Hi,
Like this perhaps?
slope = diff(y) / diff(x)
str(slope)
num [1:499] 1.5068 -1.8406 2.1745 0.0676 -2.6088 ...
HTH,
baptiste
2009/10/8 FMH kagba2...@yahoo.com:
Dear All,
Let 499 piece-wise lines were buit up by 500 pair of observations, via R
code below.
x - 1:500
y - rnorm(500)
plot(x, y, type = 'b')
I was trying to compute all the slopes for the lines which were connected
between two adjacent points. For instance, slopes of lines between first and
second points, second and third points, and so on, until between points 499
and 500, respectively, but sadly, i never found a suitable function do this
computatation efficiently.
Could someone please advice me on doing this?
Thank you
Fir
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and provide commented, minimal, self-contained, reproducible code.
