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I've been looking but I can't find a function to sum difference. I have this code: rates$thisone <- c(diff(rates$Int), NA) rates$nextone <- c(diff(rates$Int, lag=2), NA, NA) rates$lastone <- (rates$thisone + rates...

I have this bit of code: rates=read.csv("Rates2.csv") attach(rates) mysize <- nrow(rates) count <- 0 for(i in 1:(mysize - 3)) { #print(i) thisday <- Date[i] thisone <- Int[i+1] - Int[i] nextone <- Int[i+2] - Int...

Hi, thanks for this. quote If you want to do this kind of simple data management in R, it helps to learn some R programming.unquote yep. I'm trying. we learn by doing, I think, that's what this...

Thanks Bert, no, you're right. but how about doing both at once? that's what I do... and while i'm doing that I have a metalwork project, a computer a-building and a car fixing going on, to...

Thanks a lot everyone for the help. I will fall silent for quite some time now as I try to understand what you've put before me. Yes, my first problem is a lack of understanding of vector and matrix...

Yep. Okay. This better? It's gone to the list I think? And I found the plain text option right before my eyes there at the bottom of the page. thanks for your help. ________________________________ From: Richard M. Heiberger <rmh at...

Hello John, Here I am back again. Having learned no maths yet but I've looked over the results here and they are what I am after. Now I'll try to understand how you did it. :) ----- Original Message ----- From...

Yes, sorry about that. I keep making mistakes I shouldn't make. Thanks for the tip about 'reply all', I had no idea. You can ignore the finalone. I have been doing other work on this and it comes from...