R mutate error while merging every two rows into one

I have a CSV data in which I want to merge every two rows in each of the columns. The code below works fine on other CSVs. However, it returns an error while mutating with this particular dataset. How can I fix this? The purpose is to merge every two rows in each of the… Read More R mutate error while merging every two rows into one

Using isset on !$myvar['var']

I’m currently working through a large number of warnings I have logged after my server was updated to PHP 8. One particular point that has me scratching my head is the following code block if (!$option[‘type’] || $option[‘type’] == "select") { $output .= ‘<b>’.$option[‘title’].’:</b>’; } I know that I can use isset($option[‘type’]) like this isset($option[‘type’])… Read More Using isset on !$myvar['var']

Are these two sorting format exactly the same for dict sort in Python?

x = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0} print(x.keys()) s1 = [item[0] for item in sorted(x.items(), key=lambda item: (item[1], item[0]), reverse=True)] s2 = [item[0] for item in sorted(x.items(), key=lambda item: item[1], reverse=True)] print(s1) print(s2) The prints are: dict_keys([1, 3, 4, 2, 0]) [3, 4, 1, 2, 0] [3, 4, 1, 2,… Read More Are these two sorting format exactly the same for dict sort in Python?

rank for nan values based on group

I have dataframe with column d1 and now i am trying calculate ‘out’ column after ranking that column when there in ‘nan’ value with in a column. data_input = {‘Name’:[‘Renault’, ‘Renault’, ‘Renault’, ‘Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’], ‘type’:[‘Duster’, ‘Duster’, ‘Duster’,’Duster’,’Duster’,’Duster’,’Duster’,’Triber’,’Triber’,’Triber’,’Triber’,’Triber’,’Triber’,’Triber’], ‘d1’:[‘nan’,’10’,’10’,’10’,’nan’,’nan’,’20’,’20’,’nan’,’nan’,’30’,’30’,’30’,’nan’]} df_input = pd.DataFrame(data_input) data_out = {‘Name’:[‘Renault’, ‘Renault’, ‘Renault’, ‘Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’,’Renault’], ‘type’:[‘Duster’, ‘Duster’, ‘Duster’,’Duster’,’Duster’,’Duster’,’Duster’,’Triber’,’Triber’,’Triber’,’Triber’,’Triber’,’Triber’,’Triber’], ‘d1’:[‘nan’,’10’,’10’,’10’,’nan’,’nan’,’20’,’20’,’nan’,’nan’,’30’,’30’,’30’,’nan’], ‘out’:[1,np.NaN,np.NaN,np.NaN,2,2,np.NaN,np.NaN,1,1,np.NaN,np.NaN,np.NaN,2]} df_out = pd.DataFrame(data_out) If… Read More rank for nan values based on group

Caret rfe() error "there should be the same number of samples in x and y"

I am having difficulties solving the error "there should be the same number of samples in x and y". I notice that others have posted on this site regarding this error, but their solutions have not worked for me. I am attaching an abbreviated version of my dataset here. x_train is here: x_train <- structure(list(laterality… Read More Caret rfe() error "there should be the same number of samples in x and y"

How do I use the means of the columns of a matrix as prediction values in a linear regression in R?

Problem Statement: Some near infrared spectra on 60 samples of gasoline and corresponding octane numbers can be found by data(gasoline, package="pls"). Compute the mean value for each frequency and predict the response for the best model using the five different methods from Question 4. Note: This is Exercise 11.5 in Linear Models with R, 2nd… Read More How do I use the means of the columns of a matrix as prediction values in a linear regression in R?