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2003 Aug 04
1
Novice question
...dications using
multivariate linear regression analysis. Single variable predictions
work fine. I am trying the following:
-- Known y's for known x's1 and x's2
ys <- c(133890, 135000, 135790, 137300, 138130, 139100, 139900,
141120, 141890, 143230, 144000, 145290)
xs1 <- c(1:12)
xs2 <- c(22, 24.5, 27, 33, 36.8, 40, 44, 57, 59, 62, 74, 77)
xm <- cbind(xs1, xs2)
-- New x's1 and x's2
nx1 <- c(13:17)
nx2 <- c(82, 85, 88.3, 90, 95)
-- Generate some predictions
samples <- data.frame(xs1=nx1, xs2=nx2)
f <- predict(lm(ys ~ xm), samples)
data.frame(f) yie...
2012 Jul 29
4
R- Help (looping)
Hi,
I'm Wellington from Brazil and I have the following issue:
I've been working on a project a for a while, and I'm having trouble in
using the loop (for)
I need to read a column (c1), and for each value of this column, I need to
check if it's within the control limits
So, I was trying to do this:
For (k in 1: c1)
If (c1< lcl1 | c1 > ucl1) {here I