Advertisements In this python code we are trying to simulate the path of a frisbee that is being shot from a shooter with a certain angle (alpha0). The angle of attack should be the angle at which its being shot, minus the slope of its path. Thus the angle at which the air hits the… Read More Something goes wrong calculating the slope of the simulation

Advertisements <input type="number" placeholder="Number of people*" class="user_number" min="1" max="5"> let user_number = document.getElementsByClassName("user_number"); if($(user_number).val() > 0){ console.log($(user_number).val()); } but when i put anything more than 0 console doesn’t show up help please >Solution : You can attach an event listener for the "input" event so that the value is checked each time it changes. $(‘.user_number’).on(‘input’,… Read More Can't get value of numeric input if input is greater then 0

Advertisements I have a dataframe df containing multiple columns named x_1, x_2, x_3 and so on that are class character but I want to turn them numeric. The problem is, that some of the values are decimals and others are in percentages, containing a %-sign. See my input here: df <- data.frame(Company = c("abc", "def",… Read More Transform column into numeric if some values have % sign and some don't

Advertisements I wonder how for loop can be used at once without non-numeric error. I would like to make multiple character values in a vector Nums, using for loop. But after the third line, the vector becomes chr so cannot continue the rest. This comes out to be same even when I use if loop… Read More How can I use `for loop` at once without non-numeric errors?

Advertisements I have this list of dataframes as follows : library(carData) library(datasets) l = list(Salaries,iris) I only want to select the numeric columns in this list of datasets. Already tried lapply with the function select_if(is.numeric) but it did not work with me. Would appreciate the help. Thanks. >Solution : We can use select with where… Read More Select only numeric columns from dataframes in a list : RSTUDIO

Advertisements I have some variables with are percentage values of their neighbour columns. I would like to turn them into numerics. I found some function to detect them either by column name or the percentage sign and managed to mutate single column with parse_number. How can I extend or simplify this to all columns with… Read More Turn multiple char columns with percentage sign into numerics in R

Advertisements I have a dataframe which stores strings and some of those strings can be interpreted as numbers, however, they are still of class character. I want to automatically convert all columns which can be interpreted as numeric to numeric. I can do this easily with mutate_if, however it produces NAs for every remaining character… Read More R: Convert all columns to numeric with mutate while maintaining character columns

Advertisements I want to export this results: id weight ref_id multiplier cat 1 1,2 1B 1,4 380 2 0,8 1C 1 379 Where id is int8, weight and multiplier are numeric, ref_id is varchar(50) and cat is int4. The problem is that when I export to csv the weight and multiplier values which are greater… Read More Only numbers less than 1 exported correctly to csv Postgresql