
}
}
function regPassVerify()
{
if (registerPass != "")
{
document.getElementById("login-pass-error").innerHTML = "";
return true;
}
}
function phoneVerify()
{
if (registerPhone != "")
{
document.getElementById("login-phone-error").innerHTML = "";
return true;
}
}
function emailVerify()
{
if (registerEmail != "")
{
document.getElementById("login-email-error").innerHTML = "";
return true;
}
}
// end of event functions
//===================================================================================
// Login/Register Functions
function loginUser()
{
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
var userCheck = false;
var passCheck = false;
loginValidate();
for (i = 0; i < existingUsers.length; i++)
{
if(username == existingUsers[i].username)
{
document.getElementById("login-user-error").innerHTML = "";
userCheck = true;
}
else if(username != existingUsers[i].username)
{
document.getElementById("login-user-error").innerHTML = "Invalid, user does not exist";
username.focus();
return false;
}
if(password == existingUsers[i].password)
{
document.getElementById("login-pass-error").innerHTML = "";
passCheck = true;
}
else if(password != existingUsers[i].password)
{
document.getElementById("login-pass-error").innerHTML = "Error, incorrect password";
password.focus();
return false;
}
if(userCheck == true && passCheck == true)
{
document.getElementById("loggedIn-Out").innerHTML = username;
localStorage.user = username;
localStorage.pass = password;
return;
}
}
}
function logoutUser()
{
localStorage.removeItem("user");
localStorage.removeItem("pass");
document.getElementById("loggedIn-Out").innerHTML = "Login/Register";
}
function registerUser()
{
var registerFName = document.getElementById("newFName").value;
var registerLName = document.getElementById("newLName").value;
var registerUName = document.getElementById("newUName").value;
var registerPass = document.getElementById("newPass").value;
var registerEmail = document.getElementById("newEmail").value;
var registerPhone = document.getElementById("newPhone").value;
registerValidate();
localStorage.regFname = registerFName;
localStorage.regLname = registerLName;
localStorage.regUname = registerUName;
localStorage.regPass = registerPass;
localStorage.regMail = registerEmail;
localStorage.regPhone = registerPhone;
var newUser =
{
firstname: registerFName,
lastname: registerLName,
username: registerUName,
password: registerPass,
email: registerEmail,
phone: registerPhone
}
for(i = 0; i < existingUsers.length; i++)
{
if(registerUName == existingUsers[i].username)
{
document.getElementById("reg-UName-error").innerHTML = "Username already exists";
newUName.focus();
return false;
}
if(registerEmail == existingUsers[i].email)
{
document.getElementById("reg-email-error").innerHTML = "Email already exists";
newEmail.focus();
return false;
}
}
existingUsers.push(newUser);
}
// end of Login/Register Functions
//================================================================================
// Password Strength functions
function passwordStr()
{
var passValue = document.getElementById("newPass").value;
if(passValue.length >= 8 && passValue.length <= 10)
{
document.getElementById("passStrength").innerHTML = "Weak";
}
else if(passValue.length > 10 && passValue.length <= 16)
{
document.getElementById("passStrength").innerHTML = "Average";
document.getElementById("passStrength").style.color = "yellow";
}
else if(passValue.length > 16)
{
document.getElementById("passStrength").innerHTML = "Strong";
document.getElementById("passStrength").style.color = "green";
}
else
{
document.getElementById("passStrength").style.color = "red";
}
}
var passInput = document.getElementById("newPass");
passInput.addEventListener("input", passwordStr);
创建一个布尔系列而不是连接两个系列。换句话说，您的布尔系列应满足两个条件：
项目索引大于或等于最小值索引
和
项目满足您的其他布尔计算（无论位置如何，您都可以计算所有项目）
&如您所见，位于最小值之前的项目始终指定为False，而其他项目则指定您计算的布尔值。