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Hey, I'm trying to find how to perform operations with a variable treated as a symbol. For, an extremely simple, example I want to integrate a*x with respect to x and I want to find the indefinite integral of this, (a*x^2/2), or the definite integral with some interval for x. Another example of such a use would be to create a function y<-function(x) {a*x} and by typig y(2) I would get the

I have a data set where one column consists of two numerical factors, separated by a "-". So my data looks something like this: 43-156 43-43 1267-18 . . . There are additional columns consisting of single factors as well, so reading the csv file (where the data is stored) with the sep="-" addition won't work since the rest of the factors are separated by commas. So first

Hey, I have a dataset where two columns are factors and another column consists of values. Each combination of factors can only have a single value assigned to it. I'd like to represent this as a matrix or table where the rows are the first column factors and the columns the second column factors. So that each cell a_ij in the matrix represents the associated value for the factor combination

Hey, I'm using R as a pre-processor for a large dataset with IDs which are numeric (but has no numeric meaning so can be seen as factors). I do some data formating and then write it out to a csv file. However the problem is that the IDs are very long, 18-22 chars long more precisely. R is constantly rewriting these IDs to the abbreviated +eX which hinders me from exporting the data to the

Hi! Pretty low content question but I've had major trouble finding an answer for it so I hope it's alright. I'm obviously new to R, and have been trying to get rid of the numerated output I get in the console. What I mean more specifically is that X<-4;X comes out as [1] 4 and I'd like to get rid of the listing [1]. This isn't usually a problem when working with the