function

问题 I have written some code in R. This code takes some data and splits it into a training set and a test set. Then, I fit a "survival random forest" model on the training set. After, I use the model to predict observations within the test set. Due to the type of problem I am dealing with ("survival analysis"), a confusion matrix has to be made for each "unique time" (inside the file "unique.death.time"). For each confusion matrix made for each unique time, I am interested in the corresponding

问题 I have written some code in R. This code takes some data and splits it into a training set and a test set. Then, I fit a "survival random forest" model on the training set. After, I use the model to predict observations within the test set. Due to the type of problem I am dealing with ("survival analysis"), a confusion matrix has to be made for each "unique time" (inside the file "unique.death.time"). For each confusion matrix made for each unique time, I am interested in the corresponding

问题 I have written some code in R. This code takes some data and splits it into a training set and a test set. Then, I fit a "survival random forest" model on the training set. After, I use the model to predict observations within the test set. Due to the type of problem I am dealing with ("survival analysis"), a confusion matrix has to be made for each "unique time" (inside the file "unique.death.time"). For each confusion matrix made for each unique time, I am interested in the corresponding

问题 Question If I do this: $checkName = function ($value) use ($min, $max) { function lengthTest($string, $min, $max) { $length = mb_strlen($string, 'UTF-8'); return ($length >= $min) && ($length <= $max); } }; 1) Is it legal PHP? And ... 2) Is the function lengthTest() in the global namespace, or limited to just the $checkName Closure object? Would it be a private member, then? 3) Can lengthTest() be refereced as a callback method for filter_var_array() like this? $filterInstructionsArray [

问题 This question already has answers here : T(n) = T(n/10) + T(an) + n, how to solve this? (3 answers) Closed last month . Given: T(n) = T(n/10) + T(an) + n for some a (which I know nothing about its value), and that: T(n) = 1 if n < 10 . I want to check if the following is possible (for some a values, and I want to find the smallest possible a ): For every c > 0 there is n 0 > 0 such that for every n > n 0 , T(n) >= c * n Or in other words T(n)=omega(n) Any help is appreciated. 回答1: Suppose

问题 as you can see this code to rename images by post title works fine. even with several posts with the same title. it just puts the numbers: image, image1, image2, image3 .. etc /*Renaming attachment files to the post title*/ function file_renamer( $filename ) { $info = pathinfo( $filename ); $ext = empty( $info['extension'] ) ? '' : '.' . $info['extension']; $name = basename( $filename, $ext ); if( $post_id = array_key_exists("post_id", $_POST) ? $_POST["post_id"] : null) { if($post = get_post

问题 How to add/insert output of a function call that returns multiple fields, as new columns into Pandas dataframe ? Sample code & data: from pandas import DataFrame People_List = [['Jon','Smith',21],['Mark','Brown',38],['Maria','Lee',42],['Jill','Jones',28],['Jack','Ford',55]] df = DataFrame (People_List,columns=['First_Name','Last_Name','Age']) print (df) First_Name Last_Name Age 0 Jon Smith 21 1 Mark Brown 38 2 Maria Lee 42 3 Jill Jones 28 4 Jack Ford 55 def getTitleBirthYear(df): if 'Maria'

问题 Can someone look at my two functions below and suggest what I can do? I have created two functions that basically creates a unique key and this is echoed in a hidden field in a form and then straight after I check if the form has been submitted the second function checks to see if the key in the hidden field matches the key in the session. The problem I am having is now and again it just redirects me to to the forbidden page suggesting the keys don't match although I have not edited the form

问题 Can someone look at my two functions below and suggest what I can do? I have created two functions that basically creates a unique key and this is echoed in a hidden field in a form and then straight after I check if the form has been submitted the second function checks to see if the key in the hidden field matches the key in the session. The problem I am having is now and again it just redirects me to to the forbidden page suggesting the keys don't match although I have not edited the form

问题 I have a recursive function that checks if a string is a palindrome, but my assignment asks me to count the number of palindromes in a string (for example kayak has 2). I'm really confused about how I can implement a recursive function that counts the number of palindromes. Here's my current code: function isPalindrome(string) { if (string.length <= 1) { return true; } let [ firstLetter ] = string; let lastLetter = string[string.length - 1]; if (firstLetter === lastLetter) { let